Subject: Re: your packet filter thang...
To: None <>
From: Charles M. Hannum <>
List: tech-kern
Date: 03/01/1995 06:23:32
   Firstly, I don't see why changing the filtering rules currently in
   use should require you to reload the entire ruleset.  To change a
   single rule then requires you to `disconnect' from the network
   (ifconfig down), remove the BPF rules, load a new set, and ifconfig

Those two statements are unrelated.  The ability to install a new
filter program is quite distinct from the actual mechanics of
uploading the program to the kernel.  I don't see why it should ever
be necessary to turn the network interface off.