From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gavin Hamill <gdh@acentral.co.uk>
Subject: Re: smtp
Date: Fri, 14 May 2004 20:47:23 +0100
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On Friday 14 May 2004 19:54, azeem ahmad wrote:
> hi
> here is the out put even after blocking all smtp
> ---------------------------------------------------------------------------
>------------------------------------------------------ 
>21:17:31.259275 
> 192.168.0.101.4730 > 207.24.89.66.smtp: S
> 556950735:556950735(0) win 64240 <mss 1460,nop,nop,sackOK> (DF)

Notice how all of these are your infected PC trying to talk to the outside 
world, and that there are no packets from the outside world to the infected 
PC? This will be due to your iptables commands blocking this from happening.. 
and given that the snapshot took place over 4 seconds, I would say you're 
quite safe :)

Yes, the infected PC will continue to spew out packets until it's fixed, but 
there is no danger, and your Internet bandwidth will no longer be affected.

Cheers,
Gavin.