Port Listener

Port Listener is a free, lightweight tool designed to listen on specified TCP ports to help you troubleshoot network connectivity issues, detect port activity, and analyze incoming data. New in version 2.00, the tool now supports real-time TCP/IP connection views and can even respond to incoming HTTP requests with HTML responses, which is great for confirming remote availability. Whether you are a developer, system administrator or security analyst, Port Listener is an essential part of your toolbox.