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I'm trying to set up my RPi as Wifi Access Point and to connect as client to a OpenVPN server.

However, as soon I start OpenVPN my devices associated with the RPi WIFI no longer can access the web. I assume the problem lies in the routing stuff, but am not sure.

My configuration...
WLAN0 -> connected to the internet router
WLAN1 -> WIFI Access Point

Any help is appreciated as I'm left helpless. Thanks.

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  • what shows 'route' after ovpn connection is started? – patricks Jul 23 '13 at 14:41
  • Do you want your wifi traffic to also go through this VPN? – Gerben Jul 23 '13 at 16:38
  • Part 1/2: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 10.119.74.165 128.0.0.0 UG 0 0 0 tun0 default timecapsule.loc 0.0.0.0 UG 0 0 0 wlan0 10.119.72.1 10.119.74.165 255.255.255.255 UGH 0 0 0 tun0 10.119.74.165 * 255.255.255.255 UH 0 0 0 tun0 128.0.0.0 10.119.74.165 128.0.0.0 UG 0 0 0 tun0 – Marco Jul 23 '13 at 20:04
  • Part 2/2: 192.168.1.0 * 255.255.255.0 U 0 0 0 wlan0 192.168.2.0 * 255.255.255.0 U 0 0 0 wlan1 205.164.45.3 timecapsule.loc 255.255.255.255 UGH 0 0 0 wlan0 – Marco Jul 23 '13 at 20:04
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    @Gerben Yes I want all traffic to go through this VPN if it's up. However, SSH should not go via VPN – Marco Jul 23 '13 at 20:12
2

I managed to do this with my RPI, although my VPN connection was running over the Ethernet port, rather than over a second wireless interface.

I wrote up the details of how I got it working here: http://alphaloop.blogspot.com/2014/01/raspberry-pi-as-vpn-wireless-access.html

The main thing that tripped me up was that I tried to use my local router's DNS for any connected devices, but I found that when the VPN connection was up, all traffic from the devices got routed over the VPN, which effectively meant that they were trying to look up a local IP address on the Internet.

I got round it by setting up bind9 as a DNS server on the RPI and pointing the connected devices to that. It might be worth seeing if this fixes your problem.

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  • Would you be willing to copy the high points of the article into the answer, to prevent link rot? – Anti-weakpasswords Mar 9 '16 at 2:16

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