VPN

1. Install the VPN package, take Ubuntu as an example

   sudo apt-get install vpnc
   

2. Edit /etc/vpnc/default.conf

   IPSec gateway *gateway.to.use*
   IPSec ID *groupname*
   IPSec secret *passwordforgroup*
   Xauth username *myusername*
   Xauth password *mypassword*
   

3. Connect VPN

   sudo vpnc-connect
   

4. Dis-connect VPN

   sudo vpnc-disconnect