Comm Tunnel is a FREE tool to connect two endpoints for Serial Port, TCP/IP or UDP.

Features:

Build a tunnel between two endpoints
Support Serial Port, TCP/IP Server, TCP/IP Client and UDP
Display data in Text, Hex and Decimal format
Enumerate all available serial port on computer

Requirement:

Windows XP, Windows Vista, Windows 7
.Net Framework 2.0

How to Use

1. Download CommTunnel.zip and unzip it.
2. Run CommTunnel.exe.
3. Click "Setting" button to set both Endpoints respectively. The Endpoint could be a serial port, TCP/IP server, TCP/IP client or UDP.
4. Click "Start" button to connect two Endpoints. The connection status and the transferred data will also be shown in Log Window.
5. Click "Stop" button to disconnect two Endpoints.

Tips:
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 login Windows.