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connect to ICA Proxy over DS-Lite

Kristof Felsö

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Hi guys,


connections to a Netscaler Gateway ICA Proxy don't work, if the client side has an internet connection with DS-Lite (IPv4 tunneled over IPv6). Authentication works, the ICA Connection throws an error. DS-Lite is used by some cable providers in Germany (i expect to reduce the usage of IPv4 Adresses on customer side), in this case Vodafone / Kabel Deutschland.

Is there any workaround available, to get the connection running with these conditions?


Netscaler Gateway ICA vServer is published via IPv4 and IPv6 and matching A / AAAA DNS records.


Thanks & nice regards!

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In my case I can workaround disabling EDT/UDP at the client side.


On Windows this reg forces the Workspace App to use TCP which in my case is working for DS-Lite users.


[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions\Lockdown\Network\UDT]



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