Citrix NetScaler Platinum Extranet uses receiver login XenDesktop failed

Problem phenomenon:

According to the standard method to configure the integration of Xendsktop and NetScaler and storefront, after the configuration is complete, the intranet is used normally, the Internet uses the browser to access the virtual desktop is normal, using the ipad receiver landed successfully, Receiver logs off the login prompt "Unable to connect to the server" while using Android receiver to log on to the virtual desktop prompt can not connect, using Windows receiver to log on to the virtual desktop to open, but do not see the list of applications

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Cause of the problem:

Through the packet analysis and review the NetScaler Ns.log log, found that the user's request was APPFW a policy block dropped, then view the NetScaler configuration, found this netscaler opened the app Firewall

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Workaround:

Turn off app firewall or turn off check for Virtual Desktop server in app firewall

Citrix NetScaler Platinum Extranet uses receiver login XenDesktop failed