From: Gao feng <gaofeng@cn.fujitsu.com>
To: netfilter-devel@vger.kernel.org
Subject: nat drop the icmp redirect packet
Date: Mon, 28 Nov 2011 09:12:43 +0800 [thread overview]
Message-ID: <4ED2E00B.3000006@cn.fujitsu.com> (raw)
Hi
In func nf_nat_icmp_reply_translation,the icmp packet will be droped when the nat is not finished.
pc A(whose gateway is C) send a icmp request to pc B.
When gw C receive this packet,it may return a icmp redirect packet to A.
BUT now,the icmp request packet has not go to POSTROUTING,So the nat is not finished.
Finally,the icmp redirect packet will be droped no matter the conn has nat or not.
of course,the icmp redirect packet will be correct handled when nat is finished.
Can somebody will give me some suggestion,
or should I just add a sysctl to let the user decide drop or receive this icmp redirect packet when nat is not finished?
next reply other threads:[~2011-11-28 1:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-28 1:12 Gao feng [this message]
2011-11-28 1:23 ` nat drop the icmp redirect packet Gao feng
2011-11-30 4:00 ` Gao feng
2011-11-30 18:53 ` Patrick McHardy
2011-12-01 0:59 ` Gao feng
2011-12-01 10:20 ` Patrick McHardy
2011-12-02 5:32 ` Gao feng
2011-12-02 12:58 ` Patrick McHardy
2011-12-05 1:18 ` Gao feng
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