Cisco Systems CSACS3415K9 User Manual

User Guide for Cisco Secure Access Control System 5.4

November 2013

Americas Headquarters

Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000

800 553-NETS (6387)

Fax: 408 527-0883

Text Part Number: OL-26225-01

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User Guide for Cisco Secure Access Control System 5.4

Preface xxiii

Audience xxiii

Document Conventions xxiii

Documentation Updates xxiv

Related Documentation xxiv

Obtaining Documentation and Submitting a Service Request xxv

CHAPTER

1 Introducing ACS 5.4 1-1

Overview of ACS 1-1

ACS Distributed Deployment 1-2

ACS 4.x and 5.4 Replication 1-2

ACS Licensing Model 1-3

ACS Management Interfaces 1-3

ACS Web-based Interface 1-4 ACS Command Line Interface 1-4 ACS Programmatic Interfaces 1-5

Hardware Models Supported by ACS 1-5

2 Migrating from ACS 4.x to ACS 5.4 2-1

Overview of the Migration Process 2-2

Migration Requirements 2-2 Supported Migration Versions 2-2

Before You Begin 2-3

Downloading Migration Files 2-3

CHAPTER

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Migrating from ACS 4.x to ACS 5.4 2-3

Functionality Mapping from ACS 4.x to ACS 5.4 2-5

Common Scenarios in Migration 2-7

Migrating from ACS 4.2 on CSACS 1120 to ACS 5.4 2-7 Migrating from ACS 3.x to ACS 5.4 2-8 Migrating Data from Other AAA Servers to ACS 5.4 2-8

3 ACS 5.x Policy Model 3-1

Overview of the ACS 5.x Policy Model 3-1

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Contents

Policy Terminology 3-3 Simple Policies 3-4 Rule-Based Policies 3-4 Types of Policies 3-5

Access Services 3-6

Identity Policy 3-9 Group Mapping Policy 3-11 Authorization Policy for Device Administration 3-11

Processing Rules with Multiple Command Sets 3-11 Exception Authorization Policy Rules 3-12

Service Selection Policy 3-12

Simple Service Selection 3-12 Rules-Based Service Selection 3-13 Access Services and Service Selection Scenarios 3-13 First-Match Rule Tables 3-14

Policy Conditions 3-16 Policy Results 3-16

CHAPTER

Authorization Profiles for Network Access 3-16

Processing Rules with Multiple Authorization Profiles 3-17

Policies and Identity Attributes 3-17

Policies and Network Device Groups 3-18

Example of a Rule-Based Policy 3-18

Flows for Configuring Services and Policies 3-19

4 Common Scenarios Using ACS 4-1

Overview of Device Administration 4-2

Session Administration 4-3 Command Authorization 4-4 TACACS+ Custom Services and Attributes 4-5

Password-Based Network Access 4-5

Overview of Password-Based Network Access 4-5 Password-Based Network Access Configuration Flow 4-7

Certificate-Based Network Access 4-9

Overview of Certificate-Based Network Access 4-9 Using Certificates in ACS 4-10

Certificate-Based Network Access 4-10 Authorizing the ACS Web Interface from Your Browser Using a Certificate 4-11 Validating an LDAP Secure Authentication Connection 4-12

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Agentless Network Access 4-12

Overview of Agentless Network Access 4-12 Host Lookup 4-13 Authentication with Call Check 4-14

Process Service-Type Call Check 4-15 PAP/EAP-MD5 Authentication 4-15 Agentless Network Access Flow 4-16 Adding a Host to an Internal Identity Store 4-17 Configuring an LDAP External Identity Store for Host Lookup 4-17 Configuring an Identity Group for Host Lookup Network Access Requests 4-18 Creating an Access Service for Host Lookup 4-18

Configuring an Identity Policy for Host Lookup Requests 4-19

Configuring an Authorization Policy for Host Lookup Requests 4-20

VPN Remote Network Access 4-20

Supported Authentication Protocols 4-21 Supported Identity Stores 4-21 Supported VPN Network Access Servers 4-22 Supported VPN Clients 4-22 Configuring VPN Remote Access Service 4-22

Contents

CHAPTER

ACS and Cisco Security Group Access 4-23

Adding Devices for Security Group Access 4-24 Creating Security Groups 4-24 Creating SGACLs 4-25 Configuring an NDAC Policy 4-25 Configuring EAP-FAST Settings for Security Group Access 4-26 Creating an Access Service for Security Group Access 4-26 Creating an Endpoint Admission Control Policy 4-27 Creating an Egress Policy 4-27 Creating a Default Policy 4-28

RADIUS and TACACS+ Proxy Requests 4-29

Supported Protocols 4-30 Supported RADIUS Attributes 4-31 TACACS+ Body Encryption 4-31 Connection to TACACS+ Server 4-31 Configuring Proxy Service 4-32

5 Understanding My Workspace 5-1

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Welcome Page 5-1

Task Guides 5-2

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Contents

My Account Page 5-2

Using the Web Interface 5-3

Accessing the Web Interface 5-4

Logging In 5-4 Logging Out 5-5

Understanding the Web Interface 5-5

Web Interface Design 5-6 Navigation Pane 5-7 Content Area 5-8

Importing and Exporting ACS Objects through the Web Interface 5-18

Supported ACS Objects 5-18 Creating Import Files 5-21

Downloading the Template from the Web Interface 5-21 Understanding the CSV Templates 5-22 Creating the Import File 5-22

CHAPTER

Common Errors 5-25

Concurrency Conflict Errors 5-25 Deletion Errors 5-26 System Failure Errors 5-27

Accessibility 5-27

Display and Readability Features 5-27 Keyboard and Mouse Features 5-28 Obtaining Additional Accessibility Information 5-28

6 Post-Installation Configuration Tasks 6-1

Configuring Minimal System Setup 6-1

Configuring ACS to Perform System Administration Tasks 6-2

Configuring ACS to Manage Access Policies 6-4

Configuring ACS to Monitor and Troubleshoot Problems in the Network 6-4

7 Managing Network Resources 7-1

Network Device Groups 7-2

Creating, Duplicating, and Editing Network Device Groups 7-2 Deleting Network Device Groups 7-3 Creating, Duplicating, and Editing Network Device Groups Within a Hierarchy 7-4 Deleting Network Device Groups from a Hierarchy 7-5

Network Devices and AAA Clients 7-5

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Viewing and Performing Bulk Operations for Network Devices 7-6 Exporting Network Devices and AAA Clients 7-7 Performing Bulk Operations for Network Resources and Users 7-8 Exporting Network Resources and Users 7-10 Creating, Duplicating, and Editing Network Devices 7-10

Configuring Network Device and AAA Clients 7-11 Displaying Network Device Properties 7-14 Deleting Network Devices 7-17

Configuring a Default Network Device 7-17

Working with External Proxy Servers 7-19

Creating, Duplicating, and Editing External Proxy Servers 7-19 Deleting External Proxy Servers 7-21

Working with OCSP Services 7-21

Creating, Duplicating, and Editing OCSP Servers 7-22 Deleting OCSP Servers 7-24

Contents

CHAPTER

8 Managing Users and Identity Stores 8-1

Overview 8-1

Internal Identity Stores 8-1 External Identity Stores 8-2

Identity Stores with Two-Factor Authentication 8-3 Identity Groups 8-3 Certificate-Based Authentication 8-3 Identity Sequences 8-4

Managing Internal Identity Stores 8-4

Authentication Information 8-5 Identity Groups 8-6

Creating Identity Groups 8-6

Deleting an Identity Group 8-7 Managing Identity Attributes 8-7

Standard Attributes 8-8

User Attributes 8-8

Host Attributes 8-9 Configuring Authentication Settings for Users 8-9 Creating Internal Users 8-11 Deleting Users from Internal Identity Stores 8-15 Viewing and Performing Bulk Operations for Internal Identity Store Users 8-15 Creating Hosts in Identity Stores 8-16 Deleting Internal Hosts 8-18

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Viewing and Performing Bulk Operations for Internal Identity Store Hosts 8-18 Management Hierarchy 8-19

Attributes of Management Hierarchy 8-19 Configuring AAA Devices for Management Hierarchy 8-19 Configuring Users or Hosts for Management Hierarchy 8-20 Configuring and Using UserIsInManagement Hierarchy Attribute 8-20 Configuring and Using HostIsInManagement Hierarchy Attributes 8-21

Managing External Identity Stores 8-22

LDAP Overview 8-22

Directory Service 8-23 Authentication Using LDAP 8-23 Multiple LDAP Instances 8-23 Failover 8-24 LDAP Connection Management 8-24 Authenticating a User Using a Bind Connection 8-24 Group Membership Information Retrieval 8-25 Attributes Retrieval 8-25 Certificate Retrieval 8-26 Creating External LDAP Identity Stores 8-26 Configuring an External LDAP Server Connection 8-27 Configuring External LDAP Directory Organization 8-29 Deleting External LDAP Identity Stores 8-33 Configuring LDAP Groups 8-33 Viewing LDAP Attributes 8-34

Leveraging Cisco NAC Profiler as an External MAB Database 8-34

Enabling the LDAP Interface on Cisco NAC Profiler to Communicate with ACS 8-35 Configuring NAC Profile LDAP Definition in ACS for Use in Identity Policy 8-37 Troubleshooting MAB Authentication with Profiler Integration 8-41

Microsoft AD 8-41

Machine Authentication 8-43 Attribute Retrieval for Authorization 8-44 Group Retrieval for Authorization 8-44 Certificate Retrieval for EAP-TLS Authentication 8-44 Concurrent Connection Management 8-44 User and Machine Account Restrictions 8-44 Machine Access Restrictions 8-45 Distributed MAR Cache 8-46 Dial-In Permissions 8-47 Callback Options for Dial-In users 8-48 Joining ACS to an AD Domain 8-49

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Configuring an AD Identity Store 8-49

Selecting an AD Group 8-53

Configuring AD Attributes 8-54

Configuring Machine Access Restrictions 8-56 RSA SecurID Server 8-57

Configuring RSA SecurID Agents 8-58

Creating and Editing RSA SecurID Token Servers 8-59 RADIUS Identity Stores 8-63

Supported Authentication Protocols 8-63

Failover 8-64

Password Prompt 8-64

User Group Mapping 8-64

Groups and Attributes Mapping 8-64

RADIUS Identity Store in Identity Sequence 8-65

Authentication Failure Messages 8-65

Username Special Format with Safeword Server 8-65

User Attribute Cache 8-66

Creating, Duplicating, and Editing RADIUS Identity Servers 8-66

Contents

CHAPTER

Configuring CA Certificates 8-71

Adding a Certificate Authority 8-72 Editing a Certificate Authority and Configuring Certificate Revocation Lists 8-73 Deleting a Certificate Authority 8-74 Exporting a Certificate Authority 8-75

Configuring Certificate Authentication Profiles 8-75

Configuring Identity Store Sequences 8-77

Creating, Duplicating, and Editing Identity Store Sequences 8-78 Deleting Identity Store Sequences 8-80

9 Managing Policy Elements 9-1

Managing Policy Conditions 9-1

Creating, Duplicating, and Editing a Date and Time Condition 9-3 Creating, Duplicating, and Editing a Custom Session Condition 9-5 Deleting a Session Condition 9-6 Managing Network Conditions 9-6

Importing Network Conditions 9-8

Exporting Network Conditions 9-9

Creating, Duplicating, and Editing End Station Filters 9-9

Creating, Duplicating, and Editing Device Filters 9-12

Creating, Duplicating, and Editing Device Port Filters 9-15

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Contents

Managing Authorizations and Permissions 9-17

Creating, Duplicating, and Editing Authorization Profiles for Network Access 9-18

Specifying Authorization Profiles 9-19 Specifying Common Attributes in Authorization Profiles 9-19

Specifying RADIUS Attributes in Authorization Profiles 9-22 Creating and Editing Security Groups 9-24 Creating, Duplicating, and Editing a Shell Profile for Device Administration 9-24

Defining General Shell Profile Properties 9-26

Defining Common Tasks 9-26

Defining Custom Attributes 9-29 Creating, Duplicating, and Editing Command Sets for Device Administration 9-29 Creating, Duplicating, and Editing Downloadable ACLs 9-32 Deleting an Authorizations and Permissions Policy Element 9-33 Configuring Security Group Access Control Lists 9-34

CHAPTER

10 Managing Access Policies 10-1

Policy Creation Flow 10-1

Network Definition and Policy Goals 10-2 Policy Elements in the Policy Creation Flow 10-3 Access Service Policy Creation 10-4 Service Selection Policy Creation 10-4

Customizing a Policy 10-4

Configuring the Service Selection Policy 10-5

Configuring a Simple Service Selection Policy 10-6 Service Selection Policy Page 10-6 Creating, Duplicating, and Editing Service Selection Rules 10-8 Displaying Hit Counts 10-10 Deleting Service Selection Rules 10-10

Configuring Access Services 10-11

Editing Default Access Services 10-11 Creating, Duplicating, and Editing Access Services 10-12

Configuring General Access Service Properties 10-13

Configuring Access Service Allowed Protocols 10-16

Configuring Access Services Templates 10-20 Deleting an Access Service 10-21

Configuring Access Service Policies 10-22

Viewing Identity Policies 10-22

Viewing Rules-Based Identity Policies 10-24 Configuring Identity Policy Rule Properties 10-25

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Configuring a Group Mapping Policy 10-27 Configuring Group Mapping Policy Rule Properties 10-29 Configuring a Session Authorization Policy for Network Access 10-30 Configuring Network Access Authorization Rule Properties 10-32 Configuring Device Administration Authorization Policies 10-33 Configuring Device Administration Authorization Rule Properties 10-34 Configuring Device Administration Authorization Exception Policies 10-34 Configuring Shell/Command Authorization Policies for Device Administration 10-35 Configuring Authorization Exception Policies 10-36 Creating Policy Rules 10-38 Duplicating a Rule 10-39 Editing Policy Rules 10-39 Deleting Policy Rules 10-40

Configuring Compound Conditions 10-41

Compound Condition Building Blocks 10-41 Types of Compound Conditions 10-42 Using the Compound Expression Builder 10-45

Contents

CHAPTER

Security Group Access Control Pages 10-46

Egress Policy Matrix Page 10-46 Editing a Cell in the Egress Policy Matrix 10-47 Defining a Default Policy for Egress Policy Page 10-47 NDAC Policy Page 10-48 NDAC Policy Properties Page 10-49 Network Device Access EAP-FAST Settings Page 10-51

Maximum User Sessions 10-51

Max Session User Settings 10-52 Max Session Group Settings 10-52 Max Session Global Setting 10-53 Purging User Sessions 10-54 Maximum User Session in Distributed Environment 10-55 Maximum User Session in Proxy Scenario 10-56

11 Monitoring and Reporting in ACS 11-1

Authentication Records and Details 11-2

Dashboard Pages 11-2

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Working with Portlets 11-4

Working with Authentication Lookup Portlet 11-5

Running Authentication Lookup Report 11-6

Configuring Tabs in the Dashboard 11-6

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Adding Tabs to the Dashboard 11-6

Adding Applications to Tabs 11-7 Renaming Tabs in the Dashboard 11-7 Changing the Dashboard Layout 11-8 Deleting Tabs from the Dashboard 11-8

CHAPTER

12 Managing Alarms 12-1

Understanding Alarms 12-1

Evaluating Alarm Thresholds 12-2 Notifying Users of Events 12-3

Viewing and Editing Alarms in Your Inbox 12-3

Understanding Alarm Schedules 12-9

Creating and Editing Alarm Schedules 12-9 Assigning Alarm Schedules to Thresholds 12-10 Deleting Alarm Schedules 12-11

Creating, Editing, and Duplicating Alarm Thresholds 12-11

Configuring General Threshold Information 12-13 Configuring Threshold Criteria 12-14

Passed Authentications 12-14

Failed Authentications 12-16

Authentication Inactivity 12-18

TACACS Command Accounting 12-19

TACACS Command Authorization 12-20

ACS Configuration Changes 12-21

ACS System Diagnostics 12-22

ACS Process Status 12-23

ACS System Health 12-24

ACS AAA Health 12-25

RADIUS Sessions 12-26

Unknown NAD 12-27

External DB Unavailable 12-28

RBACL Drops 12-29

NAD-Reported AAA Downtime 12-31 Configuring Threshold Notifications 12-32

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Deleting Alarm Thresholds 12-33

Configuring System Alarm Settings 12-34

Understanding Alarm Syslog Targets 12-35

Creating and Editing Alarm Syslog Targets 12-35 Deleting Alarm Syslog Targets 12-36

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Contents

CHAPTER

13 Managing Reports 13-1

Working with Favorite Reports 13-3

Adding Reports to Your Favorites Page 13-3 Viewing Favorite-Report Parameters 13-4 Editing Favorite Reports 13-5 Running Favorite Reports 13-5 Deleting Reports from Favorites 13-6

Sharing Reports 13-6

Working with Catalog Reports 13-7

Available Reports in the Catalog 13-7 Running Catalog Reports 13-11 Deleting Catalog Reports 13-12 Running Named Reports 13-13

Understanding the Report_Name Page 13-14 Enabling RADIUS CoA Options on a Device 13-17 Changing Authorization and Disconnecting Active RADIUS Sessions 13-18 Customizing Reports 13-19 Restoring Reports 13-20

Viewing Reports 13-20

About Standard Viewer 13-21 About Interactive Viewer 13-21 About the Interactive Viewer Context Menus 13-21 Navigating Reports 13-22

Using the Table of Contents 13-23 Exporting Report Data 13-24 Printing Reports 13-26 Saving Report Designs in Interactive Viewer 13-26

Formatting Reports in Interactive Viewer 13-27

Editing Labels 13-27 Formatting Labels 13-28 Formatting Data 13-28 Resizing Columns 13-29 Changing Column Data Alignment 13-29 Formatting Data in Columns 13-29 Formatting Data in Aggregate Rows 13-30 Formatting Data Types 13-30 Formatting Numeric Data 13-31 Formatting Fixed or Scientific Numbers or Percentages 13-32 Formatting Custom Numeric Data 13-33

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Formatting String Data 13-33 Formatting Custom String Data 13-33 Formatting Date and Time 13-35 Formatting Custom Date and Time 13-35 Formatting Boolean Data 13-36 Applying Conditional Formats 13-37 Setting Conditional Formatting for Columns 13-38 Deleting Conditional Formatting 13-40 Setting and Removing Page Breaks in Detail Columns 13-40 Setting and Removing Page Breaks in a Group Column 13-41

Organizing Report Data 13-41

Displaying and Organizing Report Data 13-42 Reordering Columns in Interactive Viewer 13-42 Removing Columns 13-44 Hiding or Displaying Report Items 13-44 Hiding Columns 13-45 Displaying Hidden Columns 13-45 Merging Columns 13-45 Selecting a Column from a Merged Column 13-47 Sorting Data 13-47 Sorting a Single Column 13-47 Sorting Multiple Columns 13-47 Grouping Data 13-49 Adding Groups 13-50 Grouping Data Based on Date or Time 13-50 Removing an Inner Group 13-51 Creating Report Calculations 13-52

Understanding Supported Calculation Functions 13-53 Understanding Supported Operators 13-61 Using Numbers and Dates in an Expression 13-61 Using Multiply Values in Calculated Columns 13-62 Adding Days to an Existing Date Value 13-62

Subtracting Date Values in a Calculated Column 13-63 Working with Aggregate Data 13-63 Creating an Aggregate Data Row 13-65 Adding Additional Aggregate Rows 13-66 Deleting Aggregate Rows 13-67

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Hiding and Filtering Report Data 13-67

Hiding or Displaying Column Data 13-67

Displaying Repeated Values 13-68

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Hiding or Displaying Detail Rows in Groups or Sections 13-68

Working with Filters 13-69

Types of Filter Conditions 13-70 Setting Filter Values 13-71 Creating Filters 13-72 Modifying or Clearing a Filter 13-73 Creating a Filter with Multiple Conditions 13-73

Deleting One Filter Condition in a Filter that Contains Multiple Conditions 13-75 Filtering Highest or Lowest Values in Columns 13-75

Understanding Charts 13-76

Modifying Charts 13-77

Filtering Chart Data 13-77

Changing Chart Subtype 13-78

Changing Chart Formatting 13-78

Contents

CHAPTER

14 Troubleshooting ACS with the Monitoring and Report Viewer 14-1

Available Diagnostic and Troubleshooting Tools 14-1

Connectivity Tests 14-1 ACS Support Bundle 14-1 Expert Troubleshooter 14-2

Performing Connectivity Tests 14-3

Downloading ACS Support Bundles for Diagnostic Information 14-4

Working with Expert Troubleshooter 14-6

Troubleshooting RADIUS Authentications 14-6 Executing the Show Command on a Network Device 14-10 Evaluating the Configuration of a Network Device 14-10 Comparing SGACL Policy Between a Network Device and ACS 14-12 Comparing the SXP-IP Mappings Between a Device and its Peers 14-12 Comparing IP-SGT Pairs on a Device with ACS-Assigned SGT Records 14-15 Comparing Device SGT with ACS-Assigned Device SGT 14-16

15 Managing System Operations and Configuration in the Monitoring and Report Viewer 15-1

Configuring Data Purging and Incremental Backup 15-3

Configuring NFS Staging 15-7

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Restoring Data from a Backup 15-7

Viewing Log Collections 15-8

Log Collection Details Page 15-10

Recovering Log Messages 15-12

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Viewing Scheduled Jobs 15-12

Viewing Process Status 15-14

Viewing Data Upgrade Status 15-15

Viewing Failure Reasons 15-15

Editing Failure Reasons 15-15

Specifying E-Mail Settings 15-16

Configuring SNMP Preferences 15-16

Understanding Collection Filters 15-17

Creating and Editing Collection Filters 15-17 Deleting Collection Filters 15-18

Configuring System Alarm Settings 15-18

Configuring Alarm Syslog Targets 15-18

Configuring Remote Database Settings 15-18

Changing the Port Numbers for Oracle Database 15-20

CHAPTER

16 Managing System Administrators 16-1

Understanding Administrator Roles and Accounts 16-2

Understanding Authentication 16-3

Configuring System Administrators and Accounts 16-3

Understanding Roles 16-3

Assigning Roles 16-3 Assigning Static Roles 16-4

Assigning Dynamic Roles 16-4 Permissions 16-4 Predefined Roles 16-5 Changing Role Associations 16-6 Administrator Accounts and Role Association 16-6

Recovery Administrator Account 16-7

Creating, Duplicating, Editing, and Deleting Administrator Accounts 16-7

Viewing Predefined Roles 16-9

Viewing Role Properties 16-10

Configuring Authentication Settings for Administrators 16-10

Configuring Session Idle Timeout 16-12

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Configuring Administrator Access Settings 16-13

Working with Administrative Access Control 16-14

Administrator Identity Policy 16-15

Viewing Rule-Based Identity Policies 16-16

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Configuring Identity Policy Rule Properties 16-18 Administrator Authorization Policy 16-19 Configuring Administrator Authorization Policies 16-19 Configuring Administrator Authorization Rule Properties 16-20 Administrator Login Process 16-21

Resetting the Administrator Password 16-22

Changing the Administrator Password 16-22

Changing Your Own Administrator Password 16-22 Resetting Another Administrator’s Password 16-23

Contents

CHAPTER

17 Configuring System Operations 17-1

Understanding Distributed Deployment 17-2

Activating Secondary Servers 17-3 Removing Secondary Servers 17-4 Promoting a Secondary Server 17-4 Understanding Local Mode 17-4 Understanding Full Replication 17-5 Specifying a Hardware Replacement 17-5

Scheduled Backups 17-6

Creating, Duplicating, and Editing Scheduled Backups 17-6

Backing Up Primary and Secondary Instances 17-8

Synchronizing Primary and Secondary Instances After Backup and Restore 17-9

Editing Instances 17-9

Viewing and Editing a Primary Instance 17-9 Viewing and Editing a Secondary Instance 17-13 Deleting a Secondary Instance 17-13

Activating a Secondary Instance 17-14

Registering a Secondary Instance to a Primary Instance 17-14

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Deregistering Secondary Instances from the Distributed System Management Page 17-17

Deregistering a Secondary Instance from the Deployment Operations Page 17-17

Promoting a Secondary Instance from the Distributed System Management Page 17-18

Promoting a Secondary Instance from the Deployment Operations Page 17-19

Replicating a Secondary Instance from a Primary Instance 17-19

Replicating a Secondary Instance from the Distributed System Management Page 17-20 Replicating a Secondary Instance from the Deployment Operations Page 17-20 Changing the IP address of a Primary Instance from the Primary Server 17-21 Failover 17-22

Using the Deployment Operations Page to Create a Local Mode Instance 17-23

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Creating, Duplicating, Editing, and Deleting Software Repositories 17-24 Managing Software Repositories from the Web Interface and CLI 17-25

CHAPTER

18 Managing System Administration Configurations 18-1

Configuring Global System Options 18-1

Configuring TACACS+ Settings 18-1 Configuring EAP-TLS Settings 18-2 Configuring PEAP Settings 18-3 Configuring EAP-FAST Settings 18-3 Generating EAP-FAST PAC 18-4

Configuring RSA SecurID Prompts 18-4

Managing Dictionaries 18-5

Viewing RADIUS and TACACS+ Attributes 18-5 Creating, Duplicating, and Editing RADIUS Vendor-Specific Attributes 18-6 Creating, Duplicating, and Editing RADIUS Vendor-Specific Subattributes 18-7 Viewing RADIUS Vendor-Specific Subattributes 18-9 Configuring Identity Dictionaries 18-10 Creating, Duplicating, and Editing an Internal User Identity Attribute 18-10 Configuring Internal Identity Attributes 18-11 Deleting an Internal User Identity Attribute 18-12 Creating, Duplicating, and Editing an Internal Host Identity Attribute 18-13 Deleting an Internal Host Identity Attribute 18-13 Adding Static IP address to Users in Internal Identity Store 18-14

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Configuring Local Server Certificates 18-14

Adding Local Server Certificates 18-14

Importing Server Certificates and Associating Certificates to Protocols 18-15 Generating Self-Signed Certificates 18-16 Generating a Certificate Signing Request 18-17 Binding CA Signed Certificates 18-18 Editing and Renewing Certificates 18-18 Deleting Certificates 18-19 Exporting Certificates 18-20 Viewing Outstanding Signing Requests 18-20

Configuring Logs 18-21

Configuring Remote Log Targets 18-21 Deleting a Remote Log Target 18-23 Configuring the Local Log 18-24 Deleting Local Log Data 18-24 Configuring Logging Categories 18-24

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Configuring Global Logging Categories 18-25 Configuring Per-Instance Logging Categories 18-29 Configuring Per-Instance Security and Log Settings 18-30

Configuring Per-Instance Remote Syslog Targets 18-31 Displaying Logging Categories 18-32 Configuring the Log Collector 18-33 Viewing the Log Message Catalog 18-33

Licensing Overview 18-34

Types of Licenses 18-34

Installing a License File 18-35

Viewing the Base License 18-36 Upgrading the Base Server License 18-37

Viewing License Feature Options 18-38

Adding Deployment License Files 18-39

Contents

CHAPTER

Deleting Deployment License Files 18-40

Available Downloads 18-40

Downloading Migration Utility Files 18-41 Downloading UCP Web Service Files 18-41 Downloading Sample Python Scripts 18-41 Downloading Rest Services 18-42

19 Understanding Logging 19-1

About Logging 19-1

Using Log Targets 19-2 Logging Categories 19-2 Global and Per-Instance Logging Categories 19-4 Log Message Severity Levels 19-4 Local Store Target 19-5

Critical Log Target 19-7 Remote Syslog Server Target 19-8 Monitoring and Reports Server Target 19-10 Viewing Log Messages 19-10 Debug Logs 19-11

APPENDIX

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ACS 4.x Versus ACS 5.4 Logging 19-12

A AAA Protocols A-1

Typical Use Cases A-1

Device Administration (TACACS+) A-1

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Session Access Requests (Device Administration [TACACS+]) A-2 Command Authorization Requests A-2

Network Access (RADIUS With and Without EAP) A-2

RADIUS-Based Flow Without EAP Authentication A-3 RADIUS-Based Flows with EAP Authentication A-3

Access Protocols—TACACS+ and RADIUS A-5

Overview of TACACS+ A-5

Overview of RADIUS A-6

RADIUS VSAs A-6 ACS 5.4 as the AAA Server A-7 RADIUS Attribute Support in ACS 5.4 A-8

RADIUS Attribute Rewrite Operation A-9

RADIUS Access Requests A-11

APPENDIX

B Authentication in ACS 5.4 B-1

Authentication Considerations B-1

Authentication and User Databases B-1

PAP B-2

RADIUS PAP Authentication B-3

EAP B-3

EAP-MD5 B-5

Overview of EAP-MD5 B-5 EAP- MD5 Flow in ACS 5.4 B-5

EAP-TLS B-5

Overview of EAP-TLS B-6

User Certificate Authentication B-6 PKI Authentication B-7

PKI Credentials B-8

PKI Usage B-8 Fixed Management Certificates B-9 Importing Trust Certificates B-9

Acquiring Local Certificates B-9

Importing the ACS Server Certificate B-10 Initial Self-Signed Certificate Generation B-10

Certificate Generation B-10 Exporting Credentials B-11 Credentials Distribution B-12

Hardware Replacement and Certificates B-12 Securing the Cryptographic Sensitive Material B-12

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Private Keys and Passwords Backup B-13

EAP-TLS Flow in ACS 5.4 B-13

PEAPv0/1 B-14

Overview of PEAP B-15

Supported PEAP Features B-15

PEAP Flow in ACS 5.4 B-17

Creating the TLS Tunnel B-18 Authenticating with MSCHAPv2 B-19

EAP-FAST B-19

Overview of EAP-FAST B-19

EAP-FAST Benefits B-21

EAP-FAST in ACS 5.4 B-21

About Master-Keys B-22 About PACs B-22 Provisioning Modes B-23 Types of PACs B-23 ACS-Supported Features for PACs B-25 Master Key Generation and PAC TTLs B-27

EAP-FAST for Allow TLS Renegotiation B-27 EAP-FAST Flow in ACS 5.4. B-27 EAP-FAST PAC Management B-28

Key Distribution Algorithm B-29

EAP-FAST PAC-Opaque Packing and Unpacking B-29

Revocation Method B-29

PAC Migration from ACS 4.x B-29

Contents

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EAP Authentication with RADIUS Key Wrap B-30

EAP-MSCHAPv2 B-30

Overview of EAP-MSCHAPv2 B-31

MSCHAPv2 for User Authentication B-31

MSCHAPv2 for Change Password B-31

Windows Machine Authentication Against AD B-31 EAP- MSCHAPv2 Flow in ACS 5.4 B-32

CHAP B-32

LEAP B-32

Certificate Attributes B-32

Certificate Binary Comparison B-33

Rules Relating to Textual Attributes B-33 Certificate Revocation B-34

Machine Authentication B-35

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Contents

Authentication Protocol and Identity Store Compatibility B-36

APPENDIX

LOSSARY

NDEX

C Open Source License Acknowledgements C-1

Notices C-1

OpenSSL/Open SSL Project C-1

License Issues C-1

C-3

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Preface

Revised: November 13, 2013

This guide describes how to use Cisco Secure Access Control System (ACS) 5.4.

Audience

This guide is for security administrators who use ACS, and who set up and maintain network and application security.

Document Conventions

This guide uses the convention whereby the symbol ^ represents the key labeled Control. For example, the key combination ^z means hold down the Control key while you press the z key.

Command descriptions use these conventions:

• Examples that contain system prompts denote interactive sessions, indicating the commands that

you should enter at the prompt. The system prompt indicates the current level of the EXEC command interpreter. For example, the prompt level, and the prompt privileged level usually requires a password.

Router> indicates that you should be at the user

Router# indicates that you should be at the privileged level. Access to the

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• Commands and keywords are in boldface font.

• Arguments for which you supply values are in italic font.

• Elements in square brackets ([ ]) are optional.

• Alternative keywords of which you must choose one are grouped in braces ({}) and separated by

vertical bars (|).

Examples use these conventions:

• Terminal sessions and sample console screen displays are in screen font.

• Information you enter is in boldface screen font.

• Nonprinting characters, such as passwords, are in angle brackets (< >).

• Default responses to system prompts are in square brackets ([]).

• An exclamation point (!) at the beginning of a line indicates a comment line.

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Caution Means reader be careful. You are capable of doing something that might result in equipment damage or

loss of data.

Timesaver Means the described action saves time. You can save time by performing the action described in the

paragraph.

Note Means reader take note. Notes identify important information that you should reflect upon before

continuing, contain helpful suggestions, or provide references to materials not contained in the document.

Documentation Updates

Table 1 lists the updates to the User Guide for Cisco Secure Access Control System 5.4.

Preface

Table 1 Updates to the User Guide for Cisco Secure Access Control System 5.4

Date Description

9/26/2013 Fixed the following bugs:

• CSCuh90646

• CSCuj24445

10/30/2012 Updated the guide with Cisco 3415 Secure Access Control System information.

10/23/2012 Cisco Secure Access Control System, Release 5.4.

Introducing ACS 5.4

This section contains the following topics:

• Overview of ACS, page 1-1

• ACS Distributed Deployment, page 1-2

• ACS Management Interfaces, page 1-3

Overview of ACS

ACS is a policy-based security server that provides standards-compliant Authentication, Authorization, and Accounting (AAA) services to your network. ACS facilitates the administrative management of Cisco and non-Cisco devices and applications.

As a dominant enterprise network access control platform, ACS serves as an integration point for network access control and identity management.

CHA PTER

ACS 5.x provides a rule-based policy model that allows you to control network access based on dynamic conditions and attributes. The rule-based policy is designed to meet complex access policy needs. For more information on the rule-based policy model in ACS, see Chapter 3, “ACS 5.x Policy Model.”

Within the greater context of two major AAA protocols—RADIUS and TACACS+—ACS provides the following basic areas of functionality:

• Under the framework of the RADIUS protocol, ACS controls the wired and wireless access by users

and host machines to the network and manages the accounting of the network resources used.

ACS supports multiple RADIUS-based authentication methods that includes PAP, CHAP, MSCHAPv1, MSCHAPv2. It also supports many members of the EAP family of protocols, such as EAP-MD5, LEAP, PEAP, EAP-FAST, and EAP-TLS.

In association with PEAP or EAP-FAST, ACS also supports EAP-MSCHAPv2, EAP-GTC, and EAP-TLS. For more information on authentication methods, see Authentication in ACS 5.4.

• Under the framework of the TACACS+ protocol, ACS helps to manage Cisco and non-Cisco

network devices such as switches, wireless access points, routers, and gateways. It also helps to manage services and entities such as dialup, Virtual Private Network (VPN), and firewall.

ACS is the point in your network that identifies users and devices that try to connect to your network. This identity establishment can occur directly by using the ACS internal identity repository for local user authentication or by using external identity repositories.

For example, ACS can use Active Directory as an external identity repository, to authenticate a user to grant the user access to the network. For more information about creating identities and supported identity services, see Chapter 8, “Managing Users and Identity Stores.”

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ACS Distributed Deployment

ACS provides advanced monitoring, reporting, and troubleshooting tools that help you administer and manage your ACS deployments. For more information on the monitoring, reporting, and troubleshooting capabilities of ACS, see Chapter 11, “Monitoring and Reporting in ACS.”.

For more information about using ACS for device administration and network access scenarios, see

Chapter 4, “Common Scenarios Using ACS.”

Cisco Secure ACS:

• Enforces access policies for VPN and wireless users.

• Provides simplified device administration.

• Provides advanced monitoring, reporting, and troubleshooting tools.

There are several changes and enhancements in ACS 5.4 compared to ACS 5.3. For a complete list of new and changed features, see:

http://www.cisco.com/en/US/docs/net_mgmt/cisco_secure_access_control_system/5.4/release/notes/ acs_54_rn.html.

ACS 4.x and 5.4 Replication

In ACS 4.x, you must select the database object types (or classes) you wish to replicate from primary instance to the secondary instance. When you replicate an object, a complete configuration copy is made on the secondary instance.

In ACS 5.4, any configuration changes made in the primary instance are immediately replicated to the secondary instance. Only the configuration changes made since the last replication are propagated to the secondary instance.

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Chapter 1 Introducing ACS 5.4

ACS 4.x did not provide incremental replication, only full replication, and there was service downtime for replication. ACS 5.4 provides incremental replications with no service downtime.

You can also force a full replication to the secondary instance if configuration changes do not replicate it. Full replication is used when a new secondary instance is registered and other cases when the replication gap between the secondary instance and the primary instance is significant.

Table 1 -1 lists some of the differences between ACS 4.x and 5.4 replication.

Table 1-1 Differences Between ACS 4.x and 5.4 Replication

ACS 4.x ACS 5.4

You can choose the data items to be replicated. You cannot choose the data items to be replicated.

Supports multi-level or cascading replication. Supports only a fixed flat replication. Cascading

Some data items, such as the external database configurations, are not replicated.

ACS Licensing Model

All data items, by default are replicated.

replication is not supported.

All data items are replicated except the database key, database certificate, and master keys. The server certificates, Certificate Signing Requests (CSRs), and private keys are replicated, but they are not shown in the interface.

For more information about setting up a distributed deployment, see Configuring System Operations,

page 17-1.

Note Replication does not work in ACS servers if you use the Cisco Overlay Transport Virtualization

technology in your Virtual Local Area Network.

Note Network Address Translation (NAT) is not supported in an ACS distributed deployment environment.

That is, if the network address of a primary or secondary instance is translated, then the database replication may not work properly, and it may display a shared secret mismatch error.

ACS Licensing Model

You must have a valid license to operate ACS; ACS prompts you to install a valid base license when you first access the web interface. Each server requires a unique base license in a distributed deployment.

For information about the types of licenses you can install, see Types of Licenses, page 18-34. For more information about licenses, see Licensing Overview, page 18-34.

ACS Management Interfaces

This section contains the following topics:

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ACS Management Interfaces

• ACS Web-based Interface, page 1-4

• ACS Command Line Interface, page 1-4

• ACS Programmatic Interfaces, page 1-5

ACS Web-based Interface

You can use the ACS web-based interface to fully configure your ACS deployment, and perform monitoring and reporting operations. The web interface provides a consistent user experience, regardless of the particular area that you are configuring.

The ACS web interface is supported on HTTPS-enabled Microsoft Internet Explorer versions from 6.x to 9.x and Mozilla Firefox versions from 3.x to 10.x.

The new web interface design and organization:

• Reflects the new policy model, which is organized around the user’s view of policy administration.

The new policy model is easier to use, as it separates the complex interrelationships that previously existed among policy elements.

For example, user groups, network device groups (NDGs), network access filters, network access profiles, and so on.

• Presents the configuration tasks in a logical order that you can follow for many common scenarios.

Chapter 1 Introducing ACS 5.4

For example, first you configure conditions and authorizations for policies in the Policy Elements drawer, and then you move on to the Policies drawer to configure the policies with the defined policy elements.

• Provides new page functionality, such as sorting and filtering lists of items.

See “Using the Web Interface” section on page 5-3 for more information.

ACS Command Line Interface

You can use the ACS command-line interface (CLI), a text-based interface, to perform some configuration and operational tasks and monitoring. Access to the ACS-specific CLI requires administrator authentication by ACS 5.4.

You do not need to be an ACS administrator or log into ACS 5.4 to use the non-ACS configuration mode. ACS configuration mode command sessions are logged to the diagnostics logs.

ACS 5.4 is shipped on the Cisco 1121 Secure Access Control System (CSACS-1121) or on the Cisco 3415 Secure Access Control System (CSACS-3415). The ADE-OS software supports these command modes:

• EXEC—Use these commands to perform system-level operation tasks. For example, install, start,

and stop application; copy files and installations; restore backups; and display information.

1-4

In addition, certain EXEC mode commands have ACS-specific abilities. For example, start an ACS instance, display and export ACS logs, and reset an ACS configuration to factory default settings. Such commands are specifically mentioned in the documentation

• ACS configuration—Use these commands to set the debug log level (enable or disable) for the ACS

management and runtime components, and show system settings.

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+ 648 hidden pages

Cisco Systems CSACS3415K9 User Manual

User Guide for Cisco Secure Access Control System 5.4

CONTENTS

Preface

Introducing ACS 5.4

Overview of ACS

ACS Distributed Deployment

ACS 4.x and 5.4 Replication

ACS Licensing Model

ACS Management Interfaces

ACS Web-based Interface

ACS Command Line Interface