COM Port Redirector
Redirect data from one serial port to another over Network

COM Port Redirector (Serial to Ethernet Connector) is a software tool that enables you to redirect up to 500 serial port devices over network (Internet or LAN). A single COM port can be accessed by multiple computers in the network, no matter where the port is actually located. With Serial Port Redirector by Eltima there is no problem of working with remote serial devices - be it a modem or any other kind of equipment that uses serial ports for communicating with a PC. Remote and virtual serial ports and devices will be treated by your apps as if they were plugged directly into your machine.

Also available on Linux OS and Windows Mobile

Looking for COM Port Redirector for a different OS?
Let us know if you would like to use it on Mac, Android, or iOS.

OEM For Developers

Sign up for the API evaluation program and integrate it into your product on Windows or Linux.

With COM Port Redirector you can

  • Redirect serial ports over TCP/IP network (Server)

    Server listens for incoming connections from clients and redirects local COM ports – either real or virtual – over Ethernet. Any application that can initialize outgoing connection to TCP/IP server can be a client. A single COM port can be redirected to multiple clients at the same time, and each of them can transmit data to their local serial port, while COM Port Redirector will gather all the data on the server.
  • Connect to serial ports remotely (Client)

    Once a client connection is created, data transmitted by a local serial port is redirected to the remote server over TCP/IP protocol. You need to specify the IP address (or the network name) of a remote server and TCP port to connect to, it is not required to install COM Port Redirector on the remote server. Once your machine and a remote server are connected, your local serial port will receive all the data sent from the remote end.
  • Utilize UDP for data transfer

    Serial port data can be redirected over UDP/IP transport protocol and broadcast over a local network. Comport redirector installation is not required at the remote end. You can choose either RAW data transmission algorithm or Telnet (RFC 2217) as a protocol for transmitting the data.
  • COM Port Redirector for Linux OS

    COM Port Redirector (Serial to Ethernet Connector) is a cross-platform solution, it now has a command-line version for Linux OS. You can designate a Linux machine as a server and Windows machine as a client, or the other way around. Serial to Ethernet Connector for Linux supports data transmission over UDP.

    Download COM Port Redirector for Linux OS now!


    Linux version for ARM-based devices is available. Now you can share serial ports on ARM devices or connect to remote devices. Note: you need D-Bus to be installed on your device to use this version.

    Request an evaluation copy of this version

Corporate offers

Whether you're looking at redistributing our COM Port Redirector technology as a part of your product or considering COM Port Redirector software for an enterprise-wide deployment, we offer flexible and affordable corporate solutions designed to meet your needs.

OEM License

OEM License permits you to embed COM Port Redirector into your own software or hardware products.

OEM license grants you the right for unlimited redistribution of COM Port Redirector as an integral part of your software. OEM license is royalty-free one-time purchase.

Eltima Software is able to create a custom version of COM Port Redirector specifically for your needs. Email us for details.
  • Purchasing the OEM license you get

  • Supported IDEs

Unlimited Site License

This type of license is optimal for you, if you have representation offices in different parts of the country, or even in different parts of the world! So, you will need only one Advanced COM Port Redirector license to install it on an unlimited number of computers at any company location worldwide.

Source Code License

Ordering Source Code license for COM Port Redirector you receive all extensively commented programming source code (GUI sources are not included). In addition, we provide technical and information lifetime support by email, IMs and phone, and high-end consulting services. Our leading developers will help you implement Source codes and understand the advanced part of the product.

If you are interested in obtaining more information about Advanced COM Port Redirector licensing, please contact us and we will provide you with all detailed information.

COM Port Redirector full features list

No limitation on the quantity of virtual serial ports or connections created (except your system resources)
Manage port signal lines states in connections
Verify connection's integrity by using "send command to keep connection alive" feature
Set pauses after which all received data is sent to remote end when using UDP as underlayer protocol
Share your serial ports and devices with others over TCP/IP network
Both TCP/IP and UDP/IP protocols are supported
Easily connect to remote computer using TCP/IP Telnet protocol, with the RFC 2217 Telnet extensions for COM Port Control
Share an unlimited number of serial ports simultaneously for remote connections
Serial port names are not restricted to COMxx only and may have virtually any name
High speed data exchange from/to virtual serial port (up to 256 Kbits)

What customers say

  • It is just what we need! COM Port Redirector is bounding our hardware together. Now, we don’t have to pay the extra cost for maintenance and upgrading of our virtual COM drivers. It is the perfect solution for us!
    Xuehui Li, Product manager

Let's get started

COM Port Redirector for Windows
Demo version limitations
• 14-day trial period
System Requirements
Windows 2000, Windows (32-bit and 64-bit): XP/2003/2008/ Vista/7/8/10, Windows Server 2012
Latest Update
Version 7.0.609 (25th May, 2016) Release notes
  • COM Port Redirector For Linux

    Requirements: Kubuntu 9.10 "Karmic Koala", openSUSE 11.2, 7.63MB free space, Version 5.0.180.1 (30th Mar, 2010)