this is a 1721 router terminiating a t1. what i am looking for is not having to use an ip on the fe0 interface. is there any way to do this without assigning an ip to the inside address and just passing traffic through the interface from behind it? also are there any security implications behind this?
no ip address
ip address xxxxxxxxx 255.255.255.240
ip route 0.0.0.0 0.0.0.0 xxxxxxxx