Need simple iptable firewall for openvz node with 3 vps

Hi,

I share my dedi with 2 of my friends thru openvz vps(total 3 openvz vps on the dedi). All the vps are running fine and no issues..

Currently, I dont have a firewall on hostnode. Ssh port is changed and accessed with ssh keys thru putty.

1. 
   

   Do I need a firewall on the host node?

   
   


2. 
   

   Is there any simple to use iptable firewall rules which can be used directly without any(or with little) modifications?

   
   

Please guide me in the right direction. Btw, I dont want to use any control panels(not even free ones) as I dont sell vps to public.

Thanks for your time.

http://ift.tt/1dvHQ0Z