Author Archive for Jasper

  1. Patch! Patch! Patch!

    Bob Plankers, Technical Marketing Architect for vSphere at VMware, has a very simple but important message for all of us, and it isn’t really limited to VMware itself: “Patch! Patch! Patch! Did I say… patch?”. That was his starting message when I visited VMware during Security Field Day 2, and there was more Bob had […]
  2. Wireless Capture on Windows

    Capturing Wireless on Windows was always problematic, because other than on Linux or Mac it wasn’t possible to activate Monitor mode on the WiFi cards to capture the radio layer. All you could do was capture packets on your WiFi card from the Ethernet layer and up. That’s  unless you spent money on the now […]
  3. Cisco Live – Network Building Blocks for IoT

    Cisco Live happened in Barcelona end of January, and as usual I am a little late with my blog posts about it. Like the last two years I was invited to join the group of technology experts for Tech Field Day Extra, with various presentations covering a number of new and improved Cisco technologies as […]
  4. Sharkfest 2018 EU

    I’m back from Sharkfest EU 2018 and once again it was a great conference. This time, many core developers and instructors brought their families along, so it felt even more like a family gathering than ever before.
  5. Installing Moloch on Debian 9 Stretch

    Moloch is a tool that builds on Elasticsearch to process large numbers of network packets, either from a live network or from imported PCAP files. This is how I installed it on a Debian 9 server.
  6. Attacking Wireshark

    Every once in a while there is some news about Wireshark being vulnerable to being attacked/exploited/pwned, meaning that there is a way to craft frames/packets in a pcap/pcapng file to make Wireshark crash and (if done right) execute malicious code. So let’s take a look at what that means and what can be done about […]
  7. Wireshark Column Setup Deepdive

    Every once in a while I check the blog statistics for the searches that have brought visitors here. Most of them are more or less concealed versions of “how can I grab the password of others/my ex partner/my children/friends”, which comes as no surprise. Today I saw one search expression that I used as inspiration […]
  8. PCAP Split and Merge

    Sometimes it also happens during network troubleshooting engagements, but it is also common for analysis jobs regarding network forensics: dealing with huge number of packets, sometimes millions or more. Two typical situations may have you scratch your head: either you have one huge file containing all packets at once, or you have a ton of […]
  9. 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.
  10. A look at Cisco Tetration

    Once again I was invited to join the group of delegates for Tech Field Day Extra at Cisco Live 2018 in Barcelona, with various presentations covering a number of new and improved Cisco technologies. One of them I had seen already last year at the same event in Berlin, but hadn’t had the time to […]