We have a site to site IPSEC vpn up and running and communicate to each security appliance, the gateways and VLANs We have connected laptops and other devices and can traverse back and forth. However, Site A has a vcenter server and we are trying to add two hosts on Site B to the site a vcenter. I can ping the hosts from site A, and ping B and vice versa. However, I cannot get access from site A to the ESXi Host on site B. Is there a TCP/UDP necessary to connect to the host?