Thanks anav, most informative and I've bookmarked that page.Mkx is in the right track. However be aware that using a drop rule on the input chain has to be done carefully so you dont lock yourself out.
viewtopic.php?t=180838
Yes, the RDP server is behind pfSense. When you say double NATTED, do you mean on the Mikrotik?So your RDP server is behind the pfsense? Are you double NATTED? Sounds like a MTU problem, can you do a MTU test?
I set this up at both ends and still can't get it to work. I could still ping, but basically nothing changed. I have removed the changes to revert back to my original setup.Yes, both ends.
One final question, what do I do with my existing masquerade policy? Do I put your before mine, after mine or simply delete mine?Yes, both ends.