Cisco Systems ASA 5500 Manual De Usuario

 is based on the network shown in 

. It creates two service policies. The first 

policy, csc_out_policy, is applied to the inside interface and uses the csc_out access list to ensure that 
all outbound requests for FTP and POP3 are scanned. The csc_out access list also ensures that HTTP 
connections from inside to networks on the outside interface are scanned but it includes a deny ACE to 
exclude HTTP connections from inside to servers on the DMZ network.

The second policy, csc_in_policy, is applied to the outside interface and uses the csc_in access list to 
ensure that requests for SMTP and HTTP originating on the outside interface and destined for the DMZ 
network are scanned by the CSC SSM. Scanning HTTP requests protects the web server from HTTP file 
uploads.

hostname(config)# access-list csc_out permit tcp 192.168.10.0 255.255.255.0 any eq 21

hostname(config)# access-list csc_out deny tcp 192.168.10.0 255.255.255.0 192.168.20.0 255.255.255.0 eq 80

hostname(config)# access-list csc_out permit tcp 192.168.10.0 255.255.255.0 any eq 80

hostname(config)# access-list csc_out permit tcp 192.168.10.0 255.255.255.0 any eq 110

hostname(config)# class-map csc_outbound_class

hostname(config-cmap)# match access-list csc_out

hostname(config)# policy-map csc_out_policy

hostname(config-pmap)# class csc_outbound_class

hostname(config-pmap-c)# csc fail-close

hostname(config)# service-policy csc_out_policy interface inside

hostname(config)# access-list csc_in permit tcp any 192.168.20.0 255.255.255.0 eq 25

hostname(config)# access-list csc_in permit tcp any 192.168.20.0 255.255.255.0 eq 80

hostname(config)# class-map csc_inbound_class

hostname(config-cmap)# match access-list csc_in

hostname(config)# policy-map csc_in_policy

hostname(config-pmap)# class csc_inbound_class

hostname(config-pmap-c)# csc fail-close

hostname(config)# service-policy csc_in_policy interface outside

FTP inspection must be enabled for CSC SSM to scan files transferred by FTP. FTP inspection is enabled 
by default.

To check the status of an SSM, use the show module command.

The follow example output is from an adaptive security appliance with a CSC SSM installed. The Status 
field indicates the operational status of the SSM. An SSM operating normally has a status of “Up” in the 
output of the show module command. While the adaptive security appliance transfers an application 
image to the SSM, the Status field in the output reads “Recover”. For more information about possible 
statuses, see the entry for the show module command in the 

Cisco Security Appliance Command 

.