Copssh 8 syslog daemon writes log messages to  /var/log/messages as default. You may need to introduce a log rotation scheme to keep growth of that file under control.

You can use the recipe below to use our free tool logwot8 for that purpose.

 Activating users/groups can be done in multiple ways:

• Using AllowUsers/AlowGroups directives globally - requires that user does have a Windows profile directory 

• I am fond of fancy and short names :-))

   

  Cygwin + OPENSSH is a qualified guess !!

• Some recommendations (not all of them can be applicable in your case, no sorting by importance):
   

• Sometimes it may be necessary to see directly how the openssh daemon reacts to startup or connection requests, to be able to locate daemon-related problems.