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Serial to IP Server - RS232 to IP technology

The RS232 communication protocol shows no signs of disappearing in the near future. It is still a very popular method for communication with laboratory instruments, POS equipment, and industrial automation devices. Despite this fact, most modern computers do not come equipped with serial ports. This can pose a problem if you are trying to connect serial ports to TCP/IP network. This issue demands the use of additional hardware or software to enable network connectivity with serial devices.

What is serial to IP technology?

To enable COM port connections to devices located at a distance from your PC, you just need to convert serial signals into IP data packets. The simplest way to do this is by using a dedicated RS232 to IP solutions.

Serial over IP (SOI) is a technology that enables the transmission of data packets from a COM port (virtual or physical) to the network and vice versa, with the ability to remotely configure the port parameters, monitor their state, and manage their signal line. Whether you want to program, reconfigure or monitor remote serial device’s activity, you will be able to connect to it with the help of serial over IP tools.

Specialized Serial to IP Server software

If you ever find yourself in a situation where you need to connect to a remote COM-based device but cannot do this because it’s located at a long distance from you, the following recommendation is just for you.

Serial to IP Server software is designed to redirect RS232 over IP in such a way that a remote serial device appears on your local computer as though it were inserted right into your machine.
Sec logo

Serial to Ethernet Connector

Requirements: Requirements for Windows (32-bit and 64-bit): XP/2003/2008/ Vista/7/8/10, Windows Server 2012/2016. 4.76MB free space. Version 8.0.1173. (24 May, 2021). 4.9 Rank based on 52+ users, Reviews(86)
Category: Serial Port Software
Serial to Ethernet Connector

Whether you work with the POS equipment, serial port lab instruments, industrial control systems, etc. you can enable seamless serial communications between all of your RS232 devices over IP network with the help of dedicated software solution - Serial Server Connector.

You can use the specialized serial to IP server software for:

  • creating multiple virtual serial ports that are recognized by your system as exact copies of real RS232, RS422, and RS485 interfaces.
  • accessing COM ports from a virtual environment (VMware, Virtual Box, Hyper-V, etc.);
  • redirecting incoming and outgoing data from local real or virtual serial ports over UDP/IP;
  • providing RAW data transmission;
  • sharing serial devices over IP network on Windows and Linux machines. ARM-based devices are also supported.

Serial Server software or Serial to Ethernet Connector (SEC) works over any distance, so it doesn’t really matter where a COM port device is located physically. Once you install the app on the server, to which a required device is attached, and client computers, you can connect virtual serial ports over IP and communicate with the device remotely.

Corporate, SDK & Source code
Looking at redistributing our Serial Port Redirection Engine as a part of your product or considering Serial over Ethernet Connector software for an enterprise-wide deployment? We offer flexible and affordable corporate solutions designed to meet your needs.

How to set up a serial to IP connection

Here is a scenario to consider. You have a serially connected barcode scanner that needs to transmit data to an application running on a remotely located, network-attached computer. Serial to Ethernet Connector creates a virtual connection to COM ports over an IP network. Using RS232 to IP technology lets you work with remote serial devices and ports as if they were physically attached to your computer.

This is how to share a COM port device over the IP network with Serial to Ethernet Connector (Serial to IP Server):

  • Download the app and install it on the COM to IP server and all clients that need to get access to a remote serial device.
  • On the server, launch the software, go to the “Server connection” tab and configure all the required parameters. Click “Create a connection”.
  • On a client, start the app and select “Client connection” in the main menu. In the window that will open, you configure the connection settings and hit “Create connection”.

Server — a computer that have a device, which you want to share, physically plugged in.

Client — a remote PC from which you need to connect to this serial device over your IP network.

This is it! Once done, you will get full access to the remote COM port over IP and device inserted into it. The peripheral will appear in the Device Manager on your client computer like it were your local device.

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How to share serial to IP on Linux

When it comes to working with remote serial ports on a Linux machine, you can rely on the native methods available in most modern distributions of Linux.

In order to redirect RS232 to TCP/IP, you can use netcat:

netcat port </dev/ttyS0 >/dev/ttyS0

Note that this method requires you to run a new instance of the app for every new connection.

To have it persist between connections, just create an xinetd service using the configuration below:

service testservice { port = 5900
socket_type = stream
protocol = tcp
wait = yes
user = root
server = /usr/bin/netcat
server_args = "-l 5900 < /dev/ttyS0"

The /dev/ttyS0 may should be changed to the required serial port. If you want to configure the COM port parameters (like baud rate, parity, etc.), use the stty or setserial commands.


The TCP/IP model is the basic communication language or protocol of the Internet created in 1970s by DARPA, an agency of the US Department of Defence (DOD). It developed from ARPANET - the world's first wide area network and a predecessor of Internet. TCP/IP model is also called the Internet model or the DOD model.
This model was successful because it delivered such basic services as file transfer, electronic mail, remote logon - services everyone needs. Several computers in one department can use TCP/IP on a single LAN. The IP component provides routing from the department to the enterprise network, then to regional networks, and then to global Internet.
TCP/IP is a two-layer protocol. The upper layer - Transmission Control Protocol - assembles a message or file into smaller packets transmitted over the Internet and received by a TCP layer that reassembles these packets into their originals. The lower layer - Internet Protocol - manages the address part of each packet and controls that it reaches the correct destination. Every gateway computer on the network checks this address in order to forward the message (file) to its destination. Some packets of the same message are routed differently, but they are reassembled at the destination.
TCP/IP uses client/server communication model. In this model a computer user (client) requests a service (sending a webpage) and is provided with it by another computer (server) on the network.

We all know even higher layer application protocols that use TCP/IP to get to the Internet. They include Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Telnet, and the Simple Mail Transfer Protocol (SMTP). These and other protocols are often packaged with the TCP/IP as a suite.
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Serial to Ethernet Connector
Access remote serial port over IP Network for Windows
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