Cisco IOS Firewall Software

On a Cisco router 831 how can I tell if we have 'Cisco IOS Firewall
Software'?

In the white paper 'Cisco 800 Series Routers, Internet Security for Small
Businesses' it says the following:

"Cisco IOS Software, the operating system on all Cisco routers, provides the
intelligence behind the Internet and the firewall capabilities in
router-based, integrated firewall solutions. Cisco IOS Firewall Software, an
optional feature set specifically for integrated firewall applications,
enriches the basic security capabilities of IOS software with context-based
access control (CBAC), a connection-oriented stateful packet inspection
system. "

Given then that Cisco IOS Firewall Software is an optional feature how can
we tell if our current unit has it or not?

Thanks in advance,

Tom Edelbrok


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