Serial over network - COM port device sharing guide

Electronic devices such as barcode scanners, surveillance cameras and various lab instruments typically use RS232 serial cable connection to interact with a computer. Most computers are equipped with at least one RS232 serial port, and getting a serial adapter for it is never a problem.

RS232 serial communication protocol has a reputation of being flexible and it is well established. With the large number of affordable hardware and software solutions that have been developed for it, RS232 protocol is here to stay, and will most probably remain the most popular interface for industrial electronic equipment for quite some time.


Serial over network sharing options

Serial port communication typically requires a hard-wired, point-to-point cable connection, and it is limited by the length of the cable, i.e. it can only run as far as your cable allows you to. If you want to connect multiple serial devices to one computer, you will need a separate cable and available RS232 serial port to communicate to each of them. Apart from cable clutter, it will be almost impossible to make a device to talk to more than one PC.

Luckily there are serial over network hardware and software that enables you access numerous serial device over any distance. Let us see how it works.

Serial over network – software solution


Windows, macOS, Linux, Android
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To share a serial port over Ethernet on Windows we suggest to use a dedicated software like FlexiHub.

Follow the steps below to share COM port via network with FlexiHub:

  • Register a FlexiHub account here.
  • Start a free trial by selecting a required number of connections and acquiring a trial subscription.
  • Serial over Network
  • Download and install FlexiHub both on the local and remote computers.
  • Launch the app and log in with your email and password.
  • On the remote computer find a required device and click "Connect".
  • Serial port devices over Network

This will connect your serial device to another machine over network, and you will be able to access, browse and manage it as if it were connected to your computer. Free version of FlexiHub allows only to invite other users to access your local devices.

If you would like to share serial port devices over network on Linux, Serial to Ethernet Connector would be a worthy choice.

Serial to Ethernet Connector is a professional solution which allows you to share any number of serial ports over network, either physical or virtual. The workstation a shared device is plugged into serves as a server. Other computers connect to it as clients and gain access to the remote serial device.

Hardware for serial over network sharing

When it comes to serial over network hardware solutions we hear various terms such as Terminal Servers, Serial Servers, Device Servers and Console Servers. You might be wondering what the difference is, and which one you should choose.

First thing we need to tell you: there is no difference. These are just marketing terms given basically to the same thing, i.e. products whose functionality is really similar. Over years as market developed, several companies invented various terms to differentiate themselves from competitors. Let us try to figure it what exactly each one of them means.

Serial device server

Serial device server is the newest marketing term. Generally speaking it is the same a Terminal Server or Console Server with 1 to 4 serial ports. What matters here is the number of serial ports, as the way a Device Server functions is pretty similar to a Terminal Server. It may or may not have security features of a Console Server.

COM port console

Console Servers are marketed as products that provide very secure remote access to Unix Servers, Linux Servers, Windows Servers and any device on the network with a console port. They are usually used to allow network operations center (NOC) employees to safely share serial ports over network and access remote data and IT assets from anywhere in the world. Equipment can be remotely controlled, monitored, diagnosed over LAN or Internet, it is said that all transmitted data is encrypted.

Serial Terminal Server

Terminal Servers (also known as Serial Servers) enable connecting devices with an RS232, RS422 or RS485 serial interface to network. These could be very simple devices that do not provide security such as data encryption or user authentication. They are to be used for accessing network server apps, where data safety is not of a primary concern.


Requirements: Windows XP/2003/2008/Vista/7/8/10/Server 2012
Size: 6.98MB
Version: 4.0.12598 ()
User rating: (4.8 based on 78+ users )