[Info-vax] problem conncting via ssh to Fedora-linux-server FC22
Dennis Boone
drb at ihatespam.msu.edu
Mon Jun 1 11:40:29 EDT 2015
> I recently upgraded one of my Fedora-linux servers from FC21 to FC22.
> After the upgrade I was not able to connect via ssh from my OpenVMS
> machines to this server (see log for connections to FC22 (failed) and
> FC21 (succeeded) below.) Connection from any of my linux servers is
> still possible.
> It seems that something goes wrong when negotiating the ciphers.
>From the OpenSSH 6.7 release notes:
Changes since OpenSSH 6.6
=========================
Potentially-incompatible changes
* sshd(8): The default set of ciphers and MACs has been altered to
remove unsafe algorithms. In particular, CBC ciphers and arcfour*
are disabled by default.
The full set of algorithms remains available if configured
explicitly via the Ciphers and MACs sshd_config options.
You were previously using a CBC cipher.
Check the man page for sshd_config on the FC system to find the option
needed to put those back into play.
De
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