sshd

Sun Feb 13 05:29:39 GMT 2022

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