The Display protocol for this desktop is currently blocked by a firewall

[Piear]

Does anyone have any insight to the error message "The Display protocol for this desktop is currently blocked by a firewall" via Horizon View?

[ArnoM · Accepted solution]

Have you seen this article, this might be useful.

https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=10272...

[pari2k3]

Set the firewall profile to allow to all the 3 types Public, Private and Domain for VMware Horizon View framework and PCOIP server on Connection Server and give a try.  That would resolve your issue.  Because your machine may be configured to you public or private network and firewall profile might have configured to allow Domain network.

[RickJSalt]

This just started happening on a virtual machine that is dedicated to one user; she's been logging into it for months now with no issues, but today the error about "The Display protocol for this desktop is currently blocked by a firewall." came up.  She also accesses a computer from a floating pool and has no problems with that one.  I've gone into the machine as admin and can see nothing wrong; the only thing I did change was upgrade Symantec Endpoint Protection; we just underwent an upgrade to the server and clients and that machine was missed.  After a reboot, the issue persists.  I'm grasping at straws here because of the spontaneous nature of the error. 

[BenFB]

Does Symantec Endpoint Protection have a firewall or IDS/IPS component that it blocking the communication?