Netgear LB2120 Manual

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LTE Modem

Model LB2120

User Manual

November 2017 202-11658-02

350 E. Plumeria Drive

San Jose, CA 95134

USA

LTE Modem Model LB2120

Support

Thank you for purchasing this NETGEAR product. You can visit www.netgear.com/support to register your product, get help, access the latest downloads and user manuals, and join our community. We recommend that you use only official NETGEAR support resources.

Conformity

For the current EU Declaration of Conformity, visit http://kb.netgear.com/app/answers/detail/a_id/11621.

Compliance

For regulatory compliance information, visit http://www.netgear.com/about/regulatory.

See the regulatory compliance document before connecting the power supply.

Trademarks

Chapter 1 Introduction and Hardware Overview
Introduction............................................................................................................	7
Supported Mobile Broadband Bands.....................................................................	7
Package Contents..................................................................................................	8
Install the Micro SIM Card......................................................................................	8
Top Panel With Status LEDs................................................................................	11
Back Panel With Ports, Connectors, and Button..................................................	12
Modem Label.......................................................................................................	12
Position the Modem.............................................................................................	13
Optional External Antenna...................................................................................	14
Chapter 2 Get Started
Internet Connection Over Mobile Broadband.......................................................	16
Connect the Modem to a Wireline Broadband Modem........................................	16
Connect a Computer, Switch, Hub, Router, or WiFi Router to the Modem..........	17
Connect a Computer to the LAN Port of the Modem.......................................	17
Connect a Router or WiFi Router to the LAN Port of the Modem....................	17
Access the Modem’s Web Pages for the First Time.............................................	17
Change the Language.........................................................................................	20
Manage Automatic Failover Detection.................................................................	20
Chapter 3 Manage the Modem LAN Settings
Change the LAN Settings....................................................................................	24
Manage Router Mode and Bridge Mode..............................................................	26
Change the DHCP Server Settings......................................................................	27
Disable the DHCP Server....................................................................................	29
Enable the DMZ...................................................................................................	30
Disable VPN Pass-Through.................................................................................	31
Chapter 4 Manage the Mobile Broadband Connection
Manage Mobile Broadband Auto Connect Options..............................................	33
Manually Connect to or Disconnect From the Mobile Broadband Network..........	34
Manage APN Profiles for Mobile Broadband Connections..................................	34
View APN Profiles or Add a Custom APN Profile............................................	35
Select an APN Profile......................................................................................	37
Change an APN Profile...................................................................................	38
Remove an APN Profile..................................................................................	39
Chapter 5 Secure Your Network
Change the Modem Password.............................................................................	41
Manage Port Forwarding for Incoming Traffic.......................................................	41
Enable Port Forwarding and Add a Service or Application.............................	42

LTE Modem Model LB2120

Remove a Service or Application for Port Forwarding.....................................	43
Disable Port Forwarding..................................................................................	44
Manage Port Filtering for Outgoing Traffic............................................................	45
Block Specific Services and Applications From Accessing the Internet and Allow
All Other Services and Applications................................................................	45
Allow Specific Services and Applications to Access the Internet and Block All
Other Services and Applications.....................................................................	47
View Services and Applications on the Blacklist and Remove a Service or
Application From the List.................................................................................	48
View Services and Applications on the Whitelist and Remove a Service or
Application From the List.................................................................................	49
Disable Port Filtering.......................................................................................	50
Manage SIM Card Security..................................................................................	51
Enable SIM Card Security...............................................................................	51
Enter the SIM PIN to Enable the Modem to Connect to the Internet..............	53
Personalize the SIM PIN.................................................................................	54
Disable SIM Card Security..............................................................................	55
Unblock the SIM Card With a PUK..................................................................	57
Chapter 6 Manage the Modem and Monitor Usage and the Network
Upgrade the Firmware of the Modem..................................................................	60
Back Up and Restore the Modem Settings..........................................................	61
Back Up the Settings.......................................................................................	61
Restore the Settings........................................................................................	62
Return the Modem to Its Factory Default Settings...............................................	62
Use the Reset Button......................................................................................	63
Use the Modem’s Web Pages to Reset the Modem to Factory Defaults.........	63
View Monthly Data and Session Data Usage......................................................	64
Set a Plan Limit for the Data Counter..................................................................	65
Change the Billing Cycle Counter or Reset the Data Counter.............................	66
View Service Provider, Type of Service, and Signal Strength..............................	66
View Account Details and Other Details About Your Modem...............................	68
View Information About the Mobile Broadband Connection.................................	69
Set Up SMS Alert Messages...............................................................................	70
Set the Data Limit for SMS Alert Messages.........................................................	72
View Alerts...........................................................................................................	73
Turn Off the LEDs................................................................................................	74
Chapter 7 Manage SMS Messages
Manage Incoming SMS Messages......................................................................	76
Send an SMS Message.......................................................................................	77
Chapter 8 Frequently Asked Questions
What do I do when I can’t connect a device to the modem?................................	79
What do I do when I can’t access the Internet?...................................................	79
What do I do when the No Signal icon displays?.................................................	79
Why does the Signal Strength LED show only a few bars?.................................	79
Why is the download or upload speed slow?.......................................................	79

LTE Modem Model LB2120

Can I connect multiple LAN devices to the modem?...........................................	80
How do I access the modem’s web pages?.........................................................	80
What do I do if I forget my admin login password?..............................................	80
How do I disconnect from the mobile broadband network?.................................	80
How do I find my computer’s IP address?............................................................	81
How do I find a device’s MAC address?...............................................................	82
How do I find my mobile phone number?.............................................................	84
Where can I find more information?.....................................................................	84
Chapter 9 Alerts and Troubleshooting
Alert Messages....................................................................................................	86
Quick Tips for Troubleshooting.............................................................................	86
Verify Normal Behavior With the LED Bars..........................................................	87
Troubleshoot With the LED Bars..........................................................................	87
Power LED Bar Is Off......................................................................................	87
Power LED Bar Blinks Amber Fast and an Individual Signal and Strength LED
Bar Lights Solid Green....................................................................................	88
LAN LED Is Off................................................................................................	88
You Cannot Log In to the Modem.........................................................................	89
Troubleshoot the Mobile Broadband Internet Connection....................................	89
Obtain an Internet IP Address From Your Service Provider............................	90
Troubleshoot Internet Browsing.......................................................................	90
Changes Not Saved on the Modem’s Web Pages...............................................	90
TCP/IP Network Not Responding........................................................................	91
Test the LAN Path to Your Modem...................................................................	91
Test the Path From Your Computer to a Remote Device.................................	91
Appendix A Default Settings and Specifications
Factory Default Settings.......................................................................................	94
Technical and Environmental Specifications........................................................	95
Appendix B Wall-Mount the Modem
Position Your Modem............................................................................................	98
Mount Your Modem..............................................................................................	99

Introduction and Hardware Overview	1

This manual is for the following NETGEAR® LTE Modem LB2120 models:

•LB2120-100AUS. Data model with one LAN and one WAN Gigabit Ethernet port and with band support for the Australia, New Zealand, and Oceania region.

•LB2120-100EUS. Data model with one LAN and one WAN Gigabit Ethernet port and with band support for the Europe, South Africa, and Middle East region.

•LB2120-100NAS. Data model with one LAN and one WAN Gigabit Ethernet port and with band support for the North America region.

The LTE Modem LB2120 provides two Gigabit Ethernet ports: one LAN port for connection to a router, switch, hub, or computer and one WAN port for connection to a wireline broadband modem in support of automatic failover to mobile broadband if the wireline broadband modem goes down.

This chapter provides an introduction and hardware overview of the LTE Modem LB2120 and contains the following sections:

•Introduction on page 7

•Supported Mobile Broadband Bands on page 7

•Package Contents on page 8

•Install the Micro SIM Card on page 8

•Top Panel With Status LEDs on page 11

•Back Panel With Ports, Connectors, and Button on page 12

•Modem Label on page 12

•Position the Modem on page 13

•Optional External Antenna on page 14

Note For more information about the topics that are covered in this manual, visit the support website at netgear.com/support.

Note Firmware updates with new features and bug fixes are made available from time to time at downloadcenter.netgear.com. You can check for and download new firmware manually. If the features or behavior of your product does not match what is described in this guide, you might need to update your firmware.

LTE Modem Model LB2120

Introduction

The NETGEAR LTE Modem LB2120, in this manual referred to as the modem, can provide broadband data services to areas where wired Internet is not readily available or is difficult, costly, or time-consuming to install. The modem uses existing 4G LTE mobile networks with automatic fallback to 3G mobile networks to provide broadband data services.The LB2120-100AUS and LB2120-100EUS models also support fallback to 2G mobile networks.

If you connect a WiFi router to the modem’s Gigabit Ethernet port, the mobile network connection can provide high-speed Internet access for multiple users and devices in homes and offices.

The modem provides wireline broadband pass-through for automatic failover support so you can connect the modem to an existing DSL, cable, or fiber optics gateway. If the wireline broadband connection goes down, the modem automatically and seamlessly switches over to the backup Internet connection over mobile broadband for continuous connectivity.This capability is enabled by default, but you might want to customize the IP addresses for failover detection (see Manage Automatic Failover Detection on page 20).

Professional installation and configuration are not required. If a SIM card is installed and activated, by default, the modem automatically searches for and connects to your network provider’s mobile broadband network.

For information about installing the modem, see the quick start guide, which you can download from downloadcenter.netgear.com.

In the unlikely situation that the modem does not automatically connect to your network provider’s mobile broadband network, you might need to add an access profile name (APN) profile. For information about adding an APN profile, see View APN Profiles or Add a Custom APN Profile on page 35.

Supported Mobile Broadband Bands

The following table describes the mobile broadband bands that are supported for each modem model.

Table 1. Mobile broadband bands

Model	LTE Category 4	3G UMTS	2G GSM
LB2120-100AUS	Bands 1, 2, 3, 5, 7, 8, 20, 28, 38, Bands 1, 2, 5, and 8		Quad band
	and 40
LB2120-100EUS	Bands 1, 2, 3, 5, 7, 8, 20, 28, 38, Bands 1, 2, 5, and 8		Quad band
	and 40
LB2120-100NAS	Bands 2, 4, 5, and 12	Bands 2 and 5	Not applicable

Introduction and Hardware Overview

LTE Modem Model LB2120

Package Contents

Your package contains the following items. The power adapter is localized to the country of sale. For some countries, a converter is included.

Figure 1. Package contents

Install the Micro SIM Card

A micro SIM card (that is, a 3FF SIM card) might be preinstalled in the modem or you might need to obtain a micro SIM card and install it yourself. To obtain a micro SIM card, contact your mobile broadband Internet service provider.

If you want to use a nano SIM card (that is, a 4FF SIM card), an adapter is required.

Figure 2. Overview of installing the micro SIM card

Introduction and Hardware Overview

LTE Modem Model LB2120

To install the micro SIM card in the modem:

1.Ensure that power to the modem is off.

2.Place the modem horizontally with the bottom panel facing you.

3.Remove the black plastic SIM slot cover so that you can access the metal SIM card slot.

4. Unlock the metal SIM card door by sliding it downward.

5. Open the metal SIM card door.

Introduction and Hardware Overview

LTE Modem Model LB2120

6. Carefully slide the micro SIM card into the metal slot.

7. Close the metal SIM card door.

8. Lock the metal SIM card door by sliding it upward.

9.Close the black plastic SIM slot cover.

10.Turn on power to the modem.

Introduction and Hardware Overview

LTE Modem Model LB2120

Top Panel With Status LEDs

The modem displays status LED bars on the top panel.

Figure 3. Modem top view with LED bars

The following table describes the LED bars and icons from left to right.

Table 2. LED descriptions (normal behavior)

Designation Icon or LED Bars	Description
Power	Solid green bar. The modem is receiving power and is connected to the Internet.
	The type of Internet connection (wireline or broadband) depends on the failover
	detection setting. By default, this setting is wireline broadband with automatic
	failover support to mobile broadband. (For more information, see Manage
	Automatic Failover Detection on page 20.)
	Blinking green bar. The modem uses mobile data because the wireline
	connection is down and the modem failed over to the backup Internet connection
	over the mobile broadband network.
	Solid amber bar. The mobile broadband connection is down. The modem is not
	connected to the Internet and no failover connection is available.
	Blinking amber bar. A SIM card is not installed or not correctly installed, the
	modem is overheating, or another system error occurred. For more information,
	see Troubleshoot With the LED Bars on page 87.
	Off. The modem is not receiving power.
Signal Strength	Solid green bar or bars. The five LED bars indicate the signal strength of the
	mobile broadband service that the modem is connected to. Five green bars indicate
	the strongest signal. One green bar (that is, the shortest bar) indicates the weakest
	signal.
	Off. The modem is not connected to a mobile broadband service.
LAN	Solid green bar. The Gigabit Ethernet port is connected to a powered-on LAN
	device.
	Off. The modem does not detect a powered-on LAN device.

Introduction and Hardware Overview

LTE Modem Model LB2120

Back Panel With Ports, Connectors, and Button

The following figure shows the ports, connectors, and button on the back panel of the modem.

Figure 4. Modem components on the back panel

From left to right, the back panel of the modem provides the following components:

•Connector for an external antenna. One switched RF connector for an optional external antenna (the external antenna requires two inputs).

•On/Off button. An On/Off button to control power to the modem.

Note After you press the On/Off button, wait about 30 seconds for the modem to complete the boot process.

•DC connector. A DC connector to connect the AC power supply that is included in the package.

•Gigabit Ethernet LAN port. One yellow RJ-45 Gigabit Ethernet LAN port to connect a router, WiFi router, Ethernet switch or hub, or single computer.

•Gigabit Ethernet WAN port. One blue RJ-45 Gigabit Ethernet WAN port to connect a wireline broadband modem, such as a DSL, cable, or fiber optics modem.

•Connector for an external antenna. Another switched RF connector for an optional external antenna (the external antenna requires two inputs).

Note A recessed Reset button is located on the bottom panel of the modem. The Reset button lets you return the modem to factory default settings.

Modem Label

In addition to the default URL and password to access the modem’s web pages, the modem label on the bottom panel shows the following information:

•Serial number (SN)

•Stockkeeping unit (SKU) number

•MAC address

•IMEI (International Mobile Station Equipment Identity)

Introduction and Hardware Overview

LTE Modem Model LB2120

Figure 5. Modem label

Position the Modem

Use the Signal Strength LED bars on the top panel to position the modem for best signal strength in relation to the mobile broadband network. Also for best results, place your modem according to the following guidelines:

•Place your modem close to a window but avoiding direct sunlight. A window location gives the best conditions for receiving a strong 4G LTE signal.

•Make sure that the modem is within reach of an AC power outlet and near Ethernet cables for wired computers.

•Place the modem away from electrical devices such as the following:

-Ceiling fans

-Home security systems

-Microwaves

-Computers

-Base of a cordless phone

-2.4 GHz cordless phone

-5 GHz cordless phone

•Place the modem away from large metal surfaces, large glass surfaces, insulated walls, and items such as the following:

-Solid metal doors

-Aluminum studs

-Fish tanks

Introduction and Hardware Overview

LTE Modem Model LB2120

-Mirrors

-Brick walls or surfaces

-Concrete walls or surfaces

For information about wall-mounting the modem, see Wall-Mount the Modem on page 97.

Optional External Antenna

You can purchase an external multiple input, multiple output (MIMO) antenna for the modem to extend the mobile broadband signal range indoors or in fringe network areas.

The external antenna plugs into the two antenna connectors on the modem to boost speeds and extend coverage in buildings or vehicles, or in remote sites where network coverage is sparse. You could, for example, attach the external antenna on a window with a suction cup.

Introduction and Hardware Overview

Get Started	2

This chapter describes how to connect to the modem. To get started, you do not need to configure the mobile broadband connection.

The chapter contains the following sections:

•Internet Connection Over Mobile Broadband on page 16

•Connect the Modem to a Wireline Broadband Modem on page 16

•Connect a Computer, Switch, Hub, Router, or WiFi Router to the Modem on page 17

•Access the Modem’s Web Pages for the First Time on page 17

•Change the Language on page 20

•Manage Automatic Failover Detection on page 20

LTE Modem Model LB2120

Internet Connection Over Mobile Broadband

Whether or not the mobile broadband Internet connection functions as a backup connection, by default, when the modem powers up with a SIM card installed, it automatically searches for and connects to your network provider’s mobile broadband network. This process might take several minutes. The SIM card that is installed determines the mobile broadband network to which the modem connects.

Note Even though the modem might connect to the mobile broadband network of the same service provider each time that you start the modem, the type of mobile broadband service (LTE, 4G, 3G, 2G, or another type of service) to which the modem connects might differ.

If the modem does not automatically connect to the mobile broadband network after 10 minutes, the Power LED remains solid amber, and you might need to contact your mobile service provider to get the access point name (APN) profile information and add (see View APN Profiles or Add a Custom APN Profile on page 35) and activate (see Select an APN Profile on page 37) a custom APN profile in the modem. If your mobile service provider informs you that your APN profile is correct but the modem still does not connect to the mobile broadband network, see Troubleshoot the Mobile Broadband Internet Connection on page 89.

If you do not want the modem to connect automatically to the mobile broadband network, change the default autoconnect option (see Manage Mobile Broadband Auto Connect Options on page 33).

For information about your mobile service provider and the broadband connection, see View Service Provider, Type of Service, and Signal Strength on page 66 and View Information About the Mobile Broadband Connection on page 69.

Connect the Modem to a Wireline Broadband Modem

The modem is designed to provide a primary Internet connection through a wireline broadband modem, such as a DSL, cable, or fiber optics modem, and a backup Internet connection over the mobile broadband network.

Unless you want to use the mobile broadband connection as your only Internet connection, you must connect the modem to a wireline broadband modem. If you configure automatic failover detection (see Manage Automatic Failover Detection on page 20), the modem can automatically switch over to the mobile broadband Internet connection if the primary Internet connection over the wireline broadband modem goes down.

To connect the modem to a wireline broadband modem:

1.Make sure that the modem is powered on.

2.Connect one end of an Ethernet cable to the blue WAN Gigabit Ethernet port on the modem.

3.Connect the other end of the Ethernet cable to a wireline broadband modem, such as a DSL, cable, or fiber optics modem, that provides an Internet connection.

Get Started

LTE Modem Model LB2120

Connect a Computer, Switch, Hub, Router, or WiFi Router to the Modem

By default, the modem functions in Router mode with the DHCP server enabled and IP pass-through (IPPT) disabled.This means that you can connect multiple devices to the modem, for example, through an Ethernet switch or hub, and that each device can receive an IP address from the modem.

If you want to connect a router or WiFi router to the modem, change the operation mode of the modem to Bridge mode, in which IP pass-through (IPPT) is enabled and only a single device can be connected to the Internet through the modem. (The single device that is connected to the modem is the router or WiFi router, but depending on the capabilities of the router or WiFi router, you can connect multiple devices to the router or WiFi router.)

If you want to connect a computer only to the modem, the modem can function either in Router mode or in Bridge mode.

For information about changing the operation mode of the modem, see Manage Router Mode and Bridge Mode on page 26.

Connect a Computer to the LAN Port of the Modem

You can add a single computer to the Ethernet local area network (LAN) of the modem.

To connect a computer to the Ethernet LAN of the modem:

1.Attach one end of the Ethernet cable that came in the product package to an Ethernet port on your computer.

2.Attach the other end of the cable to the yellow Gigabit Ethernet LAN port on the back panel of the modem.

Connect a Router or WiFi Router to the LAN Port of the Modem

You can add a router or WiFi router to the Ethernet local area network (LAN) of the modem.

To connect a router or WiFi router to the Ethernet LAN of the modem:

1.Attach one end of the Ethernet cable that came in the product package to an Ethernet port on your router or WiFi router.

2.Attach the other end of the cable to the yellow Gigabit Ethernet LAN port on the back panel of the modem.

Access the Modem’s Web Pages for the First Time

The modem comes configured and ready to use. You can use the modem’s web pages to monitor data usage and change basic settings.

You can log in to the modem’s web pages over an Ethernet cable (see Connect a Computer, Switch, Hub, Router, or WiFi Router to the Modem on page 17).

The modem’s web pages run on any device with a web browser such as Google Chrome, Mozilla Firefox, and Microsoft Internet Explorer.

Get Started

LTE Modem Model LB2120

To access the modem’s web pages:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.To access the full Dashboard page and other pages, do the following:

a.In the Sign In field, enter the modem’s admin password. See the modem label for the default password.

Note While the password that you enter is unique to your modem and is secure, we recommend that you change it to a password that you want to use. For more information, see Change the Modem Password on page 41.

b.If you do not want to enter your password each time that you access the modem’s web pages, select the Remember me check box.

c.Click the Sign In button.

Get Started

LTE Modem Model LB2120

The full Dashboard page displays. You are now ready to monitor the modem and manage the settings.

If the modem is not connected to a wireline broadband modem and the mobile broadband connection is active, the full Dashboard page displays a different connection graph.

4.To change the language, from the language menu in the upper right of the page, select a language. The language adjusts.

Get Started

LTE Modem Model LB2120

If you cannot log in to the modem or your browser does not display the Dashboard page, check the following:

•Make sure that the computer, router, or WiFi router is connected to the yellow LAN Gigabit Ethernet port of the modem.

•Make sure that your browser does not cache the previous page by closing and reopening the browser.

•If your computer is set to a static or fixed IP address (this type of setting is uncommon), change the setting to obtain an IP address automatically from the modem (see Change the LAN Settings on page 24).

For more troubleshooting information, see You Cannot Log In to the Modem on page 89.

Change the Language

You can change the language of the modem’s web pages.

To change the language:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings.

The page displays the general settings.

6.In the Language section, from the Default Language menu, select a language. The Submit button displays after you select the language.

7.Click the Submit button.

Your settings are saved and the language changes.

Manage Automatic Failover Detection

The modem provides wireline broadband pass-through with automatic failover support so that you can connect the modem to an existing DSL, cable, or fiber optics modem (see Connect the Modem to a Wireline Broadband Modem on page 16). If the wireline broadband connection goes down, the modem can automatically and seamlessly switch over to the backup Internet connection over the mobile broadband network for continuous connectivity. This capability is enabled by default.You can manage the IP addresses that are used in failover detection.

Get Started

LTE Modem Model LB2120

If you change the default connection to wireline broadband only or mobile broadband only, you effectively disable automatic failover.

To manage automatic failover detection:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings > Advanced > Failover.

By default, the Auto radio button is selected and automatic failover to the mobile broadband connection occurs if the wireline broadband connection goes down.

6.To manage IP addresses that the modem attempts to ping, do the following:

•To add an IP address, in the IPv4 Addresses list or IPv6 Addresses list, enter an IP address, and click the + button.

Get Started

LTE Modem Model LB2120

The IP address is added to the list. If the modem cannot successfully ping any of the IP addresses in the list, an automatic failover occurs. If the modem can successfully ping a single IP address in the list, no automatic failover occurs.

•To remove an IP address from the list, in the IPv4 Addresses list or IPv6 Addresses list, click the x button next to the IP address that you want to remove.

The IP address is removed from the list.

7.To change the default connection, do the following:

a.Select one of the following radio buttons:

•Auto. The modem uses wireline broadband by default and fails over to mobile broadband. This is the default setting.

•Wireline Broadband only. The modem uses wireline broadband only. This setting effectively disables automatic failover.

•Mobile Broadband only. The modem uses mobile broadband only. This setting effectively disables automatic failover.

If you select a radio button, the Submit button displays.

b.Click the Submit button. Your settings are saved.

Get Started

Manage the Modem LAN Settings	3

This chapter describes how to manage the LAN settings that the modem provides. The chapter contains the following sections:

•Change the LAN Settings on page 24

•Manage Router Mode and Bridge Mode on page 26

•Change the DHCP Server Settings on page 27

•Disable the DHCP Server on page 29

•Enable the DMZ on page 30

•Disable VPN Pass-Through on page 31

LTE Modem Model LB2120

Change the LAN Settings

The modem is preconfigured to use private IP addresses on the LAN side. The modem’s default LAN IP configuration is as follows:

•LAN IP address. 192.168.5.1

•Subnet mask. 255.255.255.0

This address and subnet mask are part of the designated private address range for use in private networks and are suitable for most applications. The IP address and subnet mask identify which addresses are local to a specific device and which must be reached through a gateway or router.

Although you can change the IP address of the modem, this is rarely necessary. However, if you establish a VPN connection to a server that assigns IP addresses in the same range as the one that is used by the modem, you must change the IP address of the modem to prevent network problems.

To change the LAN settings:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

Manage the Modem LAN Settings

LTE Modem Model LB2120

5. Select Settings > Advanced > LAN.

Note The diagnostics feature on the LAN page is intended for NETGEAR technical support only. By default, the Enable Diagnostics Off radio button is selected.

6.In the IP address field, enter a new IP address. The default IP address is 192.168.5.1.

The Submit button displays after you change the IP address.

7.In the Netmask field, enter a new network mask. The default network mask is 255.255.255.0.

8.Click the Submit button.

Your settings are saved and the modem restarts. A device that is connected to the modem is disconnected when the modem restarts.You can reconnect the device to the modem using the new IP address of the modem.

Manage the Modem LAN Settings

LTE Modem Model LB2120

Manage Router Mode and Bridge Mode

By default, Router mode is enabled on the modem. By connecting the modem to an Ethernet switch or hub, you can connect multiple Ethernet devices such as printers, credit card terminals, and computers to the modem.

In Router mode, Network Address Translation (NAT) is enabled, the built-in Dynamic Host Configuration Protocol (DHCP) server is enabled to assign a LAN IP address to each connected device, and IP pass-through (IPPT) is disabled.

In Bridge mode, only a single device can be connected to the Internet through the modem. This device can be a computer, router, or WiFi router. In Bridge mode, Network Address Translation (NAT) is disabled, the DHCP server is disabled, and IPPT is enabled.

Because IPPT is enabled in Bridge mode, Bridge mode can be useful for implementing a virtual private network (VPN), point-to-point, or remote management connection to a single device that is connected to the modem. Such connections usually require that a public IP address is assigned to the modem’s WAN port, and through IPPT, to the device that is connected to the modem. For Bridge mode, you can also specify the LTE netmask.

To change the modem from Router mode to Bridge mode, or the other way around:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings > Advanced > LAN. The LAN page displays.

Note The diagnostics feature on the LAN page is intended for NETGEAR technical support only. By default, the Enable Diagnostics Off radio button is selected.

6.Do one of the following:

•To enable Bridge mode, select the Bridge radio button. As an option, enter a different IP address in the IP Address field and an LTE network mask in the Netmask (LTE) field.

When the modem functions in Bridge mode, the default LTE network mask setting (255.255.255.0) works with most routers. If the modem and router do not operate together, adjust LTE network mask.

•To enable Router mode, select the Router radio button.

Manage the Modem LAN Settings

LTE Modem Model LB2120

By default, the Router radio button is selected.

7.Click the Submit button.

Your settings are saved and the modem restarts. Any devices that are connected to the modem are disconnected when the modem restarts.

Enabling Bridge mode automatically disables the modem’s DHCP server.You can connect only a single device to the modem.

Enabling Router mode automatically enables the modem’s DHCP server, which assigns a LAN IP address to each connected device.

Change the DHCP Server Settings

Note You can change the DHCP server settings only when the modem functions in Router mode (see Manage Router Mode and Bridge Mode on page 26).

The modem is preconfigured to function as a DHCP server when Router mode is enabled. The modem’s default DHCP IP address range is 192.168.5.20–192.168.5.99.

Although you can change the DHCP address range of the modem, this is rarely necessary. However, if you establish a VPN connection to a server that assigns IP addresses in the same range as the one that is used by the modem, you must change the DHCP range of the modem to prevent network problems.

The modem’s DHCP server assigns IP, DNS server, and default gateway addresses to all computers connected to the LAN.The assigned default gateway address is the LAN address of the modem.The modem assigns IP addresses to the attached computers from a predefined pool of addresses. (You can change the pool of addresses.) Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN. For most applications, the default DHCP and TCP/IP settings of the modem work well.

The modem delivers the following parameters to any LAN device that requests DHCP:

•An IP address from the range that you defined

•Subnet mask

•Gateway IP address (the modem’s LAN IP address)

•DNS server IP address (the modem’s LAN IP address)

To change the DHCP server settings when the modem functions in Router mode:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

Manage the Modem LAN Settings

LTE Modem Model LB2120

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings > Advanced > LAN.

Note The diagnostics feature on the LAN page is intended for NETGEAR technical support only. By default, the Enable Diagnostics Off radio button is selected.

6.Make sure that next to DHCP Server, the Enabled radio button is selected.

By default, when the modem functions in Router mode, the DHCP server is enabled.

7.In the DHCP IP Range fields, enter the start and end IP addresses for the DHCP pool.

The IP addresses must be in the same network as the LAN IP address of the modem. By default, the DHCP pool consists of addresses in the 192.168.5.20–192.168.5.99 range.

The Submit button displays after you enter IP addresses for the DHCP pool.

8.To change the period that the leased DHCP address remains effective, in the DHCP lease time field, enter a time in minutes.

By default, the lease time is 720 minutes (12 hours).

9.To change the DNS settings, next to DNS mode, select the Manual radio button. The DNS 1 and DNS 2 fields display.

Manage the Modem LAN Settings

LTE Modem Model LB2120

By default, the Auto radio button is selected and the modem uses the DNS servers that are specified by the mobile broadband service provider.

10.If you select the Manual radio button next to DNS mode, in the DNS 1 and DNS 2 fields, enter the IP addresses of the custom DNS servers.

11.Click the Submit button. Your settings are saved.

When you change the DHCP server settings, the modem resets. Any devices that are connected to the modem are disconnected when the modem resets and must obtain a new IP address when they reconnect to the modem.

Disable the DHCP Server

Note You can disable the DHCP server only when the modem functions in Router mode (see Manage Router Mode and Bridge Mode on page 26).

If you do not need the modem to issue IP addresses to connected devices through its DHCP server, you can disable the DHCP server.

To disable the modem’s DHCP server when the modem functions in Router mode:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings > Advanced > LAN. The LAN page displays.

Note The diagnostics feature on the LAN page is intended for NETGEAR technical support only. By default, the Enable Diagnostics Off radio button is selected.

6.Next to DHCP Server, select the Disable radio button.

The Submit button displays after you select the radio button.

Manage the Modem LAN Settings

LTE Modem Model LB2120

By default, the Enable radio button is selected and the DHCP server issues IP addresses to connected devices.

7.Click the Submit button. Your settings are saved.

Enable the DMZ

Note You can enable the DMZ settings only when the modem functions in Router mode (see Manage Router Mode and Bridge Mode on page 26).

In a demilitarized zone (DMZ) network configuration, a designated computer runs outside the firewall in the DMZ. This computer intercepts incoming Internet traffic, providing an extra layer of protection for the rest of the network, and sending all incoming data to a particular IP address.

To enable the DMZ when the modem functions in Router mode and to designate a computer to receive incoming traffic:

1.Launch a web browser from a device that is connected to the modem.

The device can be a computer that is directly connected to the modem or a client from a router that is connected to the modem.

2.In the address field of your browser, enter http://192.168.5.1. The limited Dashboard page displays.

3.If you did not select the Remember me check box when you logged in previously, enter the modem password in the Sign In field.

See the modem label for the default password.

4.Click the Sign In button.

The full Dashboard page displays.

5.Select Settings > Advanced > LAN. The LAN page displays.

Note The diagnostics feature on the LAN page is intended for NETGEAR technical support only. By default, the Enable Diagnostics Off radio button is selected.

6.Scroll down to the bottom of the page.

7.In the DMZ section, next to DMZ Enabled, select the On radio button.

The Submit button and the IP Address field display after you select the radio button. By default, the Off radio button is selected and the DMZ server is disabled.

8.In the DMZ Address field, enter the IP address of the computer to which you want all data sent.

Manage the Modem LAN Settings

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