"Citrix gateway plug-in for java is not supported" on all web browsers except IE

"Citrix gateway plug-in for java is not supported" on all web browsers except IE

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Article ID: CTX316442

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Updated On:

Description

After upgrading ADC software to 13.0 7+

The following is the error message users will see on web browsers:

Citrix Gateway Plug-in for Java is not supported. For further help or information, contact your help desk or system administrator."

Resolution

  1. Remove the policy expression that checks for Referer Header
    • Go to the session policy configuration for the Gateway/ User/ Group and modify as follows:
Original expression:        
REQ.HTTP.HEADER User-Agent NOTCONTAINS CitrixReceiver && REQ.HTTP.HEADER Referer EXISTS

New expression:
REQ.HTTP.HEADER User-Agent NOTCONTAINS CitrixReceiver
  1. Continue to use IE11

Problem Cause

This is due to Citrix Gateway instructing browsers not to send Referer as Request Header. 

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