Com Port Sniffer For Windows

Active2 months ago
  1. Aug 29, 2019  RS232 sniffer for Windows - SerialMon; Technet Portmon; 1. Serial Monitor by Eltima Software. First on our list is Serial Port Monitor - a high-quality COM port sniffer product that can log, display and help you analyze RS232/422/485 port activity in the system. Getting all the data from this useful app allows for quality application.
  2. Aug 19, 2019  1. Serial Port Sniffer by Eltima. Can you imagine an ideal serial port sniffer software? Probably you would expect it to be a simple yet functional solution able to easily read, record and display data transmitted through any real or virtual serial port available in your Windows system.
  3. It works under Windows XP (but not later) and has a much nicer GUI than earlier versions. It produces huge dump files, but everything is there. However, my device is in fact a USB serial device, so I turned to Portmon which can sniff serial port traffic without the USB overhead.

Dec 09, 2013  Freeware RS232 port sniffer/monitor software Hi All I wonder if anyone knows of one of these? I'm looking for a Windows app which will monitor 'live' traffic from an RS232 port and display it. Jan 12, 2012  Portmon for Windows v3.03.; 3 minutes to read; In this article. By Mark Russinovich. Published: January 12, 2012. Download Portmon (226 KB) Run now from Sysinternals Live. Portmon is a utility that monitors and displays all serial and parallel port activity on a system. It has advanced filtering and search capabilities. Free software serial port monitor, Com Rs232 sniffer with communication packet data analyzer. This monitoring utility can spy, capture, view, analyze, test com ports activity performing com port connection and traffic analysis with data acquisition and control.

From time to time, I need to dump USB traffic under Windows, mostly to support hardware under Linux, so my primary goal is to produce dump files for protocol analysis.

For USB traffic, it seems that SniffUsb is the clear winner... It works under Windows XP (but not later) and has a much nicer GUI than earlier versions. It produces huge dump files, but everything is there.

However, my device is in fact a USB serial device, so I turned to Portmon which can sniff serial port traffic without the USB overhead.

Samuel Liew
47.7k37 gold badges121 silver badges180 bronze badges
dpavlindpavlin
8472 gold badges7 silver badges17 bronze badges

6 Answers

Personally, I'd use QEMU or KVM and instrument their USB passthrough code, and then use libusb to prototype the replacement driver in user space (this latter bit I've done before; writing USB device drivers in Python is fun!).

Peter Mortensen
14.5k19 gold badges89 silver badges118 bronze badges
Charles DuffyCharles Duffy
194k29 gold badges224 silver badges281 bronze badges
  1. Since people don't seem to realize it, Wireshark does monitor USB traffic and has a parser for it; but the catch is it only works under Linux. Wireshark on Windows will not do this.

  2. It may be possible to plug the USB device you want to monitor, along with a Linux machine (with Wireshark running) and your Windows machine and just use the USB device under Windows.

  3. Problem with the above? I don't know how the Linux machine or the Windows machine will detect each other.

Peter Mortensen
14.5k19 gold badges89 silver badges118 bronze badges
jamkomojamkomo

After five years waiting, now it's possible to sniff usb packets on windows

See http://desowin.org/usbpcap/tour.html for a quick tour. It works pretty well

albfanalbfan
9,1771 gold badge42 silver badges70 bronze badges

USBSnoop works too - and is free.

Or, you could buy a USB to Ethernet converter and use whatever network sniffer you prefer to see the data.

Maxime
5,9302 gold badges40 silver badges48 bronze badges
gbjbaanb

Serial Port Analyzer

Serialgbjbaanb
46.5k10 gold badges92 silver badges139 bronze badges

Busdog, an open source project hosted on github, has worked well for me. It has a driver it installs to allow it to monitor USB communications. The config window allows you to reinstall or remove the device at any time.

You can select the USB device you want from an enumerated list. A nice feature is to have it automatically trace a new device that is plugged in:

Data communications to and from an SWR analyzer I was reverse engineering were captured flawlessly:

Com Port Sniffer For Windows 10

Kurt FitznerKurt Fitzner

Microsoft Message Analyzer can capture USB traffic as well, if download Device and Log File parser from MS: link

RenatRenat

Com Port Sniffer For Windows

3,7461 gold badge11 silver badges23 bronze badges

protected by CommunityJul 6 '14 at 17:09

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged windowsusbsniffingusbserial or ask your own question.