Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
>
> What I don't get is that since the sshd programs on linux and fbsd are
> essentially the same code, just why, with the same configuration file,
> one works and the other not.

Are you sure that FreeBSD's SSHd is reading the configuration file
that you think it is? Maybe the config file location, set at build
time, moved in the past and you replaced and old copy of the config
file that wasn't being used anymore.

Failing that, I'd try setting both ends (client and server) to
defaults (empty config file) except for the one line enabling X11
forwarding in SSHd, and see if that works.

--
__ __
#_ < |\| |< _#

On 27/03/2023 22:34, Computer Nerd Kev wrote:
> Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
>>
>> What I don't get is that since the sshd programs on linux and fbsd are
>> essentially the same code, just why, with the same configuration file,
>> one works and the other not.
>
> Are you sure that FreeBSD's SSHd is reading the configuration file
> that you think it is? Maybe the config file location, set at build
> time, moved in the past and you replaced and old copy of the config
> file that wasn't being used anymore.
>
> Failing that, I'd try setting both ends (client and server) to
> defaults (empty config file) except for the one line enabling X11
> forwarding in SSHd, and see if that works.
>

Thanks for the comment.

Yes, I'm sure the files are right; nevertheless I've tried a fresh
almost-empty config file:
root@kirk:/etc/ssh # cat sshd_TEST
X11Forwarding yes

And I /still/ get on the client end:

mike@spock ~ $ ssh -X -v -F /dev/null kirk
......
debug1: Requesting X11 forwarding with authentication spoofing.
......
Running /usr/local/bin/xauth remove unix:11.0
/usr/local/bin/xauth add unix:11.0 MIT-MAGIC-COOKIE-1
f6a4308d2f8fd240103a0454872782ec
Erase set to backspace.
On kirk.scotts remote display set to 192.168.0.9:0
(which is wrong)

I've also tried a raspberry OS client in place of mint; same problem
unsurprisingly.

(BTW, I have no personal config files on either client or server; just
the system ones in /etc/ssh)

--
Mike Scott
Harlow, England

On 2023-03-28, Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
> On 27/03/2023 22:34, Computer Nerd Kev wrote:
>> Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
>>>
>>> What I don't get is that since the sshd programs on linux and fbsd are
>>> essentially the same code, just why, with the same configuration file,
>>> one works and the other not.
>>
>> Are you sure that FreeBSD's SSHd is reading the configuration file
>> that you think it is? Maybe the config file location, set at build
>> time, moved in the past and you replaced and old copy of the config
>> file that wasn't being used anymore.
>>
>> Failing that, I'd try setting both ends (client and server) to
>> defaults (empty config file) except for the one line enabling X11
>> forwarding in SSHd, and see if that works.
>>
>
> Thanks for the comment.
>
> Yes, I'm sure the files are right; nevertheless I've tried a fresh
> almost-empty config file:
> root@kirk:/etc/ssh # cat sshd_TEST
> X11Forwarding yes
>
>
> And I /still/ get on the client end:
>
> mike@spock ~ $ ssh -X -v -F /dev/null kirk
> .....
> debug1: Requesting X11 forwarding with authentication spoofing.
> .....

what is outputing this ....

> Running /usr/local/bin/xauth remove unix:11.0
> /usr/local/bin/xauth add unix:11.0 MIT-MAGIC-COOKIE-1
> f6a4308d2f8fd240103a0454872782ec
> Erase set to backspace.
> On kirk.scotts remote display set to 192.168.0.9:0

check out these files on kirk

~/.ssh/rc
/etc/ssh/sshrc

checkout LOGIN PROCESS section in the sshd man page.

On my linux sshd server neither of those files exist, and so sshd itself
calls xauth, and it works. I'm suspicious that a sshrc script is present
and is not correct.

> (which is wrong)
>
>
> I've also tried a raspberry OS client in place of mint; same problem
> unsurprisingly.
>
> (BTW, I have no personal config files on either client or server; just
> the system ones in /etc/ssh)
>
>

On 28/03/2023 11:10, Jim Jackson wrote:
> On 2023-03-28, Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
>> On 27/03/2023 22:34, Computer Nerd Kev wrote:
>>> Mike Scott <usenet.16@scottsonline.org.uk.invalid> wrote:
>>>>
>>>> What I don't get is that since the sshd programs on linux and fbsd are
>>>> essentially the same code, just why, with the same configuration file,
>>>> one works and the other not.
>>>
>>> Are you sure that FreeBSD's SSHd is reading the configuration file
>>> that you think it is? Maybe the config file location, set at build
>>> time, moved in the past and you replaced and old copy of the config
>>> file that wasn't being used anymore.
>>>
>>> Failing that, I'd try setting both ends (client and server) to
>>> defaults (empty config file) except for the one line enabling X11
>>> forwarding in SSHd, and see if that works.
>>>
>>
>> Thanks for the comment.

Thanks to all for comments.

I've resolved the issue.... somewhen in the dim and distant past
something in the system created a .login file for me which checked
whether the login was over ssh and - yes! - set DISPLAY accordingly. Now
fixed.

(In mitigation, I'm absolutely sure it wasn't my doing - it uses csh
constructs that I don't even know, and presumably it was put there by an
early fbsd system. It must date back 20 years or so; that seems to be
the earliest era for files in that directory.)

So thanks and apologies for the red herring.

--
Mike Scott
Harlow, England