[Citrix Gateway] Can't Launch ICA Desktop/App with Error: 2517

[Citrix Gateway] Can't Launch ICA Desktop/App with Error: 2517

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Article ID: CTX477296

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Updated On:

Description

You may observe ICA launch failures with error: 2517 through NetScaler gateway ICA proxy vServer. The issue happens when EDT(Adaptive transport) is enabled randomly. 

Resolution

The BUG has been fixed in:
  • 13.0 Build 89.7
  • 13.1 Build 37.38

Release Note:
Applications might fail to launch through Citrix Gateway because of port exhaustion in the Citrix Gateway appliance.
[ NSHELP-32418 ]

As a workaround, we can disable EDT. For more information about EDT, please check: Adaptive transport

Problem Cause

This issue is a BUG when NetScaler tries to allocate port of SNIP for UDP session to VDA.