Is there anyway to specify which encryption algorithms x2go allows or

tries to use?

  I have a problem where I've got the latest and greatest installed,

Ubuntu 15.10, latest client, etc. I have customers with old Ubuntu like 12.04LTS, and they can't connect with their old x2go clients because it can't establish a compatible set of encryption.

  I'd like them of course to upgrade their OS and software and they do

understand the reason old algorithms have been blacklisted is that they are insecure, but they are resistant to doing so for a variety of reasons, hardware that doesn't work well or at all with modern releases, legacy software they want to keep running, etc.

  So I'm looking for a fix that will allow them to connect with their 

antique software.

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