Sake Blok
Master Troubleshooter at Wireshark Development Team
Haarlem, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolSake Blok is a Master Troubleshooter with 18+ years diagnosing elusive application, network, and performance problems by analyzing inter-system communications and packet traces. He runs SYN-bit, delivers Wireshark/Tshark and protocol trainings, and applies deep traffic inspection to pinpoint exactly where multi-vendor stacks fail the end user. As a long-time core developer and contributor to the Wireshark project, he has improved TCP/IP dissectors and hardened the tool against crashes, bringing open-source protocol expertise to client investigations. Sake’s background in network engineering, application delivery (F5, Juniper, Nortel) and test-lab development gives him both practical field experience and forensic lab rigor. He likens packet analysis to childhood tinkering—dismantling mechanisms to reveal hidden patterns—and uses that detective mindset to produce clear, vendor-agnostic reports that drive remediation. Based in Haarlem, Netherlands, he’s as comfortable coaching engineers as he is diving into the packet-level details.
18 years of coding experience
15 years of employment as a software developer
Electrical Engineering, Electrical Engineering at University of TwenteHigh School, High School at Sint Nicolaas LyceumBusiness Information Systems, Business Information Systems at University of Amsterdam
Dutch, English, Spanish, German, French
Github Skills (12)
c1710
packet-analysis10
ip10
packet-parsing10
c1110
packet-capture10
wireshark10
network-protocol10
tcp10
wireshark-dissector10
build-system7
git3
Programming languages (6)
Github contributions (5)
wireshark/wireshark
Aug 2007 - Dec 2022
Read-only mirror of Wireshark's Git repository at https://gitlab.com/wireshark/wireshark. ⚠️ GitHub won't let us disable pull requests. ⚠️ THEY WILL BE IGNORED HERE ⚠️ Upload them at GitLab instead.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:191 commits in 15 years 6 months
Contributions summary:Sake primarily contributed to the Wireshark project by implementing and modifying core network protocol dissectors, specifically for TCP and IP protocols. Their work included adding new fields, correcting the dissection of fragmentation offsets for IP, and adjusting the selection criteria for TCP dissectors. Additionally, the user updated the build system and fixed potential segmentation faults. These changes indicate a focus on improving the accuracy and functionality of Wireshark's network analysis capabilities.
tsharkgit-repositorywiresharkpacket-capturegitlab
syn-bit/ry-s-git-tutorial
Sep 2020 - Sep 2020
Contributions:11 commits, 6 pushes, 1 branch in 3 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.