Configurable client/server ping program

[ovehal]

I administer several firewalls and would like a simple client server program where I could set up the server app to listen on a selected port. And then "ping" it with the client from outside the firewall to check that the firewall is configured ok.

I'm quite sure that such a program exists out there but I'm not using the right search words I guess....

I'm not looking for a advanced network monitoring/analyzing software just a small client server test app.

Ove.

[Nighted]

I use this: Netoscope. Not sure if this is exactly what you want. Should do the trick though.