Re: sshd

[Russell VT <russellvt@gmail.com>]

Note that port 5972 isn't *really* what you want, as that's arbitrary...
but port 22.

Check the Windows firewall, as was already suggested (highly suspect, if
you just timeout when trying to connect).

If you try rebuilding what you did under Windows, you're likely going to
want to look at *cygserver* and *cygrunsrv*, and NOT directly at sshd. It's
in /usr/sbin, generally.

Something like:

$ cygrunsrv --list
cygsshd

$ cygrunsrv --query cygsshd
Service             : cygsshd
Display name        : CYGWIN cygsshd
Current State       : Stopped
Command             : /usr/sbin/sshd -D


You might also look to the Windows System Utilities / Sysinternals
<https://docs.microsoft.com/en-us/sysinternals/> (optional download), and
the "Process Explorer" for more detailed Windows information at the tips of
your fingers. They update every month or two, and are worth keeping
"reasonably up to date." There's a plethora of Windows troubleshooting
tools, and some fun stuff as-well.

Cheers -
Russell







On Sat, Feb 12, 2022 at 9:30 PM Mark Geisert <mark@maxrnd.com> wrote:

> Ernie Rael wrote:
> > Hi all,
> >
> > I set up cygwin several years ago and have only had one system at home.
> I've
> > recently got a 2nd, linux.
> >
> > I've used ssh locally under cygwin, primarily to get a term for a use
> with admin
> > priv. And I can ssh from cygwin to the linux machine. On cygwin I see
> >
> >     $ ps -ef |grep sshd
> >     cyg_serv     255     254 ?          Feb  1 /usr/sbin/sshd
> >
> > But ssh from linux to cygwin hangs (finally times out). Ping works linux
> --> windows.
> >
> > I must have run ssh-host-config way back when. Can I just run it again?
> >
> > Suggestions for something else to try and/or triage the problem?
>
> You might try the following.  Determine the Windows pid of your sshd
> process, then
> use netstat to see if that process is listening on the sshd port.  Here's
> what a
> successful check looks like:
>
> ~ ps -as|grep sshd
>    42834 ?          Jan 16 /usr/sbin/sshd
>
> ~ ps -lp 42834
>        PID    PPID    PGID     WINPID   TTY         UID    STIME COMMAND
>      42834   42832   42834       5972  ?         197612   Jan 16
> /usr/sbin/sshd
>
> ~ netstat -ao|grep 5972
>    TCP    0.0.0.0:22             zotac:0                LISTENING
>  5972
>    TCP    [::]:22                zotac:0                LISTENING
>  5972
>
> If the two output lines aren't there, I'd suspect a Windows firewall has
> TCP port
> 22 walled off.  ("zotac" is my machine name; you'll see something
> different there.)
> HTH,
>
> ..mark
>
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-- 
Russell M. Van Tassell <russellvt@gmail.com>