From: Martin Devera <martin.devera@cdi.cz>
To: linux-kernel@vger.kernel.org
Subject: iptables 2.6.38, can kernel erroneously bypass PREROUTING ?
Date: Sun, 18 Sep 2011 18:06:13 +0200 [thread overview]
Message-ID: <4E7616F5.7080009@cdi.cz> (raw)
Hello,
we have problem with high-bw router (1gbit, conntrack, nat, htb qos)
where after some time (weeks) DNAT stops working.
I tried to include "-t raw -A PREROUTING -i eth0" an it got ZERO hits
while -i eth1 has many.
Thus DNAT (in -t nat) doesn't work but interestingly conntrack (and thus
SNAT records) is ok - packets from eth0 sems to be routed.
Only they "somehow" skip all PREROUTING chains.. But from sources
I can find no way how only eth0 pkts could skip PREROUTING but still
be routed and contracked ... Anyone has a clue ?
A didn't more investigation as I had to reboot it - it always helps.
thanks, Martin
next reply other threads:[~2011-09-18 16:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-18 16:06 Martin Devera [this message]
2011-09-19 1:26 ` iptables 2.6.38, can kernel erroneously bypass PREROUTING ? Henrique de Moraes Holschuh
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