1 © 2005 Cisco Systems, Inc. All rights reserved. 111 © 2004, Cisco Systems, Inc. All rights reserved.

2 © 2005 Cisco Systems, Inc. All rights reserved. Network Security 1 Module 6 – Configure Trust and Identity at Layer 3

3 © 2005 Cisco Systems, Inc. All rights reserved. Learning Objectives 6.1 Cisco IOS Firewall Authentication Proxy 6.2 Introduction to PIX Security Appliance AAA Features 6.3 Configure AAA on the PIX Security Appliance

4 © 2005 Cisco Systems, Inc. All rights reserved. Module 6 – Configure Trust and Identity at Layer Cisco IOS Firewall Authentication Proxy

5 © 2005 Cisco Systems, Inc. All rights reserved. What Is the Authentication Proxy? HTTP, HTTPS, FTP, and Telnet authentication Provides dynamic, per-user authentication and authorization via TACACS+ and RADIUS protocols Once authenticated, all types of application traffic can be authorized Works on any interface type for inbound or outbound traffic

6 © 2005 Cisco Systems, Inc. All rights reserved. RADIUSTACACS+ Cisco Secure ACS UNIX Cisco Secure ACS NT/2000 Supported AAA Servers TACACS + Freeware LucentLucent Cisco Secure ACS UNIX Cisco Secure ACS NT/2000

7 © 2005 Cisco Systems, Inc. All rights reserved. Create auth-proxy Service in the Cisco Secure ACS Enter the new service: auth-proxy.

8 © 2005 Cisco Systems, Inc. All rights reserved. aaa new-model Enable AAA Enables the AAA functionality on the router (default = disabled) Router(config)#

9 © 2005 Cisco Systems, Inc. All rights reserved. aaa authentication login default method1 [method2] Specify Authentication Protocols Defines the list of authentication methods that will be used Methods: TACACS+, RADIUS, or both Router(config)# aaa authentication login default group tacacs+ Router(config)#

10 © 2005 Cisco Systems, Inc. All rights reserved. aaa authorization auth-proxy default method1 [method2] Specify Authorization Protocols Use the auth-proxy keyword to enable authorization proxy for AAA methods Methods: TACACS+, RADIUS, or both Router(config)# Router(config)# aaa authorization auth-proxy default group tacacs+

11 © 2005 Cisco Systems, Inc. All rights reserved. tacacs-server host ip_addr Define a TACACS+ Server and Its Key Specifies the TACACS+ server IP address Specifies the TACACS+ server key Router(config)# Router(config)# tacacs-server host Router(config)# tacacs-server key secretkey tacacs-server key string Router(config)#

12 © 2005 Cisco Systems, Inc. All rights reserved. Define a RADIUS Server and Its Key Specifies the RADIUS server IP address Specifies the RADIUS server key Router(config)# radius-server host Router(config)# radius-server key secretkey radius-server host ip_addr Router(config)# radius-server key string Router(config)#

13 © 2005 Cisco Systems, Inc. All rights reserved. Router(config)# access-list 111 permit tcp host eq tacacs host Router(config)# access-list 111 permit icmp any any Router(config)# access-list 111 deny ip any any Router(config)# interface ethernet0/0 Router(config-if)# ip access-group 111 in Allow AAA Traffic to the Router Create an ACL to permit TACACS+ traffic from the AAA server to the firewall Source address = AAA server Destination address = interface where the AAA server resides May want to permit ICMP Deny all other traffic Apply the ACL to the interface on the side where the AAA server resides

14 © 2005 Cisco Systems, Inc. All rights reserved. Router(config)# ip http server Router(config)# ip http authentication aaa Enable the Router HTTP or HTTPS Server Enables the HTTP server on the router Sets the HTTP server authentication method to AAA Proxy uses HTTP server for communication with a client ip http server Router(config)# ip http authentication aaa Router(config)# ip http secure-server Router(config)# Enables the HTTPS server on the router

15 © 2005 Cisco Systems, Inc. All rights reserved. ip auth-proxy {inactivity-timer min | absolute-timer min} Authentication inactivity timer in minutes (default = 60 minutes) Absolute activity timer in minutes (default = 0 minutes) Set Global Timers Router(config)# Router(config)# ip auth-proxy inactivity- timer 120

16 © 2005 Cisco Systems, Inc. All rights reserved. Router(config)# ip auth-proxy name aprule http Router(config)# interface ethernet0 Router(config-if)# ip auth-proxy aprule Define and Apply Authentication Proxy Rules Creates an authorization proxy rule Applies an authorization proxy rule to an interface For outbound authentication, apply to inside interface For inbound authentication, apply to outside interface ip auth-proxy name auth-proxy-name {ftp | http | telnet} [inactivity-time min] [absolute- timer min][list {acl | acl-name}] Router(config)# ip auth-proxy auth-proxy-name Router(config-if)#

17 © 2005 Cisco Systems, Inc. All rights reserved. Authentication Proxy Rules with ACLs Creates an authorization proxy rule with an access list ip auth-proxy name auth-proxy-name http list {acl-num | acl-name} Router(config)# Router(config)# ip auth-proxy name aprule http list 10 Router(config)# access-list 10 permit Router(config)# interface ethernet0 Router(config-if)# ip auth-proxy aprule

18 © 2005 Cisco Systems, Inc. All rights reserved. Module 6 – Configure Trust and Identity at Layer Introduction to PIX Security Appliance AAA Features

19 © 2005 Cisco Systems, Inc. All rights reserved. Types of Authentication

20 © 2005 Cisco Systems, Inc. All rights reserved. Types of Authorization

21 © 2005 Cisco Systems, Inc. All rights reserved. Types of Accounting

22 © 2005 Cisco Systems, Inc. All rights reserved. AAA Server Support

23 © 2005 Cisco Systems, Inc. All rights reserved. Module 6 – Configure Trust and Identity at Layer Configure AAA on the PIX Security Appliance

24 © 2005 Cisco Systems, Inc. All rights reserved. Types of Access Authentication

25 © 2005 Cisco Systems, Inc. All rights reserved. Authentication Configuration Steps

26 © 2005 Cisco Systems, Inc. All rights reserved. Add Users to the Local User Database

27 © 2005 Cisco Systems, Inc. All rights reserved. Cut-Through Proxy

28 © 2005 Cisco Systems, Inc. All rights reserved. Authentication of Non-Telnet, FTP, or HTTP Traffic

29 © 2005 Cisco Systems, Inc. All rights reserved. User Authorization

30 © 2005 Cisco Systems, Inc. All rights reserved. Downloadable ACLs

31 © 2005 Cisco Systems, Inc. All rights reserved. Enable Accounting Match

32 © 2005 Cisco Systems, Inc. All rights reserved. Admin Accounting

33 © 2005 Cisco Systems, Inc. All rights reserved. Command Accounting

34 © 2005, Cisco Systems, Inc. All rights reserved.