How about blocking packets with a source address of the internal networks and rfc1918 networks coming in on the serial interface and vice versa on the ethernet interface.
-- Willie On Mon, 4 Nov 2002, Naman Latif wrote: > Hi All, > > I wanted some suggestions\practical experiences for protecting a > Firewall wall at the Perimeter Router Level. > > We have a PIX Firewall connected to our Cisco Router, which is connected > to the Internet. Should there be any IOS Firewall Rules in the Router, > other than blocking Telnet,FTP etc to the Firewall itself ? > > PIX will be doing NAT, protecting DMZ machines, and IPSec connections. > > Regards \\ Naman >
