Comtrend Corporation CT-5621T User Manual

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CT-5621T

ADSL2+ Multi-port Router

User’s Manual

Version A3.2, November 23, 2007

261055-015

Warning

Before servicing or disassembling this equipment, always



disconnect all power and telephone lines from the device

 Use an appropriate power supply and a UL Listed telephone line

cord. Specification of the power supply is clearly stated in

Appendix C

Preface

This manual provides information to network administrators. It covers the

installation, operation and applications of the ADSL2+ multi-port router.

The individual reading this manual is presumed to have a basic understanding of telecommunications. For product update, new product release, manual revision, software upgrade, technical support, etc., visit Comtrend Corporation at

http://www.comtrend.com

This document is subject to change without notice.

messages contained herein are proprietary to Comtrend Corporation. No part of

this document may be translated, transcribed, reproduced, in any form, or by any

means without prior written permission by Comtrend Corporation.

Technical support

If you find the product to be inoperable or malfunctioning, please contact a technical support engineer for immediate service by email at INT-support@comtrend.com

Table of Contents

CHAPTER 1 INTRODUCTION......................................................................................................5

1.1 FEATURES..................................................................................................................................5

1.2 APPLICATION.............................................................................................................................6

1.3 FRONT PANEL LED INDICATORS................................................................................................7

CHAPTER 2 INSTALLATION ........................................................................................................9

2.1 HARDWARE INSTALLATION........................................................................................................9

2.2 USB DEVICE DRIVER AUTO-RUN INSTALLATION ....................................................................11

2.3 USB DRIVER MANUAL INSTALLATION (64BIT OS)..................................................................14

CHAPTER 3 LOGIN VIA THE WEB BROWSER......................................................................19

3.1 IP ADDRESS.............................................................................................................................20

3.2 LOGIN PROCEDURE .................................................................................................................21

3.3 DEFAULT SETTINGS .................................................................................................................23

CHAPTER 4 DEVICE INFO........................................................................................................24

4.1 WAN.......................................................................................................................................25

4.2 STATISTICS ..............................................................................................................................26

4.2.1 LAN Statistics..................................................................................................................27

4.2.2 WAN Statistics.................................................................................................................28

4.2.3 ATM statistics.................................................................................................................29

4.2.4 ADSL Statistics...............................................................................................................31

4.2.5 Route...............................................................................................................................33

4.2.6 ARP.................................................................................................................................33

4.2.7 DHCP.............................................................................................................................34

CHAPTER 5 QUICK SETUP.........................................................................................................35

5.1 AUTO QUICK SETUP ................................................................................................................36

5.2 MANUAL QUICK SETUP...........................................................................................................37

5.2.1 PPP over ATM (PPPoA) and PPP over Ethernet (PPPoE)............................................39

5.2.2 MAC Encapsulation Routing (MER)..............................................................................44

5.2.3 IP Over ATM...................................................................................................................47

5.2.4 Bridging..........................................................................................................................51

CHAPTER 6 ADVANCED SETUP................................................................................................53

6.1 WAN.......................................................................................................................................55

6.2 LAN........................................................................................................................................56

6.3

NAT ........................................................................................................................................58

6.3.1 Virtual Servers................................................................................................................58

6.3.2 Port Triggering...............................................................................................................60

6.3.3 DMZ Host.......................................................................................................................61

6.3.4 ALG ................................................................................................................................62

6.4 SECURITY................................................................................................................................63

6.4.1 IP Filtering.....................................................................................................................63

6.4.2 Parental Control .............................................................................................................66

6.4.3 MAC Filtering.................................................................................................................67

6.5 QUALITY OF SERVICE ..............................................................................................................69

6.6 ROUTING .................................................................................................................................72

6.6.1 Default Gateway.............................................................................................................72

6.6.2 Static Route.....................................................................................................................73

6.6.3 RIP..................................................................................................................................74

6.7 DNS........................................................................................................................................75

6.7.1 DNS Server.....................................................................................................................75

6.7.2 Dynamic DNS.................................................................................................................76

6.8 DSL ........................................................................................................................................78

6.9 PORT MAPPING........................................................................................................................79

6.10 CERTIFICATE............................................................................................................................82

6.10.1 Local...............................................................................................................................82

6.10.2 Trusted CA......................................................................................................................84

CHAPTER 7 DIAGNOSTICS........................................................................................................85

CHAPTER 8 MANAGEMENT......................................................................................................87

8.1 SETTINGS ................................................................................................................................87

8.1.1 Configuration Backup.....................................................................................................88

8.1.2 Update Settings...............................................................................................................89

8.1.3 Restore Default...............................................................................................................90

8.2 SYSTEM LOG ...........................................................................................................................92

8.3 TR-069 CLIENT.......................................................................................................................95

8.4 INTERNET TIME .......................................................................................................................97

8.5 ACCESS CONTROL...................................................................................................................98

8.5.1 Services...........................................................................................................................99

8.5.2 Access IP Addresses......................................................................................................100

8.5.3 Passwords.....................................................................................................................101

8.6 UPDATE SOFTWARE................................................................................................................102

8.7 SA VE AND REBOOT ................................................................................................................103

APPENDIX A: FIREW ALL..............................................................................................................104

APPENDIX B: PIN ASSIGNMENTS...............................................................................................110

APPENDIX C: SPECIFICATIONS.................................................................................................. 111

APPENDIX D: SSH CLIENT ...........................................................................................................113

Chapter 1 Introduction

The CT-5621T is an ADSL router with four 10/100 Base-T Ethernet ports and a

single USB port providing wired LAN connectivity. The CT-5621T ADSL2+

multi-port router provides state of the art security features such as Firewall and

VPN passthrough. The CT-5621T is designed for both residential and business

applications that require wired connectivity to an ADSL broadband network. The

CT-5621T supports up to 16 contiguous virtual connections, allowing for multiple

simultaneous connections.

1.1 Features

• UPnP

• RADIUS client

• IP /MAC address filtering

• Static route/RIP/RIP v2 routing functions

• Dynamic IP assignment

• IP QoS

• NAT/PAT

• IGMP Proxy

• DHCP Server/Relay/Client

• DNS Proxy

• Auto PVC configuration

• Per-VC packet level QoS

• Up to 16 VCs

• Web-based management

• Remote configuration and upgrade

• Configuration backup and restoration

• FTP server

• TFTP server

• TR-069

• TR-068

1.2 Application

The following diagram depicts the application of the CT-5621T multi-port router.

1.3 Front Panel LED Indicators

The front panel LED indicators are pictured below. The table that follows provides

detailed explanations of their function.

LED Color Mode Function

POWER

LAN

4x~1x

Green On The router is powered up.

Off The router is powered down.

Red On POST (Power On Self Test) failure (not bootable) or

Device malfunction.

A malfunction is any error of internal sequence or state

that will prevent the device from connecting to the

DSLAM or passing customer data. This may be

identified at various times such after power on or

during operation through the use of self testing or in

operations which result in a unit state that is not

expected or should not occur.

Green On An Ethernet Link is established.

Off An Ethernet Link is not established.

Green Blink Data transmitting or receiving over LAN.

Green On A USB link is established.

USB

ADSL

Off A USB link is not established.

Green Blink Data transmitting or receiving over USB.

Green

Off Modem power off

Blink

DSL good sync

Flashing Green = DSL attempting sync

Flashing at 2 Hz with a 50% duty cycle when trying to

detect carrier signal

Flashing at 4 Hz with a 50% duty cycle when the carrier

has been detected and the modem is trying to train.

Green

On IP connected and no traffic detected.

INTERNET

Green

Red

Off

Blinking

Modem power off, modem in bridged mode or ADSL

connection not present.

IP connected and IP Traffic is passing thru the device

(either direction)

Device attempted to become IP connected and failed

(no DHCP response, no PPPoE response, PPPoE

authentication failed, no IP address from IPCP, etc.)

For bridged mode, the indicator light is off.

If the IP or PPPoE session is dropped due to an idle

timeout, the light will remain green if an ADSL

connection is still present. If the session is dropped for

any other reason, the light is turned off. The light will

turn red when it attempts to reconnect and DHCP or

PPPoE fails.

Chapter 2 Installation

2.1 Hardware Installation

In the rear panel, there is a reset button. To load the factory default settings, hold

the reset button down for at least 5 seconds.

Follow the instructions below to complete the hardware connections.

Connection to LINE port

If you wish to connect both the router and a telephone, connect the LINE port to a

POTS splitter with a RJ11 connection cable.

Power button

Reset button

Connection to LAN port

To connect to a hub or PC, use a RJ45 cable. You can connect the router to up to

four LAN devices. The ports are auto-sensing MDI/X and either straight-through

cable or crossover cable can be used.

Connection to USB port

Connect the USB port to a PC with a standard USB cable.

Connection to Power

Connect the Power jack to the shipped power cord. Attach the power adapter to

the wall outlet or other AC source. After all connections have been made, press the

power-switch in to turn the device on. After power on, the router performs a

self-test. Wait for a few seconds until the test is finished, then the router will be

ready to operate.

Caution 1: If the router fails to power up, or it malfunctions, first verify that the

power supply is connected correctly. Then power it on again. If the

problem persists, contact our technical support engineers.

Caution 2: Before servicing or disassembling this equipment always disconnect all

power cords and telephone lines from the wall outlet.

2.2 USB Device Driver Auto-run Installation

Before you connect your router’s USB cable to your PC, you must load the ADSL

USB drivers. The auto-run USB driver installation supports Win ME, Win 98, Win

2000, Win XP (32 bit) and Vista (32 bit). For those using Windows XP 64 bit, the

driver needs to be installed manually (please see section 2.3 below for details), and

the driver is also enclosed on the CD-ROM.

To connect the router to a PC using the USB interface, you need to use a standard

USB cable and install the USB interface software. Follow the steps below:

STEP 1: Insert the Installation disk and select the Install USB Driver option.

STEP 2: The following screen will be displayed. Click the Next button to continue.

STEP 3: When the screen displays as below, wait until the drivers are fully

installed.

STEP 4: Click the Finish button, when the screen displays as below.

STEP 5: Installation is complete.

2.3 USB Driver Manual Installation (64bit OS)

Before you connect your router’s USB cable to your PC, you must load the ADSL

USB drivers. This manual USB driver installation supports Windows XP 64 bit.

To connect the router to a PC using the USB interface, you need to use a standard

USB cable and install the USB interface software. Follow the steps below:

STEP 1: Connect the USB router to the PC by plugging the flat connector of a

standard USB cable into your PC, and plugging the square connector into

the router. The screen will display as below:

STEP 2: When the screen displays as below, select install from a list of specific

location (Advanced) and click the Next button.

Note: This screen won’t be displayed if the USB Driver has been previously

un/installed.

STEP 3: If you are installing the software from a disk, insert the disk.

Note: When the auto-run screen pops up click Exit and continue with the manual

installation process (see below).

STEP 4: Select the location of the file using the Browse button. Normally, the file

is on the CD-ROM shipped with the device.

STEP 5: Locate the Vista folder, and click the OK button.

STEP 6: When the screen displays as below, click the NEXT button.

STEP 7: Click the Finish button, when the screen displays as below.

STEP 8: Installation is complete.

Chapter 3 Login via the Web Browser

You can use a web browser, such as Microsoft Internet Explorer, to access the

device remotely. The web-based user interface is best viewed with Microsoft

Internet Explorer (version 5.0 and later).

The default user account is assigned with user name root and password 12345.

The user can change the default password later when logged in to the device.

3.1 IP Address

The default IP address of the CT-5621T (LAN port) is 192.168.1.1. To configure

the CT-5621T for the first time, the configuration PC must have a static IP address

within the 192.168.1.x subnet. Follow the steps below to configure your PC IP

address to use subnet 192.168.1.x.

STEP 1: Right click on the Local Area Connection under the Network and Dial-Up

connection window and select Properties.

STEP 2: Enter the TCP/IP screen and change the IP address to the domain of

192.168.1.x/24.

STEP 3: Click OK to submit the settings.

STEP 4: Start your Internet browser and type the IP address for the router

(192.168.1.1) in the Web address bar.

3.2 Login Procedure

Perform the following steps to bring up the Web user interface and configure the

CT-5621T. To log on to the system from the Web browser, follow the steps below:

STEP 1: Start your Internet browser. Type the IP address for the router in the Web

address field. For example, if the IP address is 192.168.1.1,

type http://192.168.1.1

STEP 2: You will be prompted to enter your user name and password. Type root

in the user name and 12345 in the password field, and click OK. These

values can be changed later in the Web User Interface by selecting the

Management link.

STEP 3: After successfully logging in, you will reach the Quick Setup menu.

Shown here is the Device Info screen for your reference.

3.3 Default Settings

During power on initialization, the CT-5621T initializes all configuration attributes

to default values. It will then read the configuration profile from the Permanent

Storage section on the flash memory. The default attributes are overridden when

identical attributes with different values are configured. The configuration profile

in Permanent Storage can be created via the Web user interface, telnet user

interface, or other management protocols. The factory default configuration can be

restored either by pushing the reset button for more than five seconds, or by

clicking the Restore Default Configuration option in the Restore Settings screen.

The following default settings are present when setting up the router for the first

time. The PC running the browser can be attached to the Ethernet.

z LAN port IP address: 192.168.1.1 z Local administrator account name: root z Local administrator account password: 12345 z Local non- administrator account name: user z Local non- administrator account password: user z Remote WAN access: disabled z Remote WAN access account name: support z Remote WAN access account password: support z NAT and firewall: enabled z DHCP server on LAN interface: enabled z WAN IP address: none

Chapter 4 Device Info

After login, the Quick Setup screen appears as shown.

Note: The selections available on the left side of menu are based upon the first

configured connection and default user access settings.

4.1 WAN

Click Device Info on the menu bar to display the WAN option. Then, click WAN on

the Device Info menu bar to display the configured PVC(s) and the status.

VPI/VCI Shows the values of the ATM VPI/VCI

Con. ID Shows the connection ID

Category Shows the ATM service classes

Service Shows the name for WAN connection

Interface Shows connection interfaces

Protocol Shows the connection type, such as PPPoE, PPPoA, etc.

IGMP Shows the state of the IGMP function

Nat Shows if the Network Address Translation (NAT) is enabled or disabled.

QoS Shows if IGMP IP QoS is enabled or disabled

State Shows the connection state of the WAN connection

Status Lists the status of DSL link

IP Address Shows IP address for WAN interface

4.2 Statistics

This menu option provides information on LAN, WAN, ATM and ADSL connections.

Note: These statistics are updated every 15 seconds.

4.2.1 LAN Statistics

The LAN Statistics screen shows byte transfer, packet transfer, Error and Drop

statistics for each LAN interface (Ethernet and USB).

4.2.2 WAN Statistics

Service Shows the service type

VPI/VCI Shows the values of the ATM VPI/VCI

Protocol Shows the connection type, such as PPPoE, PPPoA, etc.

Interface Shows connection interfaces

Received/Transmitted

- Bytes

- Pkts

- Errs

- Drops

Number of Bytes Received/Transmitted

Number of packets Received/Transmitted

Number of errored packets Received/Transmitted

Number of dropped packets Received/Transmitted

4.2.3 ATM statistics

The following figure shows the ATM statistics screen.

ATM Interface Statistics

Field Description

In Octets Number of received octets over the interface

Out Octets Number of transmitted octets over the interface

In Errors Number of cells dropped due to uncorrectable HEC errors

In Unknown Number of received cells discarded during cell header

validation, including cells with unrecognized VPI/VCI

values, and cells with invalid cell header patterns. If

cells with undefined PTI values are discarded, they are

also counted here.

In Hec Errors Number of cells received with an ATM Cell Header HEC

error

In Invalid Vpi Vci Errors Number of cells received with an unregistered VCC

address

In Port Not Enable Errors Number of cells received on a port that has not been

enabled

In PTI Errors Number of cells received with an ATM header Payload

Type Indicator (PTI) error

In Idle Cells Number of idle cells received

In Circuit Type Errors Number of cells received with an illegal circuit type

In Oam RM CRC Errors Number of OAM and RM cells received with CRC errors

In GFC Errors Number of cells received with a non-zero GFC

AAL5 Interface Statistics

Field Description

In Octets Number of received AAL5/AAL0 CPCS PDU octets

Out Octets Number of AAL5/AAL0 CPCS PDU octets transmitted

In Ucast Pkts Number of received AAL5/AAL0 CPCS PDU passed to a

higher-layer

Out Ucast Pkts Number of received AAL5/AAL0 CPCS PDU received from a

higher layer for transmission

In Errors Number of received AAL5/AAL0 CPCS PDU in error. The types

of errors counted include CRC-32 errors.

Out Errors Number of received AAL5/AAL0 CPCS PDU that could not be

transmitted due to errors.

In Discards Number of received AAL5/AAL0 CPCS PDU discarded due to an

input buffer overflow condition.

Out Discards This field is not currently used

AAL5 VCC ST ATISTICS

Field Description

VPI/VCI Shows the values of the ATM VPI/VCI

CRC Errors Number of PDUs received with CRC-32 errors

SAR TimeOuts Number of partially re-assembled PDUs which were discarded

because they were not fully re-assembled within the required

period of time. If the re-assembly time is not supported

then, this object contains a zero value.

Over Sized SDUs Number of PDUs discarded because the corresponding SDU

was too large

Short Packets Errors Number of PDUs discarded because the PDU length was less

than the size of the AAL5 trailer

Length Errors Number of PDUs discarded because the PDU length did not

match the length in the AAL5 trailer

4.2.4 ADSL Statistics

The following figure shows the ADSL Network Statistics screen. Within the ADSL

Statistics window, a bit Error Rate Test can be started using the ADSL BER Test

button. The Reset button resets the statistics.

Field Description

Mode Line Coding format, that can be selected G.dmt, G.lite,

T1.413, ADSL2

Type Channel type Interleave or Fast

Line Coding Trellis On/Off

Status Lists the status of the DSL link

Link Power State Link output power state.

SNR Margin (dB) Signal to Noise Ratio (SNR) margin

Attenuation (dB) Estimate of average loop attenuation in the downstream

direction.

Output Power (dBm) Total upstream output power

Attainable Rate (Kbps) The sync rate you would obtain.

Rate (Kbps) Current sync rate.

Super Frames Total number of super frames

Super Frame Errors Number of super frames received with errors

RS Words Total number of Reed-Solomon code errors

RS Correctable Errors Total Number of RS with correctable errors

RS Uncorrectable Errors Total Number of RS words with uncorrectable errors

HEC Errors Total Number of Header Error Checksum errors

OCD Errors Total Number of out-of-cell Delineation errors

LCD Errors Total number of Loss of Cell Delineation

Total ES: Total Number of Errored Seconds

Total SES: Total Number of Severely Errored Seconds

Total UAS: Total Number of Unavailable Seconds

4.2.5 Route

Choose Route to display the routes that the route information has learned.

4.2.6 ARP

Click ARP to display the ARP information.

4.2.7 DHCP

Click DHCP to display the DHCP information.

Chapter 5 Quick Setup

The Quick Setup allows the user to configure the ADSL router for DSL connectivity

and Internet access. It also guides the user though the WAN network setup first

and then the LAN interface setup. You can either manually customize the router

or follow the online instruction to set up the router.

The CT-5621T ADSL router supports the following five network operating modes

over an ATM PVC WAN interface.

z PPP over Ethernet (PPPoE) z PPP over ATM (PPPoA) z MAC Encapsulated Routing (MER) z IP over ATM (IPoA) z Bridging

The following configuration considerations apply:

z The WAN network operating mode operation depends on the service

provider’s configuration on the Central Office side and Broadband Access

Server for the PVC

z If the service provider provides PPPoE service, then the connection selection

depends on whether the LAN-side device (typically a PC) is running a PPPoE

client or whether the CT-5621T is to run the PPPoE client. The CT-5621T can

support both cases simultaneously.

z If some or none of the LAN-side devices do not run PPPoE client, then select

PPPoE. If every LAN-side device is running a PPPoE client, then select Bridge

In PPPoE mode, CT-5621T also supports pass-through PPPoE sessions from

the LAN side while simultaneously running a PPPoE client fro non-PPPoE LAN

devices. NAT and firewall are always enabled when PPPoE mode is selected,

but they can be enabled or disabled by the user when MER or IPoA is selected,

NAT and firewall are always disabled when Bridge mode is selected.

z Depending on the network operating mode, and whether NAPT and firewall

are enabled or disabled, the main panel will display or hide the NAPT/Firewall

menu. For instance, at initial setup, the default network operating mode is

Bridge. The main panel will not show the NAPT and Firewall menu.

Note: Up to sixteen PVC profiles can be configured and saved on the flash memory.

To activate a particular PVC profile, you need to navigate all the Quick Setup pages

until the last summary page, then click on the Finish button and reboot the system.

5.1 Auto Quick Setup

The auto quick setup requires the ADSL link to be up. The ADSL router will

automatically detect the PVC. You only need to follow the online instructions that

you are prompted.

1. Select Quick Setup to display the DSL Quick Setup screen.

2. Click Next to start the setup process. Follow the online instructions to complete

the setting. This procedure will skip some processes like PVC index, or

encapsulation.

3. After the settings are complete, you can use the ADSL service.

5.2 Manual Quick Setup

STEP 1: Click Quick Setup and un-tick the DSL Auto-connect checkbox to

enable manual configuration of the connection type.

Un-tick this checkbox to enable manual setup and display

the following screen.

STEP 2: Enter the Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI).

Select Enable Quality Of Service if required. Click Next.

STEP 3: Choosing different connection types pops up different settings requests.

Enter appropriate settings that are requested by your service provider.

The following descriptions state each connection type setup separately.

Select Enable 802.1q (by ticking the box) if required, and input a

number for the VLAN ID. Click on “Next” to go to next step.

5.2.1 PPP over ATM (PPPoA) and PPP over Ethernet (PPPoE)

1. Select the PPP over ATM (PPPoA) or PPP over Ethernet (PPPoE) radio

button and click Next. The following screen appears:

PPP USERNAME/PPP PASSWORD

Give “PPP Username”, “PPP Password” and “PPPoE Service Name”, and then select

the “Authentication Method” (AUTO/PAP/CHAP/MSCHAP). Please contact your ISP

for the information. The WEB user interface allows a maximum of 256 characters in

the PPP user name and a maximum of 32 characters in PPP password.

Encapsulation Mode

Choosing different connection types provides different encapsulation modes.

z PPPoA- VC/MUX, LLC/ENCAPSULATION z PPPoE- LLC/SNAP BRIDGING, VC/MUX z MER- LLC/SNAP-BRIDGING, VC/MUX z IPoA- LLC/SNAP-ROUTING, VC MUX z Bridging- LLC/SNAP-BRIDGING, VC/MUX

Disconnect if no activity

The CT-5621T can be configured to disconnect if there is no activity for a period of

time by selecting the Dial on demand check box. When the checkbox is ticked,

you need to enter the inactivity timeout period. The timeout period ranges from 1

minute to 4320 minutes.

PPP IP Extension

The PPP IP Extension is a special feature deployed by some service providers.

Unless your service provider specially requires this setup, do not select it.

The PPP IP Extension supports the following conditions:

z Allows only one PC on the LAN z The public IP address assigned by the remote side using the PPP/IPCP protocol

is actually not used on the WAN PPP interface. Instead, it is forwarded to the

LAN interface through DHCP. Only one PC on the LAN can be connected to

the remote, since the DHCP server within the ADSL router has a single IP

address to assign to a LAN device.

z NAPT and firewall are disabled when this option is selected. z The ADSL router becomes the default gateway and DNS server to the PC

through DHCP using the LAN interface IP address.

z The ADSL router extends the IP subnet at the remote service provider to the

LAN PC. That is, the PC becomes a host belonging to the same IP subnet.

z The ADSL router bridges the IP packets between WAN and LAN ports, unless

the packet is addressed to the router’s LAN IP address.

Use Static IP Address

Unless your service provider specially requires this setup, do not select it.

If selected, enter your static IP address.

Enable PPP Debug Mode

Enable the PPPoE debug mode. The system will put more PPP connection

information in System Log. But this is for debug, please don't enable in normal

usage.

2. Click Next to display the screen on the following page.

Enable IGMP Multicast checkbox: Tick the checkbox to enable IGMP multicast

(proxy). IGMP (Internet Group Membership Protocol) is a protocol used by IP

hosts to report their multicast group memberships to any immediately neighboring

multicast routers.

Enable WAN Service checkbox: Tick this item to enable the ATM service.

Untick it to stop the ATM service.

Service Name: This is user-defined.

3. After entering your settings, select Next. The following screen appears. This

page allows the user to configure the LAN interface IP address, subnet mask and

DHCP server. If the user would like this ADSL router to assign dynamic IP address,

DNS server and default gateways to other LAN devices, select the button Enable

DHCP server on the LAN to enter the starting IP address and end IP address and

DHCP leased time.

The Device Setup page allows the user to configure the LAN interface IP address

and DHCP server. If the user would like this ADSL router to assign dynamic IP

addresses, DNS server and default gateway to other LAN devices, select the radio

box Enable DHCP server on the LAN to enter the starting IP address and end IP

address and DHCP lease time. This configures the router to automatically assign

IP addresses, default gateway address and DNS server addresses to each of your

PCs.

Note 1: Enable DHCP Server Relay will not display if Firewall is enabled in the

previous step.

Note 2: The router’s default IP address is 192.168.1.1 and the default private

address range provided by the ISP server in the router is 192.168.1.2

through 192.168.1.254.

4. Click Next to display the WAN Setup-Summary screen that presents the entire

configuration summary.

• Click Save/Reboot if the settings are correct.

• Click Back if you wish to modify the settings.

5. After clicking Save/Reboot, the router will save the configuration to the flash

memory, and reboot. The Web UI will not respond until the system is brought up

again. After the system is up, the Web UI will refresh to the Device Info page

automatically. The CT-5621T is ready for operation and the front panel LED

indicators will display as described in section 1.3.

5.2.2 MAC Encapsulation Routing (MER)

To configure MER, do the following.

1. Select Quick Setup and click Next.

2. Enter the PVC Index provided by the ISP and click Next.

3. Select the MAC Encapsulation Routing (MER) radio button, and click Next. The

following screen appears.

Enter information provided to you by your ISP to configure the WAN IP settings.

Notice: DHCP can be enabled for PVC in MER mode if Obtain an IP address

automatically is chosen. Changing the default gateway or the DNS effects the

whole system. Configuring them with static values will disable the automatic

assignment from DHCP or other WAN connection.

If you configure static default gateway over this PVC in MER mode, you must enter

the IP address of the remote gateway in the “Use IP address”. The “Use WAN

interface” is optional.

The ISP should provide the values that must be entered in the entry fields.

4. Click Next to display the following screen.

Enable NAT checkbox: If the LAN is configured with a private IP address, the

user should select this checkbox. The NAT submenu on the left side main panel

will be displayed after reboot. The user can then configure NAT-related features

after the system comes up. If a private IP address is not used on the LAN side,

this checkbox should be de-selected to free up system resources for better

performance. When the system comes back after reboot, the NAT submenu will

not be displayed on the left main panel.

Enable Firewall checkbox: If the firewall checkbox is selected, the Security

submenu on the left side main panel will be displayed after system reboot. The

user can then configure firewall features after the system comes up. If firewall is

not used, this checkbox should be de-selected to free up system resources for

better performance. When system comes back after reboot, the Security

submenu will not be displayed on the left main panel.

Enable IGMP Multicast: Tick the checkbox to enable IGMP multicast (proxy).

IGMP (Internet Group Membership Protocol) is a protocol used by IP hosts to report

their multicast group memberships to any immediately neighboring multicast

routers.

Enable WAN Service: Tick the checkbox to enable the WAN service. If this item

is not selected, you will not be able to use the WAN service.

Service Name: This is User-defined.

5. Upon completion, click Next. The following screen appears. The WAN

Setup-Summary screen presents the entire configuration summary.

• Click Save/Reboot if the settings are correct.

• Click Back if you wish to modify the settings.

After clicking Save/Reboot, the router will save the configuration to the flash

memory, and reboot. The Web UI will not respond until the system is brought up

again. After the system is up, the Web UI will refresh to the Device Info page

automatically. The CT-5621T is ready for operation and the front panel LED

indicators will display as described in section 1.3.

5.2.3 IP Over ATM

To configure IP Over ATM,

1. Select Quick Setup and click Next.

2. Enter the PVC Index and click Next.

3. Type the VPI and VCI values provided by the ISP and click Next.

4. Select the IP over ATM (IPoA) radio button and click Next.

The following screen will appear.

Notice that DHCP is not supported over IPoA. The user must enter the IP address

or WAN interface for the default gateway setup, and the DNS server addresses

provided by the ISP.

5. Click Next. The following screen appears.

Enable NAT checkbox

If the LAN is configured with a private IP address, the user should select this

checkbox. The NAT submenu on the left side main panel will be displayed after

reboot. The user can then configure NAT-related features after the system comes

up. If a private IP address is not used on the LAN side (i.e. the LAN side is using

a public IP), this checkbox should be de-selected. When the system comes back

after reboot, the NAT submenu will not be displayed on the left main panel.

Enable Firewall checkbox

If the firewall checkbox is selected, the Security submenu on the left side main

panel will be displayed after system reboot. The user can then configure firewall

features after the system comes up. If firewall is not used, this checkbox should

be de-selected to free up system resources for better performance. When system

comes back after reboot, the Security submenu will not be displayed on the left

main panel.

6. Click Next to display the following screen. The Device Setup page allows the

user to configure the LAN interface IP address and DHCP server if the user would

like this ADSL router to assign dynamic IP addresses, DNS server and default

gateway to other LAN devices. Select the button Enable DHCP server on the LAN to

enter the starting IP address and end IP address and DHCP lease time.

The user must configure the IP Address and the Subnet Mask. To use the DHCP

service on the LAN, select the Enable DHCP server checkbox, and enter the Start

IP addresses, the End IP address and DHCP lease time. This configures the router

to automatically assign IP addresses, default gateway address and DNS server

addresses to each of your PCs.

Note 1: Enable DHCP Server Relay will not display if Firewall is enabled in the

previous step.

Note 2: The router’s default IP address is 192.168.1.1 and the default private

address range provided by the ISP server in the router is 192.168.1.2 through

192.168.1.254.

7. Click the Next button to continue. The following screen will be displayed.

8. After clicking Save/Reboot, the router will save the configuration to the flash

memory, and reboot. The Web UI will not respond until the system is brought up

again. After the system is up, the Web UI will refresh to the Device Info page

automatically. The CT-5621T is ready for operation and the front panel LED

indicators will display as described in section 1.3.

5.2.4 Bridging

Select the bridging mode. To configure Bridging, do the following.

1. Select Quick Setup and click Next.

2. Enter the PVC Index and click Next.

3. Type in the VPI and VCI values provided by the ISP and click Next.

4. Select the Bridging radio button and click Next. The following screen appears.

To use the bridge service, tick the checkbox, Enable Bridge Service, and enter

the service name.

5. Click the Next button to continue. Enter the IP address for the LAN interface.

The default IP address is 192.168.1.1. The LAN IP interface in bridge operating

mode is needed for local users to manage the ADSL router. Notice that there is no

IP address for the WAN interface in bridge mode, and the remote technical support

cannot access the ADSL router.

6. Click the Next button to continue. The following screen will be displayed.

The WAN Setup-Summary screen presents the entire configuration summary.

Click Save/Reboot if the settings are correct. Click Back if you wish to modify

the settings.

Chapter 6 Advanced Setup

This chapter explains: WAN, LAN, Routing, DSL and Port Mapping……

Note: Shown below for your reference are the available menu options for each

different configuration.

This screenshot is for Mer and IPoA encapsulations.

This screenshot is for PPPoE and PPPoA encapsulations.

This screenshot is for Bridge encapsulation.

6.1 WAN

VlanID

Please reference Section 4.1 for further information.

• This function means one can add an 802.1Q VLAN tag on

PPPoE/MER or Bridge mode.

It means the packets are sent to WAN and a specific VlanID

(802.1Q tag) will be added in the Ethernet header. The VlanID

shows which 802.1Q tag will be added.

6.2 LAN

Configure the DSL Router IP Address and Subnet Mask for LAN interface. Save

button only saves the LAN configuration data. Save/Reboot button saves the LAN

configuration data and reboots the router to make the new configuration effective.

IP Address: Enter the IP address for the LAN port.

Subnet Mask: Enter the subnet mask for the LAN port.

Enable IGMP Snooping: Enable /Disable the function that is IGMP Snooping.

Standard Mode: In standard mode, as in all prior releases, multicast traffic will

flood to all bridge ports when there is no client subscribes to any multicast group –

even when IGMP snooping is enabled.

Blocking Mode: In blocking mode, the multicast data traffic will be blocked and

not flood to all bridge ports when there is no client subscription to any multicast

group.

To configure a secondary IP address for the LAN port, click the box as shown below.

IP Address: Enter the secondary IP address for the LAN port.

Subnet Mask: Enter the secondary subnet mask for the LAN port.

6.3 NAT

To display the NAT function, you need to enable the NAT feature in the WAN Setup.

6.3.1 Virtual Servers

Virtual Server allows you to direct incoming traffic from WAN side (identified by

Protocol and External port) to the Internal server with private IP address on the

LAN side. The Internal port is required only if the external port needs to be

converted to a different port number used by the server on the LAN side. A

maximum 32 entries can be configured.

To add a Virtual Server, simply click the Add button. The following will be

displayed.

Select a Service

Custom Server

User should select the service from the list.

User can enter the name of their choice.

Server IP Address Enter the IP address for the server.

External Port Start Enter the starting external port number (when you select

Custom Server). When a service is selected the port ranges

are automatically configured.

External Port End Enter the ending external port number (when you select

Custom Server). When a service is selected the port ranges

are automatically configured.

Protocol User can select from: TCP, TCP/UDP or UDP.

Internal Port Start Enter the internal port starting number (when you select

Custom Server). When a service is selected the port ranges

are automatically configured

Internal Port End Enter the internal port ending number (when you select

Custom Server). When a service is selected the port ranges

are automatically configured.

6.3.2 Port Triggering

Some applications require that specific ports in the Router’s firewall be opened for

access by the remote parties. Port Trigger dynamically opens up the ‘Open Ports’ in

the firewall when an application on the LAN initiates a TCP/UDP connection to a

remote party using the ‘Triggering Ports’. The Router allows the remote party from

the WAN side to establish new connections back to the application on the LAN side

using the ‘Open Ports’. A maximum 32 entries can be configured.

To add a Trigger Port, simply click the Add button. The following will be displayed.

Select an Application

User should select the application from the list.

Or Custom Application

Trigger Port Start Enter the starting trigger port number (when you select

Trigger Port End Enter the ending trigger port number (when you select

Trigger Protocol User can select from: TCP, TCP/UDP or UDP.

Open Port Start Enter the starting open port number (when you select

Open Port End Enter the ending open port number (when you select

Open Protocol User can select from: TCP, TCP/UDP or UDP.

Or User can enter the name of their choice.

custom application). When an application is selected the

port ranges are automatically configured.

custom application). When an application is selected the

port ranges are automatically configured.

custom application). When an application is selected the

port ranges are automatically configured.

custom application). When an application is selected the

port ranges are automatically configured.

6.3.3 DMZ Host

The DSL router will forward IP packets from the WAN that do not belong to any of

the applications configured in the Virtual Servers table to the DMZ host computer.

Enter the computer’s IP address and click “Apply” to activate the DMZ host.

Clear the IP address field and click “Apply” to deactivate the DMZ host.

6.3.4 ALG

SIP ALG is Application layer gateway. If the user has an IP phone(SIP) or VoIP

gateway(SIP) behind the ADSL router, the SIP ALG can help VoIP packet

passthrough the router (NAT enabled).

Note: SIP (Session Initiation Protocol, RFC3261) is the protocol of choice for most

VoIP (Voice over IP) phones to initiate communication. This ALG is only valid for SIP

protocol running on UDP port 5060.

6.4 Security

To display the Security function, you need to enable the firewall feature in the WAN

Setup.

6.4.1 IP Filtering

IP filtering allows you to create a filter rule to identify outgoing/incoming IP traffic

by specifying a new filter name and at least one condition below. All of the specified

conditions in this filter rule must be satisfied for the rule to take effect. Click

‘Save/Apply’ to save and activate the filter.

Outgoing

Note: The default setting for Outgoing is Accepted.

To add a filtering rule, simply click the Add button. The following screen will be

displayed.

Filter Name Type a name for the filter rule.

Protocol User can select from: TCP, TCP/UDP, UDP or

ICMP.

Source IP address Enter source IP address.

Source Subnet Mask Enter source subnet mask.

Source Port (port or port:port) Enter source port number.

Destination IP address Enter destination IP address.

Destination Subnet Mask Enter destination subnet mask.

Destination port (port or port:port) Enter destination port number.

Incoming

Note: The default setting for Incoming is Blocked.

To add a filtering rule, simply click the Add button. The following screen will be

displayed.

To configure the parameters, please reference Outgoing

table above.

6.4.2 Parental Control

Parental control: allows parents, schools, and libraries to set access times for

Internet use.

To add a parental control, simply click the Add button.

The following screen will be displayed.

Username: Input Internet access user name

MAC: Set the MAC address to access the Internet

Mon, Tue, Wed, Thu, Fri, Sat, Sun: Set which days that will have block

restrictions to Internet access

Start, End Blocking Time: Set Internet block start and stop time

6.4.3 MAC Filtering

Mac Filtering is only available when Bridging PVC is configured.

Each network device has a unique MAC address. You can block or forward the

packets based on the MAC addresses. The MAC Filtering Setup screen allows

setting up the MAC filtering policy and the MAC filtering rules. MAC Filtering is only

effective on ATM PVCs configured in Bridge mode.

The policy FORWARDED means that all MAC layer frames will be FORWARDED

except those matching with any of the specified rules in the following table.

BLOCKED means that all MAC layer frames will be BLOCKED except those

matching with any of the specified rules in the following table. The default is

FORWARD; you change by clicking the Change Policy button.

Choose Add or Remove to configure MAC filtering rules. The following screen

pops up when you click Add. Create a filter to identify the MAC layer frames by

specifying at least one condition below. If multiple conditions are specified, all of

them take effect. Click Apply to save and activate the filter.

Option Description

Protocol type PPPoE, IPv4, IPv6, AppleTalk, IPX, NetBEUI, IGMP

Destination MAC Address Define the destination MAC address

Source MAC Address Define the source MAC address

Frame Direction: Select a direction of the frame

WAN Interface Selects the interface that the MAC filter rule(s) will be

applied. Only the WAN interface that is configured for

bridged can be selected.

6.5 Quality of Service

To display the QoS function, you need to enable the QoS feature in the WAN Setup.

Choose Add to configure network traffic classes. The following screen will be

displayed:

Traffic Class Name Enter name for traffic class.

Assign ATM Transmit Priority Select Low, Medium or High.

Mark IP Precedence Select between 0-7. The lower the digit

shows the higher the priority.

Mark IP Type Of Service Select either: Normal Service, Minimize

Cost, Maximize Reliability, Maximize

Throughput, Minimize Delay

Mark 802.1p if 802.1q is enabled on WAN Select between 0-7. The higher the

digit shows the higher the priority.

SET-1

Physical LAN Port Select between ENET(1-4) and USB

Protocol User can select from: TCP, TCP/UDP,

UDP or ICMP.

Source IP Address Enter the source IP address.

Source Subnet Mask Enter the subnet mask for the source IP

address.

Source Port (port or port:port) Enter source port number or port

range.

Destination IP address Enter destination IP address.

Destination Subnet Mask Enter destination subnet mask.

Destination port (port or port:port) Enter destination port number or port

range.

SET-2

802.1p Priority Select between 0-7. The lower the digit

shows the higher the priority

If the Enable Differentiated Service Configuration box is ticked (i.e. selected)

the following screen will be displayed:

The additional Items are explained here.

Assign Differentiated Services

Code Point (DSCP) Mark

The selected Code Point gives the

corresponding priority to the packets that

satisfies the rules set below.

Source MAC Address A packet belongs to SET-1, if a binary-AND of

its source MAC address with the Source MAC

Mask is equal to the binary-AND of the

Source MAC Mask and this field.

Source MAC Mask This is the mask used to decide how many

bits are checked in Source MAC Address.

Destination MAC Address A packet belongs to SET-1 then the result

that the Destination MAC Address of its

header binary-AND to the Destination MAC

Mask must equal to the result that this field

binary-AND to the Destination MAC Mask.

Destination MAC Mask This is the mask used to decide how many

bits are checked in Destination MAC Address.

6.6 Routing

The Routing dialog box allows you to configure Default gateway, Static Route and

RIP.

6.6.1 Default Gateway

If ‘Enable Automatic Assigned Default Gateway’ checkbox is selected, this

router will accept the first received default gateway assignment from one of the

PPPoA, PPPoE or MER/DHCP enabled PVC(s). If the checkbox is not selected, enter

the static default gateway AND/OR a WAN interface. Click ‘Save/Apply’ button to

save it.

NOTE: If changing the Automatic Assigned Default Gateway from unselected to

selected, You must reboot the router to get the automatic assigned default gateway.

6.6.2 Static Route

Choose Static Route to display the Static Route screen. The Static Route screen

lists the configured static routes, and allows configuring static routes. Choose Add

or Remove to configure the static routes.

To add static route, click the Add button to display the following screen. Enter the

destination network address, subnet mask, gateway AND/OR available WAN

interface then click Save/Apply to add the entry to the routing table.

6.6.3 RIP

To activate RIP for the device, select the 'Enabled' radio button for Global RIP Mode.

To configure an individual interface, select the desired RIP version and operation,

followed by placing a check in the 'Enabled' checkbox for the interface. Click the

'Save/Apply' button to save the configuration, and to start or stop RIP based on the

Global RIP mode selected.

6.7 DNS

6.7.1 DNS Server

If 'Enable Automatic Assigned DNS' checkbox is selected, this router will accept the

first received DNS assignment from one of the PPPoA, PPPoE or MER/DHCP enabled

PVC(s) during the connection establishment. If the checkbox is not selected, enter

the primary and optional secondary DNS server IP addresses. Click 'Save' button to

save the new configuration. You must reboot the router to make the new

configuration effective.

6.7.2 Dynamic DNS

The Dynamic DNS service allows you to alias a dynamic IP address to a static

hostname in any of the many domains, allowing your DSL router to be more easily

accessed from various locations on the Internet.

To add a dynamic DNS service, simply click the Add button.

The following screen will be displayed:

D-DNS provider Select a dynamic DNS provider from the list.

Hostname Enter the name for the dynamic DNS server.

Interface Select the interface from the list.

Username Enter the username for the dynamic DNS server.

Password Enter the password for the dynamic DNS server.

6.8 DSL

To access the DSL settings, first click On Advanced Setup and then click on DSL.

The DSL Settings dialog box allows you to select an appropriate modulation mode.

Option Description

G.dmt Enabled Sets G.Dmt if you want the system to use G.Dmt mode.

G.Lite Enabled Sets G.Lite if you want the system to use G.Lite mode.

T1.413 Enabled Sets the T1.413 if you want the system to use only T1.413

mode.

ADSL2 Enabled The device can support the functions of the ADSL2.

AnnexL Enabled The device can support/enhance the long loop test.

ADSL2+ Enabled The device can support the functions of the ADSL2+.

AnnexM ENABLED Covers a higher “upstream” data rate version, by making use of

some of the downstream channels.

Inner Pair Reserved only

Outer Pair Reserved only

Bitswap Enable Allows bitswapping function

SRA Enable Allows seamless rate adaptation

6.9 Port Mapping

Port Mapping supports multiple port to PVC and bridging groups. Each group will

perform as an independent network. To support this feature, you must create

mapping groups with appropriate LAN and WAN interfaces using the Add button.

The Remove button will remove the grouping and add the ungrouped interfaces to

the Default group.

As shown below, when you tick the Enable virtual ports on, all of the LAN interfaces

will be grouped together as a default.

To add a port mapping group, simply click the Add button.

To create a group from the list, first enter the group name and then select from the

available interfaces on the list.

Automatically Add Clients With the Following DHCP Vendor IDs:

Add support to automatically map LAN interfaces including USB to PVC's using

DHCP vendor ID (option 60). The local DHCP server will decline and send the

requests to a remote DHCP server by mapping the appropriate LAN interface. This

will be turned on when PortMapping is enabled.

There are 4 PVCs (0/33, 0/36, 0/37, 0/38). 0/33 is for PPPoE and the others are for

IP setup-box (video). The LAN interfaces are ETH1, ETH2, ETH3, ETH4 and USB.

Port mapping configuration is:

1. Default: ETH1, ETH2, ETH3, ETH4 and USB.

2. Video: nas_0_36, nas_0_37 and nas_0_38. The DHCP vendor ID is "Video".

The CPE DHCP server is running on "Default". And ISP's DHCP server is running on

PVC 0/36. It is for setup-box use only.

In the LAN side, PC can get IP address from CPE DHCP server and access Internet

via PPPoE (0/33).

If the setup-box was connected with interface "ETH1" and send a DHCP request

with vendor id "Video", CPE DHCP server will forward this request to ISP's DHCP

server.

And CPE will change the port mapping configuration automatically. The port

mapping configuration will become:

1. Default: ETH2, ETH3, ETH4 and USB.

2. Video: nas_0_36, nas_0_37, nas_0_38 and ETH1.

6.10 Certificate

A certificate is a public key, attached with its owner’s information (company name,

server name, personal real name, contact e-mail, postal address, etc) and digital

signatures. There will be one or more digital signatures attached on the certificate,

indicating that these signers have verified that the owner information of this

certificate is correct.

6.10.1 Local

Click Create Certificate Request to generate a certificate signing request. The

certificate signing request can be submitted to the vendor/ISP/ITSP to apply for a

certificate. Some information must be included in the certificate signing request.

Actually, your vendor/ISP/ITSP will ask you to provide the information they require

and to provide the information in the format they regulate. The explanation for

each column in the following table is only for reference.

Certificate Name A user-defined name for the certificate.

Common Name Usually, it is the fully qualified domain name for the

machine.

Organization Name The exact legal name of your organization. Do not

abbreviate.

State/Province Name The state or province where your organization is located. It

cannot be abbreviated.

Country/Region Name The two-letter ISO abbreviation for your country.

Click Apply to generate a private key and a certificate signing request.

This page is used to paste the certificate content and the private key provided by

your vendor/ISP/ITSP.

6.10.2 Trusted CA

CA is the abbreviation for Certificate Authority. CA is a part of the X.509 system. It

is itself a certificate, attached with the owner information of this certificate

authority. But its purpose is not to do encryption/decryption. Its purpose is to sign

and issue certificates; in order to prove the owner information of that certificate is

correct.

Click Import Certificate to paste the certificate content of your trusted CA.

Generally speaking, the certificate content will be provided by your

vendor/ISP/ITSP and is used to authenticate the Auto-Configuration Server (ACS)

that the CPE will connect to.

Chapter 7 Diagnostics

The Diagnostics menu provides feedback on the connection status of the CT-5621T

and the ADSL link. The individual tests are listed below. If a test displays a fail

status, click Rerun Diagnostic Tests at the bottom of this page to make sure the

fail status is consistent. If the test continues to fail, click Help and follow the

troubleshooting procedures.

Test Description

Ethernet

Connection

Pass: indicates that the Ethernet interface from your computer

is connected to the LAN port of your DSL Router. A flashing or

solid green LAN LED on the router also signifies that an

Ethernet connection is present and that this test is successful.

Fail: Indicates that the DSL Router does not detect the

Ethernet interface on your computer.

USB Connection Pass: Indicates that the USB interface from your computer is

connected to router properly.

Down: Indicates that the DSL Router does not detect the

signal from USB interface.

ADSL

Synchronization

Pass: Indicates that the DSL modem has detected a DSL signal

from the telephone company. A solid WAN LED on the router

also indicates the detection of a DSL signal from the telephone

company.

Fail: indicates that the DSL modem does not detect a signal

from the telephone company’s DSL network. The WAN LED

will stop blinking (i.e. training) and the LED will switch off.

Diagnostics screen with a PPPoE configured for your reference.

Chapter 8 Management

The Management section of the CT-5621T supports the following maintenance

functions and processes:

z Settings z System log z TR-069 Client z Internet Time z Access Control z Update software z Save/Reboot

8.1 Settings

The Settings option allows you to back up your settings to a file, retrieve the setting

file, and restore the settings.

8.1.1 Configuration Backup

The Backup option under Management>Settings save your router configurations to

a file on your PC. Click BACKUP Settings in the main window. You will be prompted

to define the location of the backup file to save. After choosing the file location,

click Backup Settings. The file will then be saved to the assigned location.

8.1.2 Update Settings

The Update option under Management>Settings update your router settings using

your saved files.

8.1.3 Restore Default

Clicking the Restore Default Configuration option in the Restore Settings screen

can restore the original factory installed settings.

NOTE 1: This entry has the same effect as the hardware reset-to-default button.

The CT-5621T board hardware and the boot loader support the reset to default

button. If the reset button is continuously pushed for more than 5 seconds, the

boot loader will erase the entire configuration data saved on the flash memory.

NOTE 2: Restoring system settings requires a system reboot. This necessitates

that the current Web UI session be closed and restarted. Before restarting the

connected PC must be configured with a static IP address in the 192.168.1.x subnet

in order to configure the CT-5621T.

Default settings

The CT-5621T default settings are

z LAN port IP= 192.168.1.1, subnet mask = 255.255.255.0 z Local user name: root z Password: 12345 z Remote user name: support z Remote user password: support

After the Restore Default Configuration button is selected, the following screen

appears. Close the DSL Router Configuration window and wait for 2 minutes before

reopening your web browser. If necessary, reconfigure your PC IP address to match

your new configuration.

8.2 System Log

The System Log option under Management>Settings allows you to view the

system events log, or to configure the System Log options. The default setting of

system log is disabled. Follow the steps below to enable and view the system log.

1. Click Configure System Log to display the following screen.

2. Select from the desired Log options described in the following table, and then

click SAVE/Apply.

Option Description

Log Indicates whether the system is currently recording events. The user

can enable or disable event logging. By default, it is disabled. To

enable it, tick Enable and then Apply button.

Log level Allows you to configure the event level and filter out unwanted events

below this level. The events ranging from the highest critical level

“Emergency” down to this configured level will be recorded to the log

buffer on the CT-5621T SDRAM. When the log buffer is full, the newer

event will wrap up to the top of the log buffer and overwrite the old

event. By default, the log level is “Debugging,” which is the lowest

critical level. The following log levels are

z Emergency = system is unusable z Alert = action must be taken immediately z Critical = critical conditions z Error = Error conditions z Warning = normal but significant condition z Notice= normal but insignificant condition z Informational= provides information for reference z Debugging = debug-level messages

Emergency is the most serious event level, whereas Debugging is the

least important. For instance, if the log level is set to Debugging, all

the events from the lowest Debugging level to the most critical level

Emergency level will be recorded. If the log level is set to Error, only

Error and the level above will be logged.

Display

Level

Allows the user to select the logged events and displays on the View

System Log page for events of this level and above to the highest

Emergency level.

Mode Allows you to specify whether events should be stored in the local

memory, or be sent to a remote syslog server, or both simultaneously.

If remote mode is selected, view system log will not be able to display

events saved in the remote syslog server.

When either Remote mode or Both mode is configured, the WEB UI will

prompt the user to enter the Server IP address and Server UDP port.

3. Click View System Log. The results are displayed as follows.

8.3 TR-069 Client

WAN Management Protocol (TR-069) allows an Auto-Configuration Server (ACS) to

perform auto-configuration, provision, collection, and diagnostics to this device.

Option Description

Inform Disable/Enable TR-069 client on the CPE.

Inform Interval The duration in seconds of the interval for which the CPE MUST

attempt to connect with the ACS and call the Inform method.

ACS URL URL for the CPE to connect to the ACS using the CPE WAN

Management Protocol. This parameter MUST be in the form of

a valid HTTP or HTTPS URL. An HTTPS URL indicates that the

ACS supports SSL. The “host” portion of this URL is used by the

CPE for validating the certificate from the ACS when using

certificate-based authentication.

ACS User Name Username used to authenticate the CPE when making a

connection to the ACS using the CPE WAN Management

Protocol. This username is used only for HTTP-based

authentication of the CPE.

ACS Password Password used to authenticate the CPE when making a

connection to the ACS using the CPE WAN Management

Protocol. This password is used only for HTTP-based

authentication of the CPE.

Connection Request Username used to authenticate an ACS making a Connection

User Name Request to the CPE.

Connection Request

Password

Password used to authenticate an ACS making a Connection

Request to the CPE.

Get RPC Methods This method may be used by a CPE or ACS to discover the set

of methods supported by the ACS or CPE it is in communication

with. This list may include both standard TR-069 methods

(those defined in this specification or a subsequent version)

and vendor-specific methods. The receiver of the response

MUST ignore any unrecognized methods. Click this button to

force the CPE to immediately establish a connection to the

ACS.

8.4 Internet Time

The Internet Time option under Management menu bar configures the Modem’s

time. To automatically synchronize with Internet time servers, tick the

corresponding box displayed on the screen. Then click Save/Apply.

8.5 Access Control

The Access Control option under Management menu bar configures the

access-related parameters, including three parts: Services, IP Address, and

Passwords.

8.5.1 Services

The Services option limits or opens the access services over the LAN or WAN.

These services are provided FTP, HTTP, ICMP, SSH (Security Socket Share), TELNET,

and TFTP. Enable the service by checking the item in the corresponding checkbox,

and then click Save/Apply.

Comtrend Corporation CT-5621T User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter 1 Introduction

1.1 Features

1.2 Application

1.3 Front Panel LED Indicators

Chapter 2 Installation

2.1 Hardware Installation

2.2 USB Device Driver Auto-run Installation

2.3 USB Driver Manual Installation (64bit OS)

Chapter 3 Login via the Web Browser

3.1 IP Address

3.2 Login Procedure

3.3 Default Settings

Chapter 4 Device Info

4.1 WAN

4.2 Statistics

4.2.1 LAN Statistics

4.2.2 WAN Statistics

4.2.3 ATM statistics

4.2.4 ADSL Statistics

4.2.5 Route

4.2.6 ARP

4.2.7 DHCP

Chapter 5 Quick Setup

5.1 Auto Quick Setup

5.2 Manual Quick Setup

5.2.1 PPP over ATM (PPPoA) and PPP over Ethernet (PPPoE)

5.2.2 MAC Encapsulation Routing (MER)

5.2.3 IP Over ATM

5.2.4 Bridging

Chapter 6 Advanced Setup

6.1 WAN

6.2 LAN

6.3 NAT

6.3.1 Virtual Servers

6.3.2 Port Triggering

6.3.3 DMZ Host

6.3.4 ALG

6.4 Security

6.4.1 IP Filtering

6.4.2 Parental Control

6.4.3 MAC Filtering

6.5 Quality of Service

6.6 Routing

6.6.1 Default Gateway

6.6.2 Static Route

6.6.3 RIP

6.7 DNS

6.7.1 DNS Server

6.7.2 Dynamic DNS

6.8 DSL

6.9 Port Mapping

6.10 Certificate

6.10.1 Local

6.10.2 Trusted CA

Chapter 7 Diagnostics

Chapter 8 Management

8.1 Settings

8.1.1 Configuration Backup

8.1.2 Update Settings

8.1.3 Restore Default

8.2 System Log

8.3 TR-069 Client

8.4 Internet Time

8.5 Access Control

8.5.1 Services