RE: Martian list of IP's to block???

Most of us can't "ip verify unicast reverse-path" our upstreams.

I think you can run it on low/mid-range Cisco routers with IOS 12, as CEF is not 75xx privilege any more, although I have not tested myself.

...

Routing those networks to nul0 and turning 'ip verify unicast reverse-path' on CEF-enabled Cisco routers does this without CPU load or does not ?

Rubens Kuhl Jr.