On Friday 02 May 2003 17:58, openings wrote:
> Dear folks
>
>
> With U32 filter, I can filter packets with it's packet header.
>
> In linux, I wonder if Layer-7 filtering is possible.
>
> I want to filter packets that include specific pattern in it's payload(not
> header, data part).
>
> ex) Packets that include "aaa.exe" text pattern in it's data part.
>
> If it is possible, mail traffic that include specific text pattern can be
> filtered.
>
> I thought that above function is very useful.
>
> In Linux, is it possible?
Iptables can filter based on text in a packet. At the same time, you can mark
the packet and that mark can be used with the fw filter.
Stef
--
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"Using Linux as bandwidth manager"
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