in reply to How to connect to unix machine from Windows and execute command
AFAIK you will need to either find a suitable "server" software package to install on each Windows host, or write your own. Keep in mind that if you want to use anything like this in a production environment you will need a firm understanding of the security challenges involved. How will you handle authorization and authentication in a way that does not expose sensitive information?
Edit: As was pointed out, I read the question a liiittle too fast. :o)
Ye Olde rsh and telnet are to be used only where security issues can be completely ignored. SSH is much better but still only as secure as the weakest endpoint; if someone finds the password or keys they will have the same access as you do.