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Re: [Openvpn-users] Windows client connects only partially


  • Subject: Re: [Openvpn-users] Windows client connects only partially
  • From: Erich Titl <erich.titl@xxxxxxxx>
  • Date: Thu, 07 Sep 2006 13:40:13 +0000


Toni Casueps wrote:
> The router is a Zyxel Prestige P660HW-61. I've been told that it's a good  
> router, and at the server side there is this same router too so I think it 
> manages UDP ok. However at the server side I have the openvpn udp port open, 
> but not at the client side because I can't forward that port to a single 
> computer (several of them need to use the vpn.) Could it be because of this?

It is not the question of opening the port, it is the question if the
router does NAT UDP packets correctly. The router needs to keep track of
outgoing UDP packets and match them to incoming packets.

To check this, you could use TCP, which is less problematic for routers.
I would not recommend it for everyday usage though, look for TCP over
TCP tunnel in the archives.


> (In other office which has a different router, the VPN went up without 
> opening ports, so I guess it's not necessary... i have no idea...)

You could install ethereal on the client and watch the packets as they
come and go on the client. You will quicly see if the packets from the
server show up.

cheers

Erich
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