I've got a site-to-site VPN running on a pair of Cisco 5510 firewalls. One end is with me at my primary site and the other several miles away at a datacenter. I'd like to find out which ports are open across the VPN and which are not prior to attempting some installs at the datacenter. Is there an easy way to tell using the ASDM interface? I would also need to know how to open specific ports if I find that they are closed. Thanks in advance for any help!