We have a Cisco secure VPN site to site tunnel between the 2 locations.
Which ports are need to open on tunnel so that users can successfully use OCS over the site to site VPN tunnel.
All the users are havning the main brach AD account.
Using Wireshark captured the packets, found only port TCP 5060, after allowing this port over tunnel I can see the authentication window.
The user authentication fails. Already port 3389, 80, 443 are allowed
The main requirement is to only have the Chat, Group Chat and file transfer. Not require A\V traffic.
OCS is using TCP. no TLS is configured.
Any idea what are all the other ports require to end up with successful authentication.