Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I need to validate some network connectivity from machine X to a Windows 2003 Server machine. To be able to do so I'm looking for a simple utility that I can run on the Windows 2003 server that will listen on a specified port. It does not have to do anything else. When it listens on the specified port I can do a telnet to that port from machine X and check if all firewalls are open.

The Windows 2003 Server machine is already a production machine so I cannot install all kinds of stuff. At this stage we want to ensure that all network connectivity is in place before we do the installation of the 'real' application that will listen that port (don't want to wast time debugging network connectivity issues when we do the actual deployment of the new application.

The utility should be a simple command line utility that does not require any installation.

What utilities do you recommend?

Thanks, Gero

share|improve this question

Netcat may help. Read about it here.

share|improve this answer
Nope, netcat does not seem to run on Windows (only Unix as far as I can see). Gero – user38009 Mar 18 '10 at 20:53
Under "variants" there was a link right to here. – Bart Silverstrim Mar 19 '10 at 1:15
Wait, how did I get a downvote for suggesting netcat when there's a link to the Windows version right in the @#% link? – Bart Silverstrim Mar 19 '10 at 1:16

Can you just configure an IIS virtual to listen on that required port?

share|improve this answer

windump will help you to shoot this kind of problems.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.