OpenVPN
Finally, configured OpenVPN well now.
My situation is: 2 computers A & B, A is at the lab and in a subnet, B is at the dormitory. I just want A to use B's connection.
Following OpenVPN's Static Key Mini-HOWTO, I used the following configurations:
Server:
remote server.ip dev tun0 ifconfig 10.8.0.1 10.8.0.2 secret /etc/openvpn/static.key comp-lzo keepalive 10 60 ping-timer-rem persist-tun persist-key
Client:
remote server.ip dev tun0 ifconfig 10.8.0.2 10.8.0.1 secret /etc/openvpn/static.key comp-lzo keepalive 10 60 ping-timer-rem persist-tun persist-key
And then is the routing settings. At server, I must enable ip forwarding as the following script:
#!/bin/sh modprobe iptable_nat iptables -t nat -A POSTROUTING -s 10.8.0.0/16 -d ! 10.8.0.0/16 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward
At client, Add the original route to the server network, and add 10.8.0.1 as the gateway to all other networks:
#!/bin/sh route add -net server.ip netmask 255.255.255.0 gw 192.168.0.251 route del default route add default gw 10.8.0.1
And then I can use OpenVPN!
