NOTE: Windows 10 ≥ 1809 has OpenSSH built-in. Cygwin isn’t necessary for Windows SSH servers any more.
The robust OpenSSH server on Cygwin allows SSHing into a Windows PC for secure port forwarding Windows RDP. Use Public Key Authentication – it’s far stronger than any human usable keyboard password.
From Windows Command Prompt:
setup-x86_64 -P openssh
Cygwin SSH server setup: start Cygwin64 using “Run as Administrator” and type
- Privilege separation: yes
- strict modes: yes
- sshd as service: yes
- value of CYGWIN for daemon: (just press Enter key, don’t type anything)
- use a different name: no
The Cygwin SSH server starts itself on reboot of Windows, but if you need to start it manually (e.g. for the first time upon installing)
cygrunsrv -S sshd
- login to your Windows Cygwin SSH server from another PC.
- Under services.msc you should see the Status “started” for service “CYGWIN sshd”, and under the General tab the “path to executable” should be something like
Cygwin SSH server config is in
/etc/sshd_config. To make changes take effect, type
cygrunsrv -E sshd cygrunsrv -S sshd
Remove Cygwin SSH server
Disable Cygwin Windows SSH server with Cygwin “Run As Administrator”:
cygrunsrv -E sshd cygrunsrv -R sshd
Reboot and verify that you cannot connect to your former SSH server.
CYGWIN sshd should not be in services.msc anymore.
If you get
system error 1069 has occurred. The service did not start due to a logon failure
check the password on your “privileged server” cyg_server – maybe you typed it wrong.