Cisco Systems Servers User manual

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Cisco Secure ACS 3.0 for Windows

2000/NT Servers User Guide

November 2001

Customer Order Number: DOC-7813751=

Text Part Number: 78-13751-01

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Cisco Secure ACS 3.0 for Windows 2000/NT Servers User Guide

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CONTENTS

Preface xxvii

Document Objectives

xxvii

Who Should Read This Guide xxvii

How This Guide is Organized xxviii

Conventions Used in This Guide xxx

Related Documentation xxxi

Obtaining Documentation xxxii

World Wide Web xxxii

Documentation CD-ROM xxxii

Ordering Documentation xxxii

Documentation Feedback xxxiii

Obtaining Technical Assistance xxxiii

Cisco.com xxxiii

Technical Assistance Center xxxiv

Cisco TAC Web Site xxxiv

Cisco TAC Escalation Center xxxv

CHAPTER

1 Overview of Cisco Secure ACS 1-1

The Cisco Secure ACS Paradigm 1-1

Cisco Secure ACS Specifications 1-2

System Performance Specifications 1-3

Cisco Secure ACS Windows Services 1-3

Contents

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AAA Server Functions and Concepts 1-4

Cisco Secure ACS and the AAA Client 1-5

AAA Protocols—TACACS+ and RADIUS 1-5

TACACS+ 1-6

RADIUS 1-6

Authentication 1-7

Authentication Considerations 1-8

Authentication and User Databases 1-8

Passwords 1-10

Other Authentication-Related Features 1-14

Authorization 1-15

Max Sessions 1-16

Dynamic Usage Quotas 1-16

Other Authorization-Related Features 1-17

Accounting 1-17

Other Accounting-Related Features 1-18

Administration 1-18

HTTP Port Allocation for Remote Administrative Sessions 1-19

Network Device Groups 1-20

Other Administration-Related Features 1-20

Cisco Secure ACS HTML Interface 1-21

About the Cisco Secure ACS HTML Interface 1-21

HTML Interface Layout 1-22

Uniform Resource Locator for the HTML Interface 1-24

Network Environments and Remote Administrative Sessions 1-24

Remote Administrative Sessions and HTTP Proxy 1-24

Remote Administrative Sessions through Firewalls 1-25

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Remote Administrative Sessions through a NAT Gateway 1-25

Accessing the HTML Interface 1-26

Logging Off the HTML Interface 1-26

Online Help and Online Documentation 1-27

Using Online Help 1-27

Using the Online Documentation 1-28

CHAPTER

2 Deploying Cisco Secure ACS 2-1

Basic Deployment Requirements for Cisco Secure ACS 2-2

System Requirements 2-2

Hardware Requirements 2-2

Operating System Requirements 2-3

Third-Party Software Requirements 2-3

Network Requirements 2-4

Basic Deployment Factors for Cisco Secure ACS 2-4

Network Topology 2-5

Dial-Up Topology 2-5

Wireless Network 2-8

Remote Access using VPN 2-11

Remote Access Policy 2-13

Security Policy 2-14

Administrative Access Policy 2-14

Separation of Administrative and General Users 2-16

Database 2-17

Number of Users 2-17

Type of Database 2-17

Contents

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Network Speed and Reliability 2-18

Suggested Deployment Sequence 2-18

CHAPTER

3 Setting Up the Cisco Secure ACS HTML Interface 3-1

Interface Design Concepts 3-2

User-to-Group Relationship 3-2

Per-User or Per-Group Features 3-2

User Data Configuration Options 3-3

Defining New User Data Fields 3-3

Advanced Options 3-4

Setting Advanced Options for the Cisco Secure ACS User Interface 3-6

Protocol Configuration Options for TACACS+ 3-7

Setting Options for TACACS+ 3-9

Protocol Configuration Options for RADIUS 3-10

Setting Protocol Configuration Options for (IETF) RADIUS 3-12

Setting Protocol Configuration Options for RADIUS (Cisco IOS/PIX) 3-14

Setting Protocol Configuration Options for RADIUS (Ascend) 3-14

Setting Protocol Configuration Options for RADIUS (Cisco VPN 3000) 3-15

Setting Protocol Configuration Options for RADIUS (Cisco VPN 5000) 3-16

Setting Protocol Configuration Options for RADIUS (Microsoft) 3-17

Setting Protocol Configuration Options for RADIUS (Nortel) 3-18

Setting Protocol Configuration Options for RADIUS (Juniper) 3-19

Setting Protocol Configuration Options for RADIUS (Cisco BBSM) 3-20

CHAPTER

4 Setting Up and Managing Network Configuration 4-1

About Distributed Systems 4-2

AAA Servers in Distributed Systems 4-3

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Default Distributed System Settings 4-3

Proxy in Distributed Systems 4-4

Fallback on Failed Connection 4-5

Character String 4-6

Stripping 4-6

Proxy in an Enterprise 4-6

Remote Use of Accounting Packets 4-7

Other Features Enabled by System Distribution 4-8

AAA Client Configuration 4-8

Adding and Configuring a AAA Client 4-9

Editing an Existing AAA Client 4-12

Deleting a AAA Client 4-14

AAA Server Configuration 4-15

Adding and Configuring a AAA Server 4-16

Editing a AAA Server Configuration 4-18

Deleting a AAA Server 4-20

Network Device Group Configuration 4-20

Adding a Network Device Group 4-21

Assigning an Unassigned AAA Client or AAA Server to an NDG 4-22

Reassigning a AAA Client or AAA Server to an NDG 4-23

Renaming a Network Device Group 4-23

Deleting a Network Device Group 4-24

Proxy Distribution Table Configuration 4-25

About the Proxy Distribution Table 4-25

Adding a New Proxy Distribution Table Entry 4-26

Sorting the Character String Match Order of Distribution Entries 4-28

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Editing a Proxy Distribution Table Entry 4-28

Deleting a Proxy Distribution Table Entry 4-29

CHAPTER

5 Setting Up and Managing Shared Profile Components 5-1

Downloadable PIX ACLs 5-2

About Downloadable PIX ACLs 5-2

Downloadable PIX ACL Configuration 5-3

Adding a Downloadable PIX ACL 5-3

Editing a Downloadable PIX ACL 5-4

Deleting a Downloadable PIX ACL 5-5

Network Access Restrictions 5-6

About Network Access Restrictions 5-6

Shared Network Access Restrictions Configuration 5-7

Adding a Shared Network Access Restriction 5-8

Editing a Shared Network Access Restriction 5-10

Deleting a Shared Network Access Restriction 5-12

Command Authorization Sets 5-12

About Command Authorization Sets 5-13

About Pattern Matching 5-14

Command Authorization Sets Configuration 5-14

Adding a Command Authorization Set 5-15

Editing a Command Authorization Set 5-17

Deleting a Command Authorization Set 5-17

CHAPTER

6 Setting Up and Managing User Groups 6-1

User Group Setup Features and Functions 6-2

Default Group 6-2

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Group TACACS+ Settings 6-2

Common User Group Settings 6-3

Enabling VoIP Support for a User Group 6-4

Setting Default Time of Day Access for a User Group 6-5

Setting Callback Options for a User Group 6-6

Setting Network Access Restrictions for a User Group 6-7

Setting Max Sessions for a User Group 6-11

Setting Usage Quotas for a User Group 6-13

Configuration-specific User Group Settings 6-15

Setting Token Card Settings for a User Group 6-17

Setting Enable Privilege Options for a User Group 6-18

Enabling Password Aging for the CiscoSecure User Database 6-20

Varieties of Password Aging Supported by Cisco Secure ACS 6-20

Password Aging Feature Settings 6-21

Enabling Password Aging for Users in Windows Databases 6-25

Setting IP Address Assignment Method for a User Group 6-26

Assigning a Downloadable PIX ACL to a Group 6-27

Configuring TACACS+ Settings for a User Group 6-28

Configuring a Shell Command Authorization Set for a User Group 6-30

Configuring a PIX Command Authorization Set for a User Group 6-32

Configuring IETF RADIUS Settings for a User Group 6-34

Configuring Cisco IOS/PIX RADIUS Settings for a User Group 6-36

Configuring Ascend RADIUS Settings for a User Group 6-37

Configuring Cisco VPN 3000 Concentrator RADIUS Settings for a User

Group

6-38

Configuring Cisco VPN 5000 Concentrator RADIUS Settings for a User

Group

6-39

Contents

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Configuring Microsoft RADIUS Settings for a User Group 6-41

Configuring Nortel RADIUS Settings for a User Group 6-42

Configuring Juniper RADIUS Settings for a User Group 6-44

Configuring Cisco BBSM RADIUS Settings for a User Group 6-45

Configuring Custom RADIUS VSA Settings for a User Group 6-46

Group Setting Management 6-48

Listing Users in a User Group 6-48

Resetting Usage Quota Counters for a User Group 6-49

Renaming a User Group 6-49

Saving Changes to User Group Settings 6-50

CHAPTER

7 Setting Up and Managing User Accounts 7-1

User Setup Features and Functions 7-2

About User Databases 7-3

Basic User Setup Options 7-4

Adding a Basic User Account 7-5

Setting Supplementary User Information 7-7

Setting a Separate CHAP/MS-CHAP/ARAP Password 7-8

Assigning a User to a Group 7-9

Setting User Callback Option 7-10

Assigning a User to a Client IP Address 7-11

Setting Network Access Restrictions for a User 7-12

Setting Max Sessions Options for a User 7-17

Setting User Usage Quotas Options 7-19

Setting Options for User Account Disablement 7-21

Assigning a PIX ACL to a User 7-22

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Advanced User Authentication Settings 7-23

TACACS+ Settings (User) 7-24

Configuring TACACS+ Settings for a User 7-24

Configuring a Shell Command Authorization Set for a User 7-26

Configuring a PIX Command Authorization Set for a User 7-29

Configuring the Unknown Service Setting for a User 7-31

Advanced TACACS+ Settings (User) 7-31

Setting Enable Privilege Options for a User 7-32

Setting TACACS+ Enable Password Options for a User 7-34

Setting TACACS+ Outbound Password for a User 7-35

RADIUS Attributes 7-36

Setting IETF RADIUS Parameters for a User 7-37

Setting Cisco IOS/PIX RADIUS Parameters for a User 7-38

Setting Ascend RADIUS Parameters for a User 7-39

Setting Cisco VPN 3000 Concentrator RADIUS Parameters for a

User

7-41

Setting Cisco VPN 5000 Concentrator RADIUS Parameters for a

User

7-42

Setting Microsoft RADIUS Parameters for a User 7-44

Setting Nortel RADIUS Parameters for a User 7-45

Setting Juniper RADIUS Parameters for a User 7-47

Setting BBSM RADIUS Parameters for a User 7-48

Setting Custom RADIUS Attributes for a User 7-49

User Management 7-51

Listing All Users 7-51

Finding a User 7-52

Disabling a User Account 7-53

Contents

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Deleting a User Account 7-54

Resetting User Session Quota Counters 7-55

Resetting a User Account after Login Failure 7-55

Saving User Settings 7-56

CHAPTER

8 Establishing Cisco Secure ACS System Configuration 8-1

Service Control 8-2

Determining the Status of Cisco Secure ACS Services 8-2

Stopping, Starting, or Restarting Services 8-2

Logging 8-3

Date Format Control 8-3

Setting the Date Format 8-4

Password Validation 8-4

Setting Password Validation Options 8-5

CiscoSecure Database Replication 8-6

About CiscoSecure Database Replication 8-6

Replication Process 8-8

Replication Frequency 8-10

Important Implementation Considerations 8-10

Database Replication Versus Database Backup 8-11

Database Replication Logging 8-12

Replication Options 8-13

Replication Components Options 8-13

Replication Scheduling Options 8-14

Replication Partners Options 8-15

Implementing Primary and Secondary Replication Setups on

Cisco Secure ACS Servers

8-16

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Configuring a Secondary Cisco Secure ACS Server 8-17

Replicating Immediately 8-18

Scheduling Replication 8-20

Disabling CiscoSecure Database Replication 8-23

Database Replication Event Error Alert Notification 8-23

RDBMS Synchronization 8-24

About RDBMS Synchronization 8-24

RDBMS Synchronization Components 8-25

About CSDBSync 8-25

About the accountActions Table 8-26

Cisco Secure ACS Database Recovery Using the accountActions Table 8-28

Reports and Event (Error) Handling 8-29

Preparing to Use RDBMS Synchronization 8-29

Considerations for Using CSV-Based Synchronization 8-30

Preparing for CSV-Based Synchronization 8-31

Configuring a System Data Source Name for RDBMS Synchronization 8-32

RDBMS Synchronization Options 8-33

RDBMS Setup Options 8-34

Synchronization Scheduling Options 8-34

Synchronization Partners Options 8-35

Performing RDBMS Synchronization Immediately 8-35

Scheduling RDBMS Synchronization 8-37

Disabling Scheduled RDBMS Synchronizations 8-39

Cisco Secure ACS Backup 8-40

About Cisco Secure ACS Backup 8-40

Backup File Locations 8-41

Directory Management 8-41

Contents

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Components Backed Up 8-41

Reports of Cisco Secure ACS Backups 8-42

Performing a Manual Cisco Secure ACS Backup 8-42

Scheduling Cisco Secure ACS Backups 8-43

Disabling Scheduled Cisco Secure ACS Backups 8-44

Cisco Secure ACS System Restore 8-45

About Cisco Secure ACS System Restore 8-45

Backup File Names and Locations 8-45

Components Restored 8-47

Reports of Cisco Secure ACS Restorations 8-47

Restoring Cisco Secure ACS from a Backup File 8-47

Cisco Secure ACS Active Service Management 8-48

System Monitoring 8-49

System Monitoring Options 8-49

Setting Up System Monitoring 8-50

Event Logging 8-51

Setting Up Event Logging 8-51

IP Pools Server 8-52

Allowing Overlapping IP Pools or Forcing Unique Pool Address Ranges 8-53

Refreshing the AAA Server IP Pools Table 8-55

Adding a New IP Pool 8-55

Editing an IP Pool Definition 8-56

Resetting an IP Pool 8-57

Deleting an IP Pool 8-58

IP Pools Address Recovery 8-59

Enabling IP Pool Address Recovery 8-59

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Contents

VoIP Accounting Configuration 8-60

Configuring VoIP Accounting 8-61

Cisco Secure ACS Certificate Setup 8-61

Background on Certification 8-62

EAP-TLS Setup Overview 8-63

Requirements for Certificate Enrollment 8-63

Generating a Request for a Certificate 8-64

Installing Cisco Secure ACS Certification with Manual Enrollment 8-66

Installing Cisco Secure ACS Certification with Automatic Enrollment 8-68

Performing Cisco Secure ACS Certification Update or Replacement 8-69

Certification Authority Setup 8-70

Trust Requirements and Models 8-71

Editing the Certificate Trust List 8-72

Adding a New CA Certificate to Local Certificate Storage 8-72

Global Authentication Setup 8-73

CHAPTER

9 Working with Logging and Reports 9-1

Logging Formats 9-1

Special Logging Attributes 9-2

Update Packets In Accounting Logs 9-3

About Cisco Secure ACS Logs and Reports 9-4

Accounting Logs 9-4

TACACS+ Accounting Log 9-5

TACACS+ Administration Log 9-6

RADIUS Accounting Log 9-7

VoIP Accounting Log 9-8

Failed Attempts Log 9-9

Contents

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Passed Authentications Log 9-10

Dynamic Cisco Secure ACS Administration Reports 9-10

Logged-In Users Report 9-11

Disabled Accounts Report 9-14

Cisco Secure ACS System Logs 9-15

ACS Backup and Restore Log 9-15

RDBMS Synchronization Log 9-16

Database Replication Log 9-16

Administration Audit Log 9-17

ACS Service Monitoring Log 9-18

Working with CSV Logs 9-19

CSV Log File Names 9-19

Enabling or Disabling a CSV Log 9-19

Viewing a CSV Report 9-20

Configuring a CSV Log 9-22

Working with ODBC Logs 9-25

Preparing to Use ODBC Logging 9-25

Configuring a System Data Source Name for ODBC Logging 9-26

Configuring an ODBC Log 9-27

Remote Logging 9-29

About Remote Logging 9-30

Remote Logging Options 9-31

Configuring a Central Logging Server 9-31

Enabling and Configuring Remote Logging 9-32

Disabling Remote Logging 9-33

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Service Logs 9-34

Services Logged 9-34

Configuring Service Logs 9-35

CHAPTER

10 Setting Up and Managing Administrators and Policy 10-1

Administrator Accounts 10-1

Administrator Privileges 10-2

Adding an Administrator Account 10-6

Editing an Administrator Account 10-7

Deleting an Administrator Account 10-9

Access Policy 10-10

Access Policy Options 10-10

Setting Up Access Policy 10-12

Session Policy 10-13

Session Policy Options 10-13

Setting Up Session Policy 10-14

Audit Policy 10-16

CHAPTER

11 Working with User Databases 11-1

CiscoSecure User Database 11-2

About External User Databases 11-4

Authenticating with External User Databases 11-5

Windows NT/2000 User Database 11-6

The Cisco Secure ACS Authentication Process with Windows NT/2000 User

Databases

11-7

Trust Relationships 11-8

Contents

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Windows Dial-up Networking Clients 11-9

About the Windows NT/2000 Dial-up Networking Client 11-9

About the Windows 95/98/Millennium Edition Dial-up Networking

Client

11-10

Windows NT/2000 Authentication 11-10

User-Changeable Passwords with Windows NT/2000 User Databases 11-12

Preparing Users for Authenticating with Windows NT/2000 11-12

Configuring a Windows NT/2000 External User Database 11-13

Generic LDAP 11-14

Cisco Secure ACS Authentication Process with a Generic LDAP User

Database

11-15

Multiple LDAP Instances 11-16

LDAP Organizational Units and Groups 11-17

Directed Authentications 11-17

LDAP Failover 11-17

Successful Previous Authentication with the Primary LDAP Server 11-18

Unsuccessful Previous Authentication with the Primary LDAP

Server

11-18

Configuring a Generic LDAP External User Database 11-19

Novell NDS Database 11-24

User Contexts 11-25

Novell NDS External User Database Options 11-27

Configuring a Novell NDS External User Database 11-28

ODBC Database 11-30

Cisco Secure ACS Authentication Process with an ODBC External User

Database

11-31

Preparing to Authenticate Users with an ODBC-Compliant Relational

Database

11-32

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Implementation of Stored Procedures for ODBC Authentication 11-33

Type Definitions 11-34

Microsoft SQL Server and Case-Sensitive Passwords 11-34

Sample Routine for Generating a PAP Authentication SQL Procedure 11-35

Sample Routine for Generating an SQL CHAP Authentication

Procedure

11-36

PAP Authentication Procedure Input 11-36

PAP Procedure Output 11-37

CHAP/MS-CHAP/ARAP Authentication Procedure Input 11-38

CHAP/MS-CHAP/ARAP Procedure Output 11-38

Result Codes 11-39

Configuring a System Data Source Name for an ODBC External User

Database

11-40

Configuring an ODBC External User Database 11-41

LEAP Proxy RADIUS Server Database 11-44

Configuring a LEAP Proxy RADIUS Server External User Database 11-45

Token Server User Databases 11-47

About Token Servers and Cisco Secure ACS 11-48

Token Servers and ISDN 11-48

RADIUS-Enabled Token Servers 11-49

About RADIUS-Enabled Token Servers 11-49

Token Server RADIUS Authentication Request and Response

Contents

11-50

Configuring a RADIUS Token Server External User Database 11-50

Token Servers with Vendor-Proprietary Interfaces 11-53

About Token Servers with Proprietary Interfaces 11-53

Configuring a SafeWord Token Server External User Database 11-53

Contents

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Configuring an AXENT Token Server External User Database

AXENT

11-55

Configuring an RSA SecurID Token Server External User Database 11-56

Deleting an External User Database Configuration 11-58

CHAPTER

12 Administering External User Databases 12-1

Unknown User Processing 12-1

Known, Unknown, and Cached Users 12-2

General Authentication Request Handling and Rejection Mode 12-3

Authentication Request Handling and Rejection Mode with the

Windows NT/2000 User Database

12-4

Windows Authentication with a Domain Specified 12-4

Windows Authentication with Domain Omitted 12-5

Performance of Unknown User Authentication 12-6

Added Latency 12-6

Authentication Timeout Value on AAA clients 12-6

Network Access Authorization 12-7

Unknown User Policy 12-7

Database Search Order 12-8

Configuring the Unknown User Policy 12-8

Turning off External User Database Authentication 12-9

Database Group Mappings 12-10

Group Mapping by External User Database 12-10

Creating a Cisco Secure ACS Group Mapping for a Token Server, ODBC

Database, or LEAP Proxy RADIUS Server Database

12-12

Group Mapping by Group Set Membership 12-13

Group Mapping Order 12-13

No Access Group for Group Set Mappings 12-14

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