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Message-ID:	<a6282714-ab39-9f64-a099-e2d7d3d1bb28@raelity.com>
Date:	Sun, 13 Feb 2022 04:38:32 -0800
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Subject:	Re: sshd
To:	cygwin AT cygwin DOT com
References:	<8207721e-0b0d-2314-6038-c430e1758e53 AT raelity DOT com>
	<a267fb96-4f61-65d0-846a-9f55acd59ecb AT maxrnd DOT com>
From:	Ernie Rael <err AT raelity DOT com>
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On 2/12/22 9:29 PM, Mark Geisert 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
>
Thanks Mark,

Doesn't seem to be a firewall issue. NetStat took about 90 seconds.

$ ps -lp 255
       PID    PPID    PGID     WINPID   TTY         UID    STIME COMMAND
       255     254     255       4176  ?           1006   Feb  1 
/usr/sbin/sshd

$ netstat -ao | grep 4176
   TCP    0.0.0.0:22             spirit:0 LISTENING       4176
   TCP    [::]:22                spirit:0 LISTENING       4176


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