From: Rusty Russell <rusty@rustcorp.com.au>
To: fabbione@fabbione.net
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [Possibly OT] ipt_unclean.c on kernel-2.4.7-9
Date: Tue, 28 Aug 2001 09:43:10 +1000 [thread overview]
Message-ID: <E15bW2B-0001Ur-00@localhost> (raw)
In-Reply-To: Your message of "Mon, 27 Aug 2001 12:51:24 +0200." <3B8A262C.82ED7793@ted.ericsson.dk>
In message <3B8A262C.82ED7793@ted.ericsson.dk> you write:
> Hi gurus,
> I've possibly found a bug in the iptables unclean match support
> but I was not able to find the email of the mantainer so I'm posting
> here....
>
> the module is incorrectly matching ftp session. Ex:
>
> iptables -j DROP -A INPUT --match unclean
> iptables -j ACCEPT -A INPUT -p tcp --dport 21
>
> in this case all my packets directed to the ftp server where dropped by
> the
> "unclean" match and this make impossible to open ftp session.
Please do not do this. "unclean" should be renamed "interesting": you
should log these packets, but probably not drop them, otherwise some
things may break.
Like ECN...
Cheers,
Rusty.
--
Premature optmztion is rt of all evl. --DK
next prev parent reply other threads:[~2001-08-28 9:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-27 10:51 [Possibly OT] ipt_unclean.c on kernel-2.4.7-9 Fabbione
2001-08-27 23:43 ` Rusty Russell [this message]
2001-08-28 10:49 ` Fabbione
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