Network Monitor 3.1 Has Released!

The NM3.1 is now available on featuring wireless sniffing and an easier way to create filters using "Right Click Add To Filter". Here is a list of features that are new to NM3.1.

What's New in Network Monitor 3.1?

  • Wireless (802.11) capturing and monitor mode on Vista – With supported hardware, (Native WIFI), you can now trace wireless management packets. You can scan all channels or a subset of the ones your wireless NIC supports. You can also focus in on one specific channel. We now show the wireless metadata for normal wireless frames. This is really cool for t-shooting wireless problems. See signal strength and transfer speed as you walk around your house!
  • RAS tracing support on Vista – Now you can trace your RAS connections so you can see the traffic inside your VPN tunnel. Previously this was only available with XP.
  • Right click add to filter – Now there's an easier way to discover how to create filters. Right click in the frame details data element or a column field in the frame summary and select add to filter. What could be easier!
  • Microsoft Update enabled – Now you will be prompted when new updates exist. NM3.1 will occasionally check for a new version and notify you when one is available.
  • New look filter toolbar – We've changed the UI related to apply and remove filters. You can now apply a filter without having to UN-apply it first.
  • New reassembly engine – Our reassembly engine has been improved to handle a larger variety of protocol reassembly schemes.
  • New public parsers – These include ip1394, ipcp, ipv6cp, madcap, pppoE, soap, ssdp, winsrpl, as well as improvements in the previously shipped parsers.
  • Numerous Bug Fixes – We've taken your reported problems on the connect site and fixed many of the confirmed bugs.
  • Faster Parser Loading – We've significantly improved the time it takes to load the parsers. Now rebuilding takes a fraction of the time it used to.

How do I get NM3.1?

NM3.1 is currently available on You will need to sign in with your passport account and participate in the Network Monitor 3 project, if you haven't already. Once you do this, you'll have access to the latest download. This will also give you access to our bug filing process and access to our news groups for getting support. We will also release NM3.1 on the Microsoft Download site within the next few weeks.


Comments (10)
  1. Anonymous says:

    Network Monitor vient d’être livré en version 3.1 sur le site comme l’indique

  2. Anonymous says:

    Network Monitor 3.1 can now be downloaded for free at Microsoft Connect. There are a couple of interesting new features. Most important certainly is that one can now capture 802.11a/b/g management and data frames.

    This greatly helps you troubleshoot wi..

  3. Anders Rask says:

    This post was moved from the beta release announcement to here.

    The post above should be read after this one 🙂

    There seems to be an issue witch might be related to network monitor 3.1:

    I myself have experienced System process on my Vista Business suddenly using 99% for hours and hours without anything happening. This behaviour started after i installed NM 3.1.

    When googling the subject (see link below) others reported too that this had happened on their Vista after they installed NM 3.1.

    I have now uninstalled NM 3.1 and so far i havent had Vista going 99 on me yet!

    Is this a known issue? I got a dump file i can send if anyone is interested in debugging if NM causes this.



  4. Anonymous says:

    Network Monitor vient d’être livré en version 3.1 sur le site comme l’indique

  5. Paul E Long says:

    I guess you are asking when will there be support for the Intel 3945 Wireless card?  

    We have been working with Intel to support Native WiFi.  So keep an eye out for an updated driver.


    Network Monitor Team

  6. hubertsvk says:

    when i start capture i got error "Unknown error"

  7. Anonymous says:

    When it has support for intel 3945 ?

  8. Anders Rask says:

    Oh yeah another thing that may or may not be related to the issue: i have had problems with my WiFi NIC after installing NM 3.1 too. It would stop working just showing up as disabled, with nothing happening when i enabled it -it would just stay disabled.

    I saw NM supports WiFi tracking now, so i thought i would mention it.

    WiFi works fine now after i uninstalled NM 3.1

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