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[Solved] I get the following error when i try to connect to my server over HTML5 Portal "Error: Protocol Security Negotiation Failure"

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



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