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From: Filippo Zeus <filippozeus@gmail.com>
To: netfilter@vger.kernel.org
Subject: Re: iptables ip_conntrack_ftp + proftpd TLS: PORT command not understood
Date: Mon, 26 May 2008 22:00:55 +0200	[thread overview]
Message-ID: <483B16F7.2010205@gmail.com> (raw)
In-Reply-To: <483B11DF.3050904@bofhland.org>

thanks for your help at first !

yes. and i've tested tons of clients (ftp-ssl, filezilla, hated M$-IE).
unfortunatly tcpdump has confirmed my prefeeling.
Also, reading at proftpd log i can see that encrypted channel is 
switched off after PASS command
and stay on only for the data channel.

I'm not shure, cause i'm not a developer, but i think that ftp_conntrak 
module open a port *ONLY* if
it read first the USER command, then the PASS command, then PASV/PORT 
commands
not simply if a (cleartext) PORT command came from the ftp client.


> Did you verify, by using for example tcpdump, that th client is 
> actually using
> CCC, sending commands in clear text?
>

  reply	other threads:[~2008-05-26 20:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-26 19:24 iptables ip_conntrack_ftp + proftpd TLS: PORT command not understood Filippo Zeus
2008-05-26 19:39 ` whiplash
2008-05-26 20:00   ` Filippo Zeus [this message]
2008-05-26 20:41     ` Patrick McHardy
2008-05-27  1:14       ` Filippo Zeus
2008-05-27  7:39         ` Patrick McHardy
2008-05-27  7:46           ` Jan Engelhardt
2008-05-27  7:49         ` whiplash
2008-05-26 22:05     ` Jan Engelhardt
2008-05-26 22:32       ` Jan Engelhardt
2008-05-26 22:32       ` whiplash
2008-05-27  1:30         ` Filippo Zeus
     [not found] <483B04A8.9000405@gmail.com>
2008-05-26 18:51 ` Filippo Zeus
2008-05-26 19:07   ` whiplash
2008-05-26 19:28   ` Jan Engelhardt

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