From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Stephen Isard" <y8ju2p902@sneakemail.com>
Subject: Re: iptables rules for cups printer discovery
Date: Thu, 14 Aug 2008 19:01:23 -0400 (EDT)
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On Thu, 14 Aug 2008, Jan Engelhardt jengelh-at-medozas.de |netfilter| wrote:
>
> On Thursday 2008-08-14 16:54, Stephen Isard wrote:
>>
>>> You could write a layer-4 connection tracker
>>
>> Maybe you could, but I'm not sure that I could :-)  At what level
>> would this operate?  Kernel?
>
> Kernel. Parallel to things like nf_conntrack_ftp.

Mm.  I'm sure it would be educational to try, but I think I may just do 
my printer discovery by social engineering - ask the departmental 
computing officers for the ip numbers.