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Re: [Openvpn-users] TCP works UDP fails


  • Subject: Re: [Openvpn-users] TCP works UDP fails
  • From: Francois Wautier <vpn@xxxxxxxxxxxxx>
  • Date: Wed, 6 Jul 2005 14:27:12 +0700
  • Html: text/html

Wait a tick... I have exactly the same problem.

I have a Cisco router and things used to work with an older version of OpenVPN 
(1.6).

Since I moved to v 2,  UDP doesn't work. TCP works like a charm.

Looking at it, it seems that the server side is not responding, although it 
says it is.

In my case, the Cisco router is doing DNAT for my server. It just looks as if 
NAT had stopped working for UDP packets. 

My 2 cents,
	François


> On Tuesday 05 July 2005 22:01, col_mil@xxxxxxxxxx wrote:
> > Have been stumped by this for months.
> >
> > Both server + client running debian sarge + openvpn 2.0-3.
> >
> > server receives client data via wireless access point on
> > eth1, (client is wireless)
>
> What is the manufacturer and model of access point? I had openvpn UDP
> problems with my D-Link DI-614+. The openvpn peer was on the Ethernet
> switch, not wireless, but I still suspect the router.
>
> Changing the router to DMZ mode (passing everything through to the
> openvpn peer) got things working again.
>
> I'm going to switch to a Linksys WAP and see if the openvpn UDP is
> NAT'ed properly. It always worked behind a Linux NAT firewall.

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