Jasper

Head of CSIRT @ G Data Advanced Analytics. IR Handling/Network Analyst/DFIR. Creator of TraceWrangler. Wireshark Power User. I read PCAPs. My thoughts are my own.

Jasper boosted:
2025-07-11

Just getting started with Wireshark?

Check out “Packet Capture 101” for a beginner-friendly intro to packet analysis! Taught by @packetjay, this session covers everything you need to know to get up and running with Wireshark.

youtube.com/watch?v=rWHWOat5_X

Want to learn live from experts? Join us at SharkFest'25 EUROPE for hands-on classes, networking, and all things packet analysis.

Don’t miss your chance to level up your network troubleshooting skills—visit sharkfest.wireshark.org for details!

#Wireshark #PacketCapture #sf25eu

Jasper boosted:
2025-07-03

Dive deep into the heart of #TCP with @packetjay at SharkFest'25 Europe!

Join the TCP Analysis Masterclass and learn how to dissect, diagnose, and master complex TCP behaviors from one of the best in the field. Whether you're chasing lost packets or tuning performance, this class is for you.

sharkfest.wireshark.org/sfeu

#SharkFest #sf25eu #TCPAnalysis #Wireshark #NetworkEngineering #PacketAnalysis

Dive deep into the heart of #TCP with Jasper Bongertz at SharkFest'25 Europe!

Join the TCP Analysis Masterclass and learn how to dissect, diagnose, and master complex TCP behaviors from one of the best in the field. Whether you're chasing lost packets or tuning performance, this class is for you.

Picture of Jasper Bongertz and info about his SharkFest'25 EUROPE pre-conference class.
Jasper boosted:
2025-06-18

The packet doctors are in! Sake Blok, Ross Bagurdes, and Chris Greer are analyzing pcaps from attendees that they’ve never seen before.

Jasper boosted:
2025-06-17

A huge thank you to all of the people that helped to make the Wireshark Certfied Analyst certification happen!

Learn more about the WCA certification here: wireshark.org/certifications

#WCA #Wireshark

@packetjay
@geraldcombs

People who helped create the WCA (Wireshark Certified Analyst) certification at SharkFest.
Jasper boosted:
2025-06-16

The final day of SharkFest’25 US pre-conference classes are well underway! @packetjay and Sake Blok are teaching classes about #TCP and #SSL/TLS troubleshooting.

Jasper boosted:
2025-04-24

Just one week left to apply for the SharkFest’25 US Women in Tech Scholarship—the deadline is April 30th!

Two scholarships cover pre-conference classes and full conference registration at SharkFest. The Wireshark Foundation is committed to fostering diversity in network analysis—apply now at the link below!

sharkfest.wireshark.org/sfus/w

#Wireshark #WomenInTech

Just one week left to apply for the SharkFest’25 US Women in Tech Scholarship—the deadline is April 30th!

Two scholarships cover pre-conference classes and full conference registration
SharkFest. The Wireshark Foundation is committed to fostering diversity in network analysis—apply now at the link below!
Jasper boosted:
2025-03-27

​Join us at SharkFest'25 US for the #TCP Analysis Masterclass with network security expert @packetjay on June 16th.

This pre-conference class delves deep into TCP troubleshooting, from basic concepts to complex scenarios involving multi-point captures for packet loss and timing issues. Elevate your network analysis skills and tackle challenging cases with confidence. Reserve your spot now! ​

sharkfest.wireshark.org/sfus

#Wireshark #sf25us #SharkFest #PacketCapture

​Join us at SharkFest'25 US for the TCP Analysis Masterclass with network security expert Jasper Bongertz. This pre-conference class delves deep into TCP troubleshooting, from basic concepts to complex scenarios involving multi-point captures for packet loss and timing issues. Elevate your network analysis skills and tackle challenging cases with confidence. Reserve your spot now! ​
Jasper boosted:
2025-02-13

SharkFest’25 US is the place to learn from the best in network analysis, connect with Wireshark experts, and sharpen your packet analysis skills.

Hear what past attendees & sponsors have said about their experience: youtu.be/s_jQdS9gD-c.

Don’t miss this opportunity to level up your skills and join a community that’s shaping the future of networking. Register before March 1 to receive 10% off & be part of it!

sharkfest.wireshark.org/sfus

#Wireshark #Stratoshark

Jasper boosted:
2025-02-08

SharkFest’25 US is the must-attend event for network, Wireshark & Stratoshark pros!

This year, we’re bringing you a keynote from Vint Cerf, a "Father of the Internet" himself! Dive into hands-on labs, expert-led sessions, and game-changing insights. Spots are filling fast—register now!

Sign up before March 1 for an early bird discount: sharkfest.wireshark.org/sfus

#Wireshark #SharkFest #Stratoshark

Picture of Vint Cerf, one of the fathers of the internet.
Jasper boosted:
2025-02-02

I showed off the original #Wireshark / Ethereal server today at #FOSDEM. Pretty sure it got more applause than I did.

Jasper boosted:
2025-02-02

Thanks to everyone at #FOSDEM who attended today's talk on #Stratoshark! It was a lot of fun!

View of the auditorium from the upper level.

Just released a new version of Tracewrangler at www.tracewrangler.com. Some minor bug fixes, and it can now read & write Linux Cooked Capture v2 headers, so those kind of
files can now be sanitized as well. Not a big thing, but I'm slowly getting into coding again it seems...

A Screenshot of the Tracewrangler application window showing a pcap file loaded with it's meta information in the lower right pane. A "Anonymize Files" task is assigned and pending to run.
Jasper boosted:
2024-12-21

Only the CCC can save Germany

Jasper boosted:
𝙽𝙴𝚃𝚁𝙴𝚂𝙴𝙲netresec@infosec.exchange
2024-10-23

Erik and @jonasl’s Network Fingerprinting talk is now online. It covers #JA4 and #JARM by John Althouse, @lcamtuf’s #p0f and Eric Kollmann’s Satori.
youtube.com/watch?v=1_VbYp4Zyn

Jasper boosted:
2024-09-09

Here's a great video for Wireshark users of all levels from a past conference talking about Network Troubleshooting from Scratch, taught by Jasper Bongertz.

youtu.be/4hMT0kcW39g

For more classes like this in-person in Vienna, join us 4-8 Nov for SharkFest'24 EUROPE!

sharkfest.wireshark.org/sfeu

#Wireshark #NetworkTroubleshooting #troubleshooting

Jasper boosted:
2024-06-10

"During the intrusion, the threat actor deployed a binary named "cslite.exe" on the beachhead host. Upon investigation, we identified this binary as a RAT known as CSharp Streamer, thanks to an excellent write-up by Hendrik Eckardt."

@Lekensteyn I read "wrangler" and was like "oh no, what did I do? Oh, he's probably not talking about Tracewrangler... 😅"

Client Info

Server: https://mastodon.social
Version: 2025.04
Repository: https://github.com/cyevgeniy/lmst