Packet-first cybersecurity and network forensics
Inspired by the community that taught me, I share open-source packet tools, practical training, and straight talk about what's on the wire.
Packets don't lie
If one thing has stayed true throughout my career, it's this: packet-level data provides the most granular insight into network communication — whether you're chasing an elusive network problem or reconstructing a security breach.
I'm Walter Hofstetter, a security analyst and packet whisperer based in Zürich. My journey with packets began at Network General Corporation, the makers of the legendary Sniffer Network Analyzer. From there I moved through technical roles at Network Associates, Symantec, and Palo Alto Networks, and today I work as a consultant for Anyweb, a fantastic Swiss company. Whatever role I've held along the way — instructor, consultant, workshop lead, speaker — I've always kept an eye on the packets.
Teaching, tools, and talking shop
Teaching
The Packet Factor
A hands-on two-day training on analyzing network traffic from a security perspective. Beyond Wireshark, we work with open-source tools, look at attacks from the attacker's point of view, and learn to read the traces they leave on the wire. Offered through anyweb-training.ch.
Speaking & consulting
Talks, workshops, community
I regularly give talks and run workshops on packet analysis and security analytics. I'm currently still employed, so my focus is training, tools, and community — consulting is planned once I retire, as volunteer work rather than a business.
Packet Coding
Mostly a hobby
Building tools is more hobby than business for me — always open-source, usually born out of a "wouldn't it be nice if Wireshark could…" moment. See what's on GitHub →