Protocol = RDP
UTM = 9.4
Server = 2012 R2
Browser = FF 45.0.1
Any suggestions? Usual RDP connections in local network works perfect!
Edit: Ok, i have found the fault. The RDP Connection on the Server 2012 was wrong configured
I'm sorry.
I have only german versions of my Windows installations but the translation of the option is:
"Allow connections only from computers running Remote Desktop with Network Level Authentication"
Here a screenshot from Internet
https://www.bing.com/images/search?q=remote+desktop+settings+2012&view=detailv2&&id=4A491AE2669C63DC1CE0EABC272C0D0595DAF7D9&selectedIndex=47&ccid=5pyZ0f8l&simid=608022814396777497&thid=OIP.Me69c99d1ff25acc3ef0bfb38bb8d69f3o0&ajaxhist=0
I hope this helps