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From: "Jörg Harmuth" <harmuth@mnemon.de>
To: netfilter@lists.netfilter.org
Subject: Re: iptables & ebtables
Date: Fri, 14 Oct 2005 15:53:32 +0200	[thread overview]
Message-ID: <434FB85C.6020109@mnemon.de> (raw)
In-Reply-To: <20051014040552.1FA9A4E89@smtp.263.net>

bend chen wrote:
> HI,netfilter-user
> 
> 
> I  have some question，pleas help me.
> 1\if I used ebtables process a package,but need iptables can't process THIS package,how can I do?

Sorry, I can't parse this sentence

> 2\can i use iptables drop some LENGTH package, can I mach : if the package > 128K then DROP?

Yes. Use the length match, e.g.

iptables -A INPUT -p tcp -m length --length --length 1501: -j DROP

will send all tcp-packets with more than 1500 bytes to nirvana. BTW, 
neither tcp (1500 bytes max) nor udp (65 KBytes max) will ever generate 
packets of the size you mentioned above. ICMP packets are even smaller - 
i don't recall max size at the moment.

HTH,

Joerg





  reply	other threads:[~2005-10-14 13:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-14  4:07 iptables & ebtables bend chen
2005-10-14 13:53 ` Jörg Harmuth [this message]
2005-10-14 18:14   ` Henrik Nordstrom
  -- strict thread matches above, loose matches on Subject: below --
2005-10-15  8:28 bend chen
2005-10-16 17:38 ` Henrik Nordstrom

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