From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Alex Bligh <alex@alex.org.uk>
Cc: Mail List - Netfilter <netfilter@vger.kernel.org>
Subject: Re: Ignore tcp checksum on ip_conntrack
Date: Mon, 20 Sep 2010 12:28:58 +0200 [thread overview]
Message-ID: <4C97376A.6040208@netfilter.org> (raw)
In-Reply-To: <1E6DC90B5FEECCA9D7482842@Ximines.local>
On 16/09/10 17:55, Alex Bligh wrote:
> ip_conntrack ditches packets for masquerading etc if their ip checksum
> is wrong.
>
> Is it possible to disable this behaviour on kernel 2.6.18 (I know, it's
> old)? I have something that like producing tcp packets with invalid
> checksums.
# echo 0 > /proc/sys/net/netfilter/nf_conntrack_checksum
If you use ip_conntrack instead of nf_conntrack you have to set
ip_conntrack_checksum to 0.
# echo 0 > /proc/sys/net/ipv4/netfilter/ip_conntrack_checksum
prev parent reply other threads:[~2010-09-20 10:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-16 15:55 Ignore tcp checksum on ip_conntrack Alex Bligh
2010-09-20 10:28 ` Pablo Neira Ayuso [this message]
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