Filtering Source Addresses on gw-internet

Tony Li tli at
Fri Aug 15 08:59:43 UTC 1997

jlewis at (Jon Lewis) writes:

> I vaguely remember hearing somewhere that routing to a loopback interface
> was better than null0 for feeding unwanted packets into a black hole.  Is
> that case perhaps not process switched? 

Nope, sorry.  Also process switched.

The hack to drop things fast is to find a lightly loaded LAN interface and
then forward it all to a non-existant system on that LAN.  Of course,
you'll have to manually configure an ARP entry for the bogon.


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