• Description: When connecting with rdesktop to a windows box, no connection is established, but this error message displayed:
Failed to connect, CredSSP required by Server
  • Solution: There are two possible ways:

  • Downgrade security on Windows server to accept SSL/TLSv2

  • 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.

Since I am too lazy for no. 2, this is how to downgrade a non-existing operating system security:

  1. Open System properties
  2. Chose the tab Remote
  3. Untick the option Allow connections only from computers running Remote Desktop with Network Level Authentication (recommended).
  4. Be happy.