Attempting to connect to VMware Horizon View virtual desktop through the security server throws the error: “Unable to connect to desktop: There is no available gateway for the display protocol. Try again, or contact your administrator if this problem persists.”

Problem

You’ve noticed that the following error is thrown when you attempt to connect to a VMware Horizon View virtual desktop through the security server with the VMware Horizon Client:

Unable to connect to desktop: There is no available gateway for the display protocol. Try again, or contact your administrator if this problem persists.

The following information is logged in the events:

Severity: Audit failure

Module: Connection Server

Message: Unable to launch from Pool <desktopPoolName> for user domain\username

More Information: Unable to launch from Pool <desktopPoolName> for user domain\username: No co-management availability for protocol PCoIP

Attempting to use the Blast protocol from the View client will present a black screen:

… then thrown the following error:

The connection to the remote computer ended

Attempting to use the browser to login:

… will briefly present a triangle and exclamation mark for the desktop:

Then display the following error:

An error has occurred: {"code":"ETIMEDOUT","errno":"ETIMEDOUT","syscall":"connect","address":"10.34.30.60","port":22443}

Solution

One of the reasons why these errors would be thrown is if the following ports are not opened between the Security servers to the virtual desktops:

• TCP/UDP 4172
• TCP 22443
• TCP 32111
• UDP 22443
• TCP 9427

Verify the ports above and all other ports identified in the following KB:

VMware View ports and network connectivity requirements (1027217)
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1027217