This sample configuration initially blocks traffic from a host device (at 18.104.22.168) on the external network to all devices on the internal network until you perform browser authentication with the use of authentication proxy. The access list passed down from the server (permit tcp|ip|icmp any any) adds dynamic entries post-authorization to access list 115 that temporarily allow access from the host device to the internal network.
There are no specific requirements for this document.
The information in this document is based on these software and hardware versions:
Cisco IOS® Software Release 12.0.7.T
Cisco 3640 router
Note: The ip auth-proxy command was introduced in Cisco IOS Software Release 12.0.5.T. This configuration was tested with Cisco IOS Software Release 12.0.7.T.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Refer to the Cisco Technical Tips Conventions for more information on document conventions.
In this section, you are presented with the information to configure the features described in this document.
This document uses this network setup:
This document uses this configuration:
Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname security-3640 ! !--- Turn on authentication. aaa new-model !--- Define the server group and servers for TACACS+ or RADIUS. aaa group server tacacs+|radius RTP server 22.214.171.124 ! !--- Define what you need to authenticate. aaa authentication login default group RTP none aaa authorization exec default group RTP none aaa authorization auth-proxy default group RTP enable secret 5 $1$H9zZ$z9bu5HMy4NTtjsvIhltGT0 enable password ww ! ip subnet-zero ! !--- You want the router name to appear as banner. ip auth-proxy auth-proxy-banner !--- You want the access-list entries to timeout after 10 minutes. ip auth-proxy auth-cache-time 10 !--- You define the list-name to be associated with the interface. ip auth-proxy name list_a http ip audit notify log ip audit po max-events 100 cns event-service server ! process-max-time 200 ! interface FastEthernet0/0 ip address 126.96.36.199 255.255.255.0 no ip directed-broadcast no mop enabled ! interface FastEthernet1/0 ip address 188.8.131.52 255.255.255.0 !--- Apply the access-list to the interface. ip access-group 115 in no ip directed-broadcast !--- Apply the auth-proxy list-name. ip auth-proxy list_a ! ip classless ip route 184.108.40.206 255.255.255.0 220.127.116.11 !--- Turn on the http server and authentication. ip http server ip http authentication aaa ! !--- This is our access-list for auth-proxy testing - !--- it denies only one host, 18.104.22.168, access - to minimize disruption !--- to the network during testing. access-list 115 permit tcp host 22.214.171.124 host 126.96.36.199 eq www access-list 115 deny icmp host 188.8.131.52 any access-list 115 deny tcp host 184.108.40.206 any access-list 115 deny udp host 220.127.116.11 any access-list 115 permit udp any any access-list 115 permit tcp any any access-list 115 permit icmp any any dialer-list 1 protocol ip permit dialer-list 1 protocol ipx permit ! !--- Define the server(s). tacacs-server host 18.104.22.168 tacacs-server key cisco radius-server host 22.214.171.124 radius-server key cisco ! line con 0 transport input none line aux 0 line vty 0 4 password ww ! ! end
There is currently no verification procedure available for this configuration.
This section provides information you can use in order to troubleshoot your configuration.
For these commands, along with other troubleshooting information, refer to Troubleshooting Authentication Proxy.
Note: Refer to Important Information on Debug Commands before you issue debug commands.
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Refer to Cisco Technical Tips Conventions for information on conventions used in this document.