Cisco ASA 5505 - Manual (Page 1184)

55-20
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 55 Configuring the Botnet Traffic Filter
Configuration Examples for the Botnet Traffic Filter
hostname(config-pmap-c)# inspect dns preset_dns_map dynamic-filter-snoop
hostname(config-pmap-c)# service-policy dynamic-filter_snoop_policy interface outside
hostname(config)# dynamic-filter enable interface outside
hostname(config)# dynamic-filter drop blacklist interface outside
The following recommended example configuration for multiple context mode enables the Botnet
Traffic Filter for two contexts:
Example 55-2 Multiple Mode Botnet Traffic Filter Recommended Example
hostname(config)# dynamic-filter updater-client enable
hostname(config)# changeto context context1
hostname/context1(config)# dynamic-filter use-database
hostname/context1(config)# class-map dynamic-filter_snoop_class
hostname/context1(config-cmap)# match port udp eq domain
hostname/context1(config-cmap)# policy-map dynamic-filter_snoop_policy
hostname/context1(config-pmap)# class dynamic-filter_snoop_class
hostname/context1(config-pmap-c)# inspect dns preset_dns_map dynamic-filter-snoop
hostname/context1(config-pmap-c)# service-policy dynamic-filter_snoop_policy interface
outside
hostname/context1(config)# dynamic-filter enable interface outside
hostname/context1(config)# dynamic-filter drop blacklist interface outside
hostname/context1(config)# changeto context context2
hostname/context2(config)# dynamic-filter use-database
hostname/context2(config)# class-map dynamic-filter_snoop_class
hostname/context2(config-cmap)# match port udp eq domain
hostname/context2(config-cmap)# policy-map dynamic-filter_snoop_policy
hostname/context2(config-pmap)# class dynamic-filter_snoop_class
hostname/context2(config-pmap-c)# inspect dns preset_dns_map dynamic-filter-snoop
hostname/context2(config-pmap-c)# service-policy dynamic-filter_snoop_policy interface
outside
hostname/context2(config)# dynamic-filter enable interface outside
hostname/context2(config)# dynamic-filter drop blacklist interface outside
Other Configuration Examples
The following sample configuration adds static entries are to the blacklist and to the whitelist. Then, it
monitors all port 80 traffic on the outside interface, and drops blacklisted traffic. It also treats greylist
addresses as blacklisted addresses.
hostname(config)# dynamic-filter updater-client enable
hostname(config)# changeto context context1
hostname/context1(config)# dynamic-filter use-database
hostname/context1(config)# class-map dynamic-filter_snoop_class
hostname/context1(config-cmap)# match port udp eq domain
hostname/context1(config-cmap)# policy-map dynamic-filter_snoop_policy
hostname/context1(config-pmap)# class dynamic-filter_snoop_class
hostname/context1(config-pmap-c)# inspect dns preset_dns_map dynamic-filter-snoop
hostname/context1(config-pmap-c)# service-policy dynamic-filter_snoop_policy interface
outside
hostname/context1(config-pmap-c)# dynamic-filter blacklist
hostname/context1(config-llist)# name bad1.example.com
hostname/context1(config-llist)# name bad2.example.com