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MAC with viewer does not connect on certain WIFIs

Razvan POP



I have a major problem with Macbook Air 2020 laptops on Catalina 10.15.6 , with Citrix viewer

The viewer doesn't want to start at users home place. In the office, over a mobile hotspot  connection or in an internet caffe , no problem. At home the same laptop just dosen't work.


We have the error bellow. 


If we start the connection with the mobile hotspot and switch then to the home wifi, all good.


I don't see what the problem can be.


Any idea how to solve that will be appreciated. 


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we solved that problem. 

1. We added in the ICA config file




I know edtMSS is supposed to be for WINDOWS systems but fro us that make it working.


2. and we executed that in terminal:


defaults write com.citrix.receiver.nomas UDPStackParameters -bool YES

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