-------- Forwarded Message --------
Subject: Re: AMMRL: X11 and XQuartz
Date: Fri, 15 Jan 2016 11:25:37 -0800
From: Alviclér Magalhães <alvicler_at_uol.com.br>
To: Ryan McKay <rmckay_at_ualberta.ca>
Dear Donald and Fellows,
Sometimes the problem was RHEL version of sshd (daemon) the protocols
for crypt change a lot in last few years in OsX 10.10.x Apple was using
"update" protocols and RHEL (5 ad 6 not) this can be a problem
sometimes. I am not sure if is in your case, but use "ssh -vvv
Your_user_at_Your_machine" to see if protocols match.
If is necessary update RHEL sshd(look for openssl+openssh packges - use
yum or dnf for new systens)
Regards
Calvin
On 1/14/16 1:58 PM, Ryan McKay wrote:
> 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 AlbertaFax: /(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 Fri Jan 15 2016 - 09:26:12 MST