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Our company recently applied patches for a Microsoft vulnerability (MS12-020 - Vulnerabilities in Remote Desktop Could Allow Remote Code Execution) which affected RDP to Windows servers.

Since this I've have difficulty with clients connecting to the server. Originally I was unable to connect XP machines but we fixed that following this guide. I'm still unable to connect with a Linux machine.

Does anyone know a workaround?

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up vote 3 down vote accepted

It seems that FreeRDP has support for "Credential Security Support Provider (CredSSP)" which is what you now need in order to access your servers via RDP.

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Thanks so much, this has been driving me crazy. This solved it! – user141322 Jul 26 '12 at 22:20
Also encountering ""Failed to connect, CredSSP required by server." in rdesktop (rdesktop-1.8.3-2.fc23). At Sourceforge, Henrik Andersson says: "Make sure to initialize a kerberos ticket to be able to connect using CredSSP. There are a lot of guides out there how to do configure a linux kerberos client for Windows Active Directory." Well, I didn't find out what that means nor a guide, but installing package freerdp works for me. – David Tonhofer Jan 12 at 12:23
Find the FreeRDP Manual here. Otherworldy Windows command line syntax: xfreerdp /v:$SERV:$PORT /size:1920x1080 /u:$USER /p:$PASS /compression – David Tonhofer Jan 12 at 12:27

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