Re: AMMRL: X11 and XQuartz

From: Ryan McKay <rmckay_at_ualberta.ca>
Date: Thu, 14 Jan 2016 14:58:14 -0700

Hi Donald,

I haven’t had to make any local mac changes to get SSH connections to work (i.e. ssh_config and sshd_config don’t need changing).

I do though use ssh -Y option however.

-Y Enables trusted X11 forwarding. Trusted X11 forwardings are not subjected to the X11 SECURITY
             extension controls.

Also I sometimes need the -X connection (enables X11 forwarding)….but this might be only for system that don’t have it explicitly on in the sshd_config file (see below).


For the host RHEL the only thing turned on is the X11Forwarding yes
option.


If you make changes I can’t remember if you have to restart the daemon for the changes to come into effect….. othewise you make changes and nothing happens until reboot…..but it’s been a while since I dealt with that.


Of course this assumes that tcp wrappers allow you to connect, and that the other access control methods allow.


Try ssh -v -v -v hostname and you will see absolutely everything going on. Should help if you’re being blocked.


Best wishes,
Ryan


-----------------------------------------------------------------------------------
Ryan T. McKay, Ph.D.
NMR Laboratory Supervisor
Room E3-17A Email: ryan.mckay_at_ualberta.ca <mailto:ryan_at_nanuc.ca>
Department of Chemistry Phone: (780) 492-9950
University of Alberta Fax: (780) 492-8231
Edmonton, Alberta Cell: (780) 920-8871
Canada T6G 2G2

                        http://www.chemistry.ualberta.ca

> On Jan 14, 2016, at 8:42 AM, Donald Linn <linn_at_ipfw.edu> wrote:
>
> Hi,
>
> I was wondering if anyone has instructions to get XQuartz on an 10.10.x Mac to remotely connect via X-windows to a RHL workstation.
>
> I think the ssh/ssh_config needs to be edited to enable forwarding. Are there any other things folks have been doing to get it to work well? I see Bill Stevens has suggestions back in 2003 on editing hosts.deny and host.allow.
>
> THANKS!
>
> Donald Linn
> Professor of Chemistry
> Indiana U Purdue U Fort Wayne
> 2101 Coliseum Blvd. E.
> Fort Wayne, IN 46815
> Ph 260-481-6813
> http://users.ipfw.edu/linn <http://users.ipfw.edu/linn>
Received on Thu Jan 14 2016 - 11:58:04 MST

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