Serial Tunneling
- Introduction
- Configuration
  - Router
  - On Windows
- Test
  - On Linux

Serial Tunneling

Introduction

The NetModule Router serial port server can forward serial lines to virtual COM ports of a PCs. This allows you to remotely access to PLCs and other serial attached devices.

Configuration

Router

Enable device server on serial line on NetModule Router
Configure “TCP raw” as protocol on IP port in Port Settings
Set port number to 2000 (default)
Set serial port settings to your needs

On Windows

Downlad and install the TCP to Serial Port software https://freecomportredirector.com/
Create connection
Connect serial port to remote host (Client)
Serial Port e.g. COM1
Remote IP from the router, e.g. 192.168.1.1
Port number 2000

Another example:

Test

Connect serial line of the computer to the NetModule router serial interface
Configure the serial line of the NetModule Router
Use Putty to connect to the virtual COM10 and test the Serial Port over IP connection
Use Putty to connect to the COM port of the physical serial line of the PC with the same paramters

On Linux

The socat tool can be used to access the serial interface tunnel via the console using TCP.

The first command is for the connection between IP address and ser2net server on the router

USER

~ $ socat PTY,link=/dev/“virtual interface”,echo=0,wait-slave TCP:“IP-adresse”:“port-nummer”,retry=5

In a second console, the virtual interface is then used for the connection to the serial interface.