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 Post subject: vpn l2tp port forwarding
Unread postPosted: Mon Sep 08, 2008 12:24 pm 
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Joined: Mon Sep 08, 2008 12:16 pm
Posts: 5
Hello friends.
I'm trying to pot forwarding l2tp to a microsoft vpn server, but i can't. It dysplays an error messge saying remore computer didn't respond. I have no problems port forwarding PPtp.
I use windows vpn clients. Is it possible to do this? I undestand there is some complications with nat. Can you help me?
Is there any mod (with GUI) with wich we can configure ipcop to work with windows vpn clients (road warrior mode) in l2tp?

Thanks


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Unread postPosted: Wed Sep 10, 2008 2:13 am 
Site Moderator

Joined: Wed Apr 28, 2004 1:27 am
Posts: 6967
Location: Beaumont, TX, USA
Did you take a look at the Unofficial FAQ?

More information = better answers.
What have you tried?
Did you take a look at your firewall logs?


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Unread postPosted: Thu Sep 11, 2008 4:09 pm 
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Joined: Mon Sep 08, 2008 12:16 pm
Posts: 5
Yes, but did't find nothing about nat transversing. Acording to microsoft, the only router/firewall that can be between client and vpn server is a nat -t one.
Ipcop suports nat-t?
thanks


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Unread postPosted: Fri Sep 12, 2008 12:10 am 
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Joined: Wed Apr 28, 2004 1:27 am
Posts: 6967
Location: Beaumont, TX, USA
Try forwarding the following ports:
* To allow Internet Key Exchange (IKE), open UDP 500.
* To allow IPSec Network Address Translation (NAT-T) open UDP 5500.
* To allow L2TP traffic, open UDP 1701.


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Unread postPosted: Fri Sep 12, 2008 6:27 am 
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Joined: Sat Sep 23, 2006 11:23 am
Posts: 2473
Location: LDK | Hessen | Germany
ds531 wrote:
* To allow IPSec Network Address Translation (NAT-T) open UDP 5500.

IIRC that should be udp/4500.

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Unread postPosted: Fri Sep 12, 2008 4:17 pm 
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Joined: Mon Sep 08, 2008 12:16 pm
Posts: 5
Thanks, good people.
I will try and then report the result.


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Unread postPosted: Fri Sep 12, 2008 8:00 pm 
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Joined: Mon Sep 08, 2008 12:16 pm
Posts: 5
Nothing worked. When i plug the vpn server directly to the internet it works fine, but when ipcop is in the midle l2tp/ipsec doesn't work.
I just don't know what to do any more.
Any new ideas?


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Unread postPosted: Sat Sep 13, 2008 2:00 pm 
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Joined: Wed Apr 28, 2004 1:27 am
Posts: 6967
Location: Beaumont, TX, USA
Did you check the firewall logs?


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