To instruct sshd to listen to port 22 and port 443:

Start ...Run ... c:\cygwin\setup.exe  
add a package "mc: Midnight Commander"
pop open a black g cygwin window

cd   /etc
chmod 777 sshd_config

mc -e  /etc/sshd_config
Add a line:
Port 443

save file using the [F2] function key
quite Midnight Commander using the [F10] function key

chmod 644 sshd_config
net stop sshd
net start sshd

netstat -an | grep LISTEN   you should see this response Local Address 0.0.0.0:443

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