Arch Linux

momo.reina

Member

Registered: 2012-02-23

Posts: 66

OpenVPN [CLI] issues, DNS leaks with VPN

I'm having this issue with OpenVPN where the routing table IS updated by the VPN server BUT doesn't route traffic to the new IPs. I'm using NetworkManager and OpenVPN CLI.

OpenVPN CLI

Sat Nov 22 23:48:10 2014 /usr/bin/ip route add 95.211.190.205/32 via 192.168.0.1
Sat Nov 22 23:48:10 2014 /usr/bin/ip route add 0.0.0.0/1 via 10.8.8.105
Sat Nov 22 23:48:10 2014 /usr/bin/ip route add 128.0.0.0/1 via 10.8.8.105
Sat Nov 22 23:48:10 2014 /usr/bin/ip route add 10.8.8.1/32 via 10.8.8.105

Checking routing table

/etc/openvpn » ip route show                                                                                                                                                                                                                    
default via 192.168.0.1 dev wlp3s0  proto static  metric 1024 
10.8.8.1 via 10.8.8.105 dev tun0  proto static  metric 20 
10.8.8.105 dev tun0  proto kernel  scope link  src 10.8.8.106 
95.211.190.205 via 192.168.0.1 dev wlp3s0 
128.0.0.0/1 via 10.8.8.105 dev tun0  proto static  metric 20 
192.168.0.0/24 dev wlp3s0  proto kernel  scope link  src 192.168.0.105 
192.168.0.0/24 dev wlp3s0  proto kernel  scope link  src 192.168.0.105  metric 302 

The new routes have been added but if I go to www.dnsleaktest.com it will show my real IP.

I tried adding this

sudo ip route add default dev tun0 

which I got from here, and it seems to have fixed the problem. www.dnsleaktest.com will now show the VPN server IP, but as the OP from the other post mentioned, I have to do this manually everytime I change server/reboot.

Is there a permanent solution to this?

brebs

Member

Registered: 2007-04-03

Posts: 3,742

Re: OpenVPN [CLI] issues, DNS leaks with VPN

You put:

Sat Nov 22 23:48:10 2014 /usr/bin/ip route add 0.0.0.0/1 via 10.8.8.105

But it's completely missing from your "ip route show" results - why?

momo.reina

Member

Registered: 2012-02-23

Posts: 66

Re: OpenVPN [CLI] issues, DNS leaks with VPN

Hah, I didn't notice that. Not sure why that's missing....

momo.reina

Member

Registered: 2012-02-23

Posts: 66

Re: OpenVPN [CLI] issues, DNS leaks with VPN

I've tried building from source and the problem persists. OpenVPN adds 0.0.0.0/1 but

ip route show

doesn't show it. Traffic seems to continue to be routed to

default via 192.168.0.1 dev wlp3s0  proto static  metric 1024 

instead of the new routes added.