OpenWrt 3.14.27 and OpenVPN client for CactusVPN

README.md

You can use Ubuntu configuration files from https://www.cactusvpn.com/downloads/ to setup OpenVPN.

How to setup OpenVPN client for CactusVPN:

1. Update configuration files.
2. Start OpenVPN as /etc/init.d/openvpn start or make it start at boot as /etc/init.d/openvpn enable.

You can also start OpenVPN client manually as follows:

$ openvpn --cd /etc/openvpn --config /etc/openvpn/cactusvpn.ovpn

For some reason kmod-tun is not loaded on startup, thus you will have to do this manually before running openvpn:

$ opkg files kmod-tun
/etc/modules.d/30-tun
/lib/modules/3.14.28/tun.ko
$ insmod /lib/modules/3.14.28/tun.ko

or add this to /etc/rc.local.

UPDATE: sometimes you need to route some traffic across VPN:

$ ip route add <source> via <gateway>

dhcp

# /etc/config/dhcp

config dnsmasq
  ...
  option server '8.8.8.8'
  option server '8.8.4.4'

firewall

# /etc/config/firewall

config zone
  option name 'vpn'
  option input 'REJECT'
  option output 'ACCEPT'
  option forward 'REJECT'
  option masq '1'
  option mtu_fix '1'
  option network 'vpn'

config forwarding                               
  option dest 'vpn'                    
  option src 'lan'

network

# /etc/config/network

config interface 'vpn'
  option proto 'none'
  option ifname 'tap0'

openvpn

# /etc/config/openvpn

package openvpn

config openvpn cactusvpn
  option enabled 1
  option config /etc/openvpn/cactusvpn.ovpn

Logs?