* Re: sshd service removed by Windows 10 update 1803
[not found] <5b4fd2ad.1c69fb81.3e7e4.c9cdSMTPIN_ADDED_MISSING@mx.google.com>
@ 2018-07-19 15:09 ` madhu gupta
0 siblings, 0 replies; 2+ messages in thread
From: madhu gupta @ 2018-07-19 15:09 UTC (permalink / raw)
To: cygwin
Thanks.
On Thu, Jul 19, 2018 at 5:51 AM, Cliff Geschke <
cliff.geschke@preciseautomation.com> wrote:
> As part of a Windows 10 update 1803 a few days ago, the cygwin sshd
> service was
> removed, keeping my users from accessing my server. I had been
> successfully
> using sshd for several years and it has survived numerous windows updates.
>
> Here is what I have done to fix it:
>
> Disable the following services via W10 computer management.
> OpenSSH Authentication Agent
> SSH Server Broker
> SSH Server Proxy
> SSHdBroker
>
> I'm not sure all those need to be disabled.
>
> Run a bash shell as administrator, and reinstall sshd using cygrunsrv
>
> cygrunsrv --stop sshd
> cygrunsrv --remove sshd
> cygrunsrv --install sshd --path /usr/sbin/sshd.exe --user cyg_server
> cygrunsrv --start sshd
>
> You will get an error from the start command:
> cygrunsrv: Error starting a service: QueryServiceStatus: Win32 error
> 1062:
> The service has not been started.
>
> The task manager shows sshd is indeed running, and remote ssh clients can
> log
> in. So I am ignoring the error.
>
> cygrunsrv -Q sshd shows the service is stopped. And W10 computer
> management
> shows it is stopped. If you try to start it again, it will fail because
> the
> sshd task has a hold on the TCP ports. If you want to stop/restart to edit
> config files, you need to directly kill the sshd task.
>
> After a system restart, W10 starts the correct sshd again.
>
> Simply using "cygrunsrv --install sshd" without --path, installs the MS
> sshd.
> Not what I want.
>
> If you don't specify --user with the --install, W10 will use SYSTEM which
> does
> not have the permissions (SeTcbPrivilege etc) to change to the client
> user. So
> you get seteuid Operation Not Permitted errors when a remote client tries
> and
> fails to login. I discovered this the hard way.
>
> BTW, I didn't want to start over with ssh-host-config because I didn't
> want to
> risk invalidating my encryption keys and confuse my remote clients.
>
> Except for the weirdness where computer management and cygrunsrv -Q show
> the
> service is stopped, everything seems to work okay and my users are happy
> again.
>
> Cliff Geschke
> Precise Automation
>
>
>
> --
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>
>
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^ permalink raw reply [flat|nested] 2+ messages in thread
* sshd service removed by Windows 10 update 1803
@ 2018-07-19 12:39 Cliff Geschke
0 siblings, 0 replies; 2+ messages in thread
From: Cliff Geschke @ 2018-07-19 12:39 UTC (permalink / raw)
To: cygwin
As part of a Windows 10 update 1803 a few days ago, the cygwin sshd service was
removed, keeping my users from accessing my server. I had been successfully
using sshd for several years and it has survived numerous windows updates.
Here is what I have done to fix it:
Disable the following services via W10 computer management.
OpenSSH Authentication Agent
SSH Server Broker
SSH Server Proxy
SSHdBroker
I'm not sure all those need to be disabled.
Run a bash shell as administrator, and reinstall sshd using cygrunsrv
cygrunsrv --stop sshd
cygrunsrv --remove sshd
cygrunsrv --install sshd --path /usr/sbin/sshd.exe --user cyg_server
cygrunsrv --start sshd
You will get an error from the start command:
cygrunsrv: Error starting a service: QueryServiceStatus: Win32 error 1062:
The service has not been started.
The task manager shows sshd is indeed running, and remote ssh clients can log
in. So I am ignoring the error.
cygrunsrv -Q sshd shows the service is stopped. And W10 computer management
shows it is stopped. If you try to start it again, it will fail because the
sshd task has a hold on the TCP ports. If you want to stop/restart to edit
config files, you need to directly kill the sshd task.
After a system restart, W10 starts the correct sshd again.
Simply using "cygrunsrv --install sshd" without --path, installs the MS sshd.
Not what I want.
If you don't specify --user with the --install, W10 will use SYSTEM which does
not have the permissions (SeTcbPrivilege etc) to change to the client user. So
you get seteuid Operation Not Permitted errors when a remote client tries and
fails to login. I discovered this the hard way.
BTW, I didn't want to start over with ssh-host-config because I didn't want to
risk invalidating my encryption keys and confuse my remote clients.
Except for the weirdness where computer management and cygrunsrv -Q show the
service is stopped, everything seems to work okay and my users are happy again.
Cliff Geschke
Precise Automation
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-07-19 15:09 ` sshd service removed by Windows 10 update 1803 madhu gupta
2018-07-19 12:39 Cliff Geschke
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