Comm Tunnel

Comm Tunnel is a FREE tool to connect two endpoints. It builds a tunnel between two endpoints. The endpoints can be any of serial port, TCP/IP server, TCP/IP client or UDP. The data received on one endpoint will be forward to anther endpoint. It displays data in text, hex and decimal format.

Download Comm Tunnel


Windows XP, Windows Vista, Windows 7

.Net Framework 2.0


Build a tunnel between two endpoints

Support Serial Port, TCP/IP Server, TCP/IP Client and UDP

Displays data in Text, Hex and Decimal format

Enumerate all available serial port on computer

How to Use

  • 1. Download and unzip it.
  • 2. Run CommTunnel.exe.
  • 3. Click “Setting” button to set both Endpoints respectively.
  • 4. Click “Start” button to connect two endpoints. The connection status will be shown in Log Window.  The transferred data will also be shown in Log Window.
  • 5. Click “Stop” button to disconnect two endpoints.
commtunnel   setting


  • Comm Tunnel will save the current status before it close. It will restore the status when it starts.
  • Comm Tunnel can be added to Windows’ start menu. It can run automatically and start connection immediately after user login Windows.
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