Yes, the Book of PF, fourth edition is coming soon

Ed(1) mastery is a must for a real Unix person

A Few of My Favorite Things About the OpenBSD Packet Filter Tools

SPF Protected Spammers in the Public Cloud, Spamware to Spamtraps, SSH Groping

Predicting developments in real world conflict from patterns of failed logins

What every IT person needs to know about OpenBSD

Recent and not so recent changes in OpenBSD

The Sextortion Scams: The Numbers Show We Have A Failure of Education

The Year 2019 in Review: This Was, Once Again, Weirder Than the Last One

OpenBSD and the modern laptop

Forcing the Password Gropers Through a Smaller Hole with OpenBSD's PF Queues

Is SPF Simply Too Hard For Application Developers?

The OpenSSH Bug That Wasn't

Why Not Use Port Knocking? (2012)

Solaris adopting OpenBSD's pf