Cisco Systems Configuration Examples for the ASA CX Module

30-32
Cisco ASA Series Firewall CLI Configuration Guide
Chapter30 Configuring the ASA CX Module
Configuration Examples for the ASA CX Module
2. Check the output of the show service-policy cxsc command to see if any packets were proxied.
3. Perform a packet capture on the backplane, and check to see if traffic is being redirected on the
correct configured port. See the “Capturing Module Traffic” section on page30-30. You can check
the configured port using the show running-config cxsc command or the show asp table classify
domain cxsc-auth-proxy command.
Note If you have a connection between hosts on two ASA interfaces, and the ASA CX service policy is only
configured for one of the interfaces, then all traffic between these hosts is sent to the ASA CX module,
including traffic orginiating on the non-ASA CX interface (the feature is bidirectional). However, the
ASA only performs the authentication proxy on the interface to which the service policy is applied,
because this feature is ingress-only.
Example3 0-1 Make sure port 2000 is used consistently:
1. Check the authentication proxy port:
ciscoasa# show running-config cxsc
cxsc auth-proxy port 2000
2. Check the authentication proxy rules:
ciscoasa# show asp table classify domain cxsc-auth-proxy
Input Table
in id=0x7ffed86cc470, priority=121, domain=cxsc-auth-proxy, deny=false
hits=0, user_data=0x7ffed86ca220, cs_id=0x0, flags=0x0, protocol=6
src ip/id=0.0.0.0, mask=0.0.0.0, port=0
dst ip/id=192.168.0.100, mask=255.255.255.255, port=2000, dscp=0x0
input_ifc=inside, output_ifc=identity
3. In the packet captures, the redirect request should be going to destination port 2000.
Configuration Examples for the ASA CX Module
The following example diverts all HTTP traffic to the ASA CX module, and blocks all HTTP traffic if
the ASA CX module card fails for any reason:
ciscoasa(config)# access-list ASACX permit tcp any any eq port 80
ciscoasa(config)# class-map my-cx-class
ciscoasa(config-cmap)# match access-list ASACX
ciscoasa(config-cmap)# policy-map my-cx-policy
ciscoasa(config-pmap)# class my-cx-class
ciscoasa(config-pmap-c)# cxsc fail-close auth-proxy
ciscoasa(config-pmap-c)# service-policy my-cx-policy global
The following example diverts all IP traffic destined for the 10.1.1.0 network and the 10.2.1.0 network
to the ASA CX module, and allows all traffic through if the ASA CX module fails for any reason.
ciscoasa(config)# access-list my-cx-acl permit ip any 10.1.1.0 255.255.255.0
ciscoasa(config)# access-list my-cx-acl2 permit ip any 10.2.1.0 255.255.255.0
ciscoasa(config)# class-map my-cx-class
ciscoasa(config-cmap)# match access-list my-cx-acl
ciscoasa(config)# class-map my-cx-class2
ciscoasa(config-cmap)# match access-list my-cx-acl2
ciscoasa(config-cmap)# policy-map my-cx-policy
ciscoasa(config-pmap)# class my-cx-class
ciscoasa(config-pmap-c)# cxsc fail-open auth-proxy