OpenVZ and VPN/TUN/OpenSwan
If you're having issues with your VPN/OpenSwan not working, try ssh as root to the server and do following
cd /lib/modules
ls -la
And if the results of ls -la above is like below
drwxr-xr-x 9 root root 4096 May 21 18:15 2.6.32-431.el6.i686
drwxr-xr-x 7 root root 4096 May 21 11:28 2.6.32-504.el6.i686
Please contact our Support dept to copy 2.6.32-39-pve kernel to your PBX