From: Born Without <blackhole@airpost.net>
To: "Steve (Telsat Broadband)" <steve@telsatbb.vu>
Cc: netfilter@vger.kernel.org
Subject: Re: FW: Packets missing the NAT table
Date: Sun, 06 Jan 2013 18:08:23 +0100 [thread overview]
Message-ID: <50E9AF87.7070403@airpost.net> (raw)
In-Reply-To: <00a901cdec28$006d1c10$01475430$@telsatbb.vu>
On 06.01.2013 17:08, Steve (Telsat Broadband) wrote:
> Hi All,
>
> I’m just trying to debug an issue on our network and I’ve noticed that some
> packets are being missed from some rules in the NAT table.
>
> Do all packets go through the NAT table or is there some exclusion? I’m
> seeing the packet hitting the mangle table as well as the filter table, but
> not the NAT?
What I've read in the past, the nat table is only consulted at
connection initiation for conntrack state NEW packets.
If conntrack qualifies a packet as INVALID this won't get natted and
sent out as is (if not dropped from another rule).
Try to catch the invalid packets with:
-m conntrack --ctstate INVALID
and see if these are the suspected ones.
prev parent reply other threads:[~2013-01-06 17:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-06 16:08 FW: Packets missing the NAT table Steve (Telsat Broadband)
2013-01-06 16:54 ` Jan Engelhardt
2013-01-06 16:58 ` Steve (Telsat Broadband)
2013-01-06 17:08 ` Born Without [this message]
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