Subject: Re: CVS commit: src/sys
To: None <email@example.com>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 12/06/2004 18:06:08
In message <20041206223330.GL13128@styx.org>, email@example.com writes:
>On Mon, Dec 06, 2004 at 01:53:43PM -0800, Matt Thomas wrote:
>> Actually, multiple loopback devices can be useful for tcpdump or
>> just keeping statistics. It'd be nice if you set a loopback device
>> as a null interface. (ifconfig lo1 media null) Then you have an
>> easy to collect counters. (you could do the same with a reject mode).
>Might be nice to have a ciscoish distinction between loopback
>and null interfaces: null0 is a bitbucket, lo0 is not.
I've written if_null, and use it daily -- multiple instances, so I can
run tcpdump separately on each -- but I need to check if it needs to be
updated before I commit it.
--Steve Bellovin, http://www.research.att.com/~smb