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Old 02-27-2013, 12:56 AM   #1
Registered: Oct 2003
Location: Canada
Distribution: Ubuntu Server LTS 14.04.1
Posts: 553

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Does VPN require a VPN Passthrough Router?

Hey LQ,

This isn't really a Linux specific question but rather a network specific question. I've set up a VPN server behind an ActionTec Router/DSL modem and I can't seem to connect to it from outside the network. I'm forwarding ports 500 tcp/udp and 1723 tcp/udp to the computer running the VPN software (built in VPN connection from Windows XP) and I've even gone as far to set this computer as the DMZ host.

I still cannot connect. From guides I've read on the internet they say you need to enable VPN Passthrough but as far as I can tell that's not even an option in my webgui for my Actiontec router. Does this mean I'm screwed and can't make this work?
Old 02-27-2013, 04:38 AM   #2
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Registered: May 2003
Location: istanbul
Distribution: debian - redhat - others
Posts: 1,188

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What VPN do u have, pptp ??

for pptp, u should forward "GRE protokol" and "tcp protocol port 1723" to your vpn server.
most of dsl routers do not support forwarding GRE protocol.

pptp should work if u set DMZ host in router config.

i do not prefer dsl-routers use directly as gteway (nat, port forward etc.). i place a linux/BSD firewall between LAN and dsl modem and use dsl modem in bridge mode. So i can get public ip on my firewall via pppoe.

Last edited by maxut; 02-27-2013 at 04:40 AM.


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