GNS3 Router Based firewall


In the attached file I wanted to set up a firewall and test it.

The firewall interface fa0/0 ip address :10.100.100.1, the fa0/1 ip is:20.100.100.1
I would like to set up a router based firewall using SDM. I have tried it but then (the firewall locked me out) I couldn't use SDM through my computer, since I have a loopback Interface IP:10.100.100.50 and the default gateway pointing to 10.100.100.1  (which is the IP address of fa0/0 of the firewall).

That would help if there is a walkthrough steps on how to configure a firewall on this Lab.

Thanks
Firewall-SDM.png
jskfanAsked:
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RunningGagCommented:
There are a number of elements to the firewall in the router, but this should get you started:

https://www.cisco.com/en/US/products/sw/secursw/ps1018/prod_configuration_examples_list.html#anchor2
jskfanAuthor Commented:
I don't see a link about configuring a cisco router as a firewall using SDM.
RunningGagCommented:
You generally won't.  Most of Cisco's configuration guides are command line based.  But here's some further reading:

http://www.cisco.com/en/US/docs/routers/access/cisco_router_and_security_device_manager/24/express/software/user/guide/ES.html#wp1047004

And, a little something from TechRepublic that might help:

http://content.techrepublic.com.com/2346-1035_11-91987-2.html

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jskfanAuthor Commented:
thanks. I will check this up later.
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