From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mario Ohnewald <mario.ohnewald@gmx.de>
Subject: Re: ftp contrack
Date: Tue, 25 Jan 2005 11:20:50 +0100
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To: Filip Sneppe <filip.sneppe@gmail.com>
Cc: netfilter@lists.netfilter.org

On Tue, 2005-01-25 at 14:43, Filip Sneppe wrote:
> On Tue, 25 Jan 2005 10:50:26 +0100, Mario Ohnewald
> <mario.ohnewald@gmx.de> wrote:
> > 
> > by the way.
> >  modprobe ip_nat_ftp ports=21,2121
> > didnt work.
> > 
> Did you rmmod the ip_nat_ftp module before reloading it ?


Yes, i did.

The weird thing is that it works ONLY with the first ftp connection.
If i try to upload something a 2nd time, the packges wont get forwarded
anymore. I can see the following packages with tcpdump:
(- 123.123.123.123 is the client
 - 222.222.222.222 is the FW)


15:02:45.999772 IP 123.123.123.123.42823 > 222.222.222.222.2121: SWE
1965111453:1965111453(0) win 5840 <mss 1460,sackOK,timestamp 313275888
0,nop,wscale 0>
15:02:48.990185 IP 123.123.123.123.42823 > 222.222.222.222.2121: SWE
1965111453:1965111453(0) win 5840 <mss 1460,sackOK,timestamp 313276188
0,nop,wscale 0>
15:02:54.990145 IP 123.123.123.123.42823 > 222.222.222.222.2121: SWE
1965111453:1965111453(0) win 5840 <mss 1460,sackOK,timestamp 313276788
0,nop,wscale 0>
15:03:06.990205 IP 123.123.123.123.42823 > 222.222.222.222.2121: SWE
1965111453:1965111453(0) win 5840 <mss 1460,sackOK,timestamp 313277988
0,nop,wscale 0>

as you can see, its not even forwarding.
/proc/sys/net/ipv4/ip_forward is turned on.


Cheers, Mario