OpenVPN configuration on OpenWrt

openvpn-on-openwrt.sh

cat >> /etc/firewall << END
iptables -t filter -A input_wan -p udp --dport 1194 -j ACCEPT
iptables -I INPUT 1 -i tun+ -j ACCEPT
iptables -I FORWARD 1 -i tun+ -j ACCEPT
iptables -I OUTPUT 1 -o tun+ -j ACCEPT
iptables -I FORWARD 1 -o tun+ -j ACCEPT
END
 
/etc/init.d/firewall restart
 
opkg install openvpn
# I don't wanna convert my OpenVPN config to UCI-like format so I just replace the default init script.
mv /etc/init.d/openvpn /etc/init.d/openvpn.orig
 
cat >/etc/init.d/openvpn < <END
#!/bin/sh /etc/rc.common
 
START=99
 
start() {
    openvpn --daemon --config /etc/openvpn/server.conf
}
 
restart() {
    stop
    sleep 3
    start
}
 
reload() {
    killall -SIGHUP openvpn
}
 
stop() {
    killall openvpn
}
END
 
chmod 755 /etc/init.d/openvpn
/etc/init.d/openvpn start