UFW not working on OpenVZ VPS

I'm trying to make ufw work for an Ubuntu 14.04 vps using openvz. All questions about this problem (like this one) lead to the same site. This one:

http://blog.bodhizazen.net/linux/how-to-use-ufw-in-openvz-templates/

But this site is not accessible (at least to me) and archive.org, says you can't see it's history because of robot.txt

I have seen also these pages:

http://blog.kylemaa.com/linux/2013/04/26/ufw-vps/

http://serverfault.com/questions/317414/open-vz-firewall-solutions

I tried these configurations but didn't work. I allways get this kind errors:

iptables-restore: line 4 failed
iptables-restore: line 77 failed

Questions:

• How can I make ufw work on an openvz vps ?
• Anyone know if there's any copy on the info contained in that inacessible site ?
• Any other guides on how to enable ufw on openvz ?

Thanks