Per the VMware View Ports and Network Connectivity documentation, Horizon View Security Servers or the exposed load balancer IP address will require the following ports to be open from the front-end firewall:
It is best to just look at the VMware official documentation for the particular version of View you are using. It is certainly true that if you block any of the ports needed for PCoIP (in a firewall or proxy etc.) you will get a black screen. VMware View 4.5 VMware View Installation Guide : Installing View Connection Server : Sizing Windows Server Settings to Support Your Deployment : Ephemeral Ports View Manager uses ephemeral ports to establish TCP connections between View Connection Server and the View desktops that it administers. VMware View 4.5 VMware View Architecture Planning Guide : Planning for Security Features : Understanding VMware View Communications Protocols : Firewall Rules for View Agent The View Agent installation program opens certain TCP ports on the firewall. You can find diagrams showing port and protocol requirements for connectivity between components and servers in your deployment of Horizon Cloud Service with Microsoft Azure. Use this guide alongside the port and protocol list in Ports and Protocols Requirements for a Horizon Cloud Pod at the September 2019 Release's Manifest Level, to identify how your end users will connect, and make sure
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