I have 2 x 2501 routers, each with 1 ethernet, and 2
serial.

I was wondering how I would go about useing the
routers back to 
back to create a firewall for my cable modem network


@home---e0(router)s0---s0(router)e0---(switch)---(pc)

possible issues:
-use nat?
-ip unnumbered on serial interfaces?


the reason I cant just use one router, is that i have
only one 
ethernet per router.
also, i realize that this is goofy, and that a
software 
firewall would be easier, I am also trying to get
familiar with 
the ios firewall feature set.




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