Archive for the ‘Wireshark’ category
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 […]
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.
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.
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.
Sharkfest 2016 recap
Another Sharkfest has come and gone, and once again it has been a great conference. If you’re into packet analysis, network forensics or network troubleshooting there is no other event that has the same density of information. It’s really a “specialist” conference, in a very open and friendly way, and newcomers are always welcome.
Megalodon challenge solution
During Sharkfest 2015 I put up a challenge that was different from the usual challenges offered. The pcap files are a lot bigger, the task to solve less specific, and the answer not a simple “easy to verify” answer. I promised to put up my solution a few months after posting the challenge to this […]
Sharkfest 2015 recap
“Jasper, do you have a minute?” I think that is the one sentence that I heard most at Sharkfest 2015, which is the annual Wireshark developer and user conference. Which makes it the most interesting place to be for anyone doing network analysis, for business or fun/hobby (yes, those exist). People asking me for a […]
Port Numbers reused
Sharkfest 2015 is coming up fast (22 days, 12 hours to go when typing this), and so I spend the morning hours of my Saturday for preparation of materials for my three talks. Since that also involves adding features and fixing bugs in TraceWrangler (which I also need for the large demo part of my […]
Deep Dive: Frame Timestamps
Last week Uwe, one of the instructors of the Wireshark class I created for FastLane, gave me a call in the evening. He was teaching a 5 day class in Hamburg at the time, and had had a student ask about a peculiar problem with frame/packet timestamps. I remembered that I had read something about […]
Zombie Packet Mayhem!
My previous post was about one of multiple false positives a network analyst needs to keep an eye out for to avoid writing down findings in a report that weren’t really there. So when I looked at my Sharkfest traces to see what other topic I could write this post about I realized that I […]