Open VPN and Firewall Issue

Hi,

I have two untangle servers configured as routers, and in a site to site vpn, but i'm having some trouble allowing only specific traffic, between the sites.
For example I want to allow a specific port to an specific IP, then i want to block all traffic from the remote site. I configured a firewall rule to allow the port to the specified IP, but i'm not able to block all other traffic to all the other servers.

Any ideas, please let me know if you need any additional information