Hello, Now that Microsoft has bundled OpenSSH for Windows in update 1803 (see https://blogs.msdn.microsoft.com/commandline/2018/03/07/windows10v1803/), here are some observations and the resulting unfortunate behavior:
- On a clean vanilla 1803 install, even with Windows Subsystem for Linux (WSL) not installed, there exists a folder %SystemRoot%\system32\openssh that has native Windows ssh and sshd executables. - %SystemRoot%\system32\openssh is added to the system PATH. - a (manual start) service "sshd", displayname="OpenSSH SSH Server", imagepath=%SystemRoot%\system32\openssh\sshd.exe, gets created. All of the above have the unfortunate consequence that Cygwin sshd no longer works reliably on a 1803 install. First, the service name "sshd" conflicts. This can be worked around by something like "ssh-host-config -N cygwinsshd". Even then, the Cygwin sshd does not always automatically start upon reboot. The Windows sshd is not configured/running, so there should not be a port conflict. SCM reports timeouts (waiting for cygwinsshd to respond) in the event viewer. A manual "sc start cygwinsshd" works, but again, upon the next reboot, the problem is back. There are other permutations depending on the sequence of install. If I were to upgrade a Windows 10 1709 node with a working Cygwin sshd, it seems that the 1803 update detects an existing sshd registry key (which really is Cygwin), does not clobber the registry keys, nor does it install sshd.exe under %SystemRoot%\system32\openssh (though ssh.exe and family get installed). Even on this node, the Cygwin sshd shows the same issue of not autostarting reliably upon reboots. I am not sure what Cygwin can do... but reporting this issue to see if Cygwin sshd can be fixed to autostart reliably upon reboots. As a minimum, the default service name in ssh-host-config should be changed to not collide with Windows "sshd". Thanks. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
