I am doing a security assessment of an organization that uses 871/881 routers with the firewall features enabled. I see the following commands defining packet inspection done by the firewall software.
ip inspect name inet-users tcp
ip inspect name inet-users udp
ip inspect name inet-users icmp
What I am trying to define is the inspect name "inet-users". It is obviously a constant defined by IOS as it is not defined anywhere in the configuration file like any other "variable" and does not generate an error.
What does "inet-users" define? I'm assuming it is all users using the interface(s) where the inspect commands are used, but is that correct?
The Cisco IOS manuals do not contain a reference to "inet-users" hence why I'm here asking.
"inet-users" is the name your the firewall-configuration. You can choose any name you want for this name. Mine are most often just named "FW" ... The name of the inspect-configuration is assigned to an interface to complete the firewall-config:
ip inspect name FW tcp
ip inspect name FW udp
ip inspect name FW icmp
ip inspect name FW ftp
interface dialer 0
ip inspect FW out
There is much more to configure for the firewall. You find many information on it by searching for the term CBAC (context based access control).
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