Citrix, NetScaler, XenApp, XenDeskTop

Connection to Desktop Failed with Status (Unknown client error 0)


Symptoms or Error
Users unable to launch the published desktop from the Mozilla Firefox.

Getting error messages :

Error 1

The connection to “PA-Desktop” failed with status (Unknown client error 0)

Error 2

Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp Server. The Citrix SSL server you have selected is not accepting connections.

Solution 1
Download the x64 bit Mozilla Firefox:

Working Firefox version – 53.067 64bit
Non-working Firefox version – 52.0.2 32bit
Solution 2
Recommend to test the workaround provided in private fix LC9388 – Add the following string to the SSL Cipher Suite Order GPO of VDA:



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