netdev - [BUG bisected] 2.6.30.4: NET: active FTP doesn't work

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Date:	Wed, 26 Aug 2009 10:33:59 +0200
From:	Vitezslav Samel <vitezslav@...el.cz>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	Krzysztof Piotr Oledzki <ole@....pl>,
	Greg Kroah-Hartman <gregkh@...e.de>, netdev@...r.kernel.org
Subject: [BUG bisected] 2.6.30.4: NET: active FTP doesn't work

	Hi!

  When testing 2.6.30.4+ kernel, I discovered active ftp does not work
anymore (2.6.30.3 is OK).

               LAN              internet
   machine1  -------  router1   -------   machine2

 Active ftp from machine1 to machine2 connects, transfers some files and
then hangs. Passive ftp works OK. The faulty box (router1)
is router/firewall and is doing NAT.

  I bisected it down to commit 7500f93f415a2fc07e0031d99fa3964bf8981cfc
in linux-2.6.30.y tree ("netfilter: tcp conntrack: fix unacknowledged
data detection with NAT").

  Could you, please, take look at it?

  I'm open to do any tests.

	Thanks,

		Vita Samel
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