We are having an issue with RDP sessions.
We recently moved the traffic from a L3 switch to our Palo NGFW and since then Occasionally, RDP sessions freezes for only a few seconds and than continue regularly.
We tried app-override to see if it app-id related, but that didn't solve the issue.
We also tried to change registry values according to this article https://live.paloaltonetworks.com/t5/general-topics/rdp-freeze-fix-globalprotect/td-p/335816 but still not solved.
I would say that it happens on a specific segment. It seem to be working well on other segments (Through the FW).
Does anyone have any suggestions?
Thanks for the help.
At the end we opened a case with TAC and they found the problem and the issue was solved.
We had application override that changed the ms-rdp app to rtcp app.
With rtcp app the ttl was 180 s while with the ms-rdp it was much higher and that was the reason the session was freezed (apparently it happened every time the system was idle which explains the ttl difference).
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