OpenVPN policy based routing help

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znegotiator
DD-WRT Novice


Joined: 22 Dec 2010
Posts: 7

PostPosted: Thu Dec 23, 2010 17:46    Post subject: OpenVPN policy based routing help Reply with quote
Hi There,
My setup is as follows:

Buffalo WZR-HP-G300NH
DD-WRT v24-sp2 (08/07/10) std - build 14896

I have OpenVPN client configured and working with Witopia. I added the data in Services, VPN and added the following to the firewall: iptables -A POSTROUTING -t nat -o tun0 -j MASQUERADE

I want to allow certain IPs (192.168.1.105 in my script below) from my LAN to go through the VPN and the rest of the traffic to go through my ISP.

I read through the manuals and the posts and came up with the following startup script:

#!/bin/sh
sleep 120
PPTPSERVER=$(/usr/sbin/nvram get pptpd_client_srvip)
PPTPGWY=$(/usr/sbin/nvram get wan_gateway)
/sbin/route add -host $PPTPSERVER gw $PPTPGWY dev eth0
/sbin/route del default
/sbin/route add default gw $PPTPGWY metric 100
ip rule add from 192.168.1.105 table 200
/sbin/route add default dev tun0 table 200
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE

What am I doing wrong here?

I think I have eth0, tun0, etc totally wrong so please advice as I'm confused.

Thanks!
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Sash
DD-WRT Guru


Joined: 20 Sep 2006
Posts: 17619
Location: Hesse/Germany

PostPosted: Thu Jul 28, 2011 17:14    Post subject: Reply with quote
tun0 is the server not the client in ddwrt
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