Hi All,
Have a setup where originally a 14.1 untangle (site B) and newer Cisco ASA (site A) had an IPSec tunnel connecting the two locations. Traffic from B to A was generally unrestricted but from A to B heavily restricted via Network->Filter Rules on Untangle B. RDP (remote desktop) traffic from B to A was a common use of the tunnel and had no problems.
Recently switched out the ASA at A for another Untangle (14.1) and recreated an IPSec tunnel between them. IKE2, tunnel, always connected, everything else default. Left Filter rules on Untangle B. Tunnel comes up and stays up, traffic generally moves as expected across the tunnel. However, now RDP from B to A generally hangs up at some point after the initial login -- often at establishing connection quality. This seems to be an issue at a higher OSI layer since if 3389 is blocked or closed, you usually don't even get the RDP login prompt. I get the prompt, and if I use intentionally wrong creds, it immediately kicks back as such.
Any thoughts? Unexpected to have smooth sailing with different IPSec vendors but rough seas with two of the same brand and revision.