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

1 Oct 1999

...
deny   ip host 0.0.0.0 any log
    deny   ip 127.0.0.0 0.255.255.255 any log
    deny   ip 10.0.0.0 0.255.255.255 any log
    deny   ip 172.16.0.0 0.15.255.255 any log
    deny   ip 192.168.0.0 0.0.255.255 any log
    deny   ip xxx.xxx.xxx.0 0.0.0.255 any log
    deny   ip 224.0.0.0 31.255.255.255 any log
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.