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Sftp/ssh to upgraded Solaris 11.3 system gives error: Disconnecting: Protocol error: no matching DH grp found (Doc ID 2254081.1)

Last updated on OCTOBER 10, 2019

Applies to:

Solaris Operating System - Version 11.3 and later
Information in this document applies to any platform.


 When a SSH client tries to sftp/ssh to a server which was upgraded to Solaris 11.3 , it fails with the above error.

Running sshd debug shows error as below:

     WARNING: no suitable primes in /etc/ssh/primes
     Disconnecting: Protocol error: no matching DH grp found

That is the error the client sees in initial logs of their application which does sftp/ssh.


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