[rescue] SunOS 4.1.3 X-Windows client to modern Linux System, How?

[John-Paul Stewart]

On 2021-04-20 10:33 a.m., Stephen Conley wrote:
> 
> Do you have openSSH server on the Sun machine?  A cursory search suggests
> there's some version of ssh for that era of sun.  If you do, you can make
> sure X11Forwarding is set to 'yes' in the server SSH config, then SSH to it
> thusly:
> 
> ssh -Y user at sun
> 
> ... and just see if firing up an xterm brings it up :)  If you do it this
> way, no env variables to fuss with, no configuration to deal with either,
> it just magically works.

There's one more caveat to SSH:  modern SSH implementations on Linux
disable older (less secure) ciphers and key exchange algorithms by
default.  Unfortunately, the SSH implementations on some older OSes only
support those older algorithms with no support for the newer, preferred
ones.  So it might be necessary to edit /etc/ssh_config on the Linux box
to re-enable some to ensure there is a subset that is supported by both
sides of the connection.  (It can be configured either globally or
per-host.)