From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jay L.T. Cornwall" <jay@esuna.co.uk>
Subject: Re: ipt_owner and ICMP
Date: Sun, 19 Mar 2006 00:26:35 +0000
Message-ID: <441CA53B.6010606@esuna.co.uk>
References: <004801c64aba$9e81b170$0301a8c0@asp> <441CA43E.1040706@zoomnet.ro>
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Alexandru Dragoi wrote:

>> This works fine for UDP and TCP, but my outgoing ICMP packets never match
>> the rule. I understand why incoming ICMP should fail to match, but why are
>> outgoing packets missing the filter?

> I think this is because icmp packets are just generated and sent away by
> some part of the kernel after it received a syscall from a program with
> uid 0 (only root can use icmp).

Oh, of course! *slaps head*

Ping was running as setuid root. I feel silly now, thanks for pointing 
that out. :)

-- 
Jay L.T. Cornwall, http://www.esuna.co.uk/~jay/
PhD Student
Imperial College London