Archive for the ‘Wireshark’ category

  1. SMB System Error 384

    This blog post highlights a very specific detail of Microsoft’s implementation of SMB. It might help those, who try to get rid of SMB version 1 and support staff dealing with inaccessible file shares.

  2. Wireshark GeoIP resolution setup V2.0

    I already wrote a blog post about setting up GeoIP resolution for Wireshark in 2013. Now, almost exactly five years later I had to decide if I replace that one with an updated version, or to write a second, updated post instead. I choose the second option.

  3. System Error 58 – Wireshark to the rescue

    The other day I was called to investigate a problem where a user could no longer mount a share. The client was running Windows 7. The user got the somewhat obscure message “System error 58 occurred”.

  4. Sharkfest 2017 US Recap – 10 years of Sharkfest!

    Time always flies at Sharkfest, the annual Wireshark conference, and the 2017 edition – being the 10th Sharkfest in the US – has been no exception. On Friday Sake and me talked about how fast the 3 day conference had felt and we both agreed that “hm, it seems just to have started moments ago […]

  5. The Network Capture Playbook Part 3 – Network cards

    One of the most common answers that come to my mind when being asked questions during or after a talk at a conference is the famous phrase “it depends…”. This may sound unsatisfactory at first, but the problem with a lot of questions regarding network analysis (and packet capture) is that there are always so […]

  6. The Network Capture Playbook Part 2 – Speed, Duplex and Drops

    In part one of the playbook series we took a look at general Ethernet setups and capture situations, so in this post (as in all others following this one) I’ll assume you’re familiar with the topics previously discussed. This time, let’s check out how speed and duplex can become quite important, and what “drops” are […]

  7. Trace File Case Files: SMB2 Performance

    We had an interesting question regarding SMB2 performance on the Wireshark Q&A forum recently. Upon request the person asking the question was able to add a couple of trace files (=”capture” files).  The question and a link to the traces can be found here: https://ask.wireshark.org/questions/55972/slow-writes-even-slower-reads-spanning-wan-to-netapp Since the question nicely fits into the scope my talk […]

  8. Sharkfest Europe 2016 Retrospective

    Finally, the annual Wireshark developer and user conference happened in Europe for the first time in October 2016 at the Hotel Papendal in Arnhem, the Netherlands. It was something many people kept asking for, and with a lot of work and effort, Janice and her team made it happen.

  9. My packet analysis toolset

    As any analyst (regardless of the topic being networks, IT security, forensics etc.) will tell you, it’s almost always a combination of tools that is used to get the results. And since I thought it might be useful, here’s my list of what I primarily use when analyzing packets.

  10. How to Use Wireshark to Steal Passwords

    Wireshark is a great tool to capture network packets, and we all know that people use the network to login to websites like Facebook, Twitter or Amazon. So there must be passwords or other authorization data being transported in those packets, and here’s how to get them.