© 2012 Peter N. M. Hansteen Recipes in our field are all too often offered with little or no commentary to help the user understand the u...
Against ridiculous odds and even after gaining some media focus, the botnet dubbed The Hail Mary Cloud apparently succeeded in staying unde...
© 2024-2026 Peter N. M. Hansteen Despite some persistent rumors, installing OpenBSD is both quick and easy on most not too exotic har...
© 2026 Peter N. M. Hansteen We are now halfway through the nineteenth year of greytrapping, still tracking and collecting from the w...
© 2025 Peter N. M. Hansteen Norway is digital to a fault. That is why attempting to buy the ticket for a bus ride can reveal a casc...
© 2024 Peter N. M. Hansteen (2024-12-06) Beware of robots generating your references. They could very well take it upon themselves to ...
Image credit: the OpenSMTPD project © 2026 Peter N. M. Hansteen The SMTP mail server for the 21st century and onwards is Op...
© 2025 Peter N. M. Hansteen A chance followup to an old geek joke reveals how AI creates myths based on severely limited historical in...
© 2025 Peter N. M. Hansteen With the imaginary friends , also known as spamtraps , now more numerous than the inhabitants of their vir...
The takeaway: don't pretend your appointment book can handle your email. And don't blame the Internet for all the compatibility issues. The ...
When you publicly assert that somebody sent spam, you need to ensure that your data is accurate . Your process needs to be simple and veri...
A condensed summary of the blocklist data generated from traffic hitting bsdly.net and cooperating sites. After my runbsd.info entry (pr...
Anecdotal evidence seems to indicate that Google and possibly other mail service providers are either quite ignorant of history when it com...
A rarely used legacy misfeature of the main Internet email protocol creeps back from irrelevance as a minor annoyance. You should ask your ...
Natalia here speaks to our imaginary friend 185.150.184.92 In which we confront the pundits' assumption that the embarrasment-based extortio...
© 2012 Peter N. M. Hansteen Recipes in our field are all too often offered with little or no commentary to help the user understand the u...
Field notes and occasional musings by Peter on Stuff that happens, from a free software perspective, mainly OpenBSD, FreeBSD.
© 2026 Peter N. M. Hansteen The long wait is over. Fresh copies of The Book of PF, 4th Edition arrived here today. Which m...
© 2005, 2026 Peter N. M. Hansteen Historical note: We implemented the Carrier Pigeon Internet Protocol, RFC1149 , with the f...
© 2025 Peter N. M. Hansteen A software vendor was using SMTP spamware to send license keys customers had paid thousands for. A measured r...
© 2025 Peter N. M. Hansteen How long does data on misbehaving hosts on the Internet stay relevant in an IP Address Reputation context...
© 2025 Peter N. M. Hansteen Long rumored and eagerly anticipated by some, the fourth edition of The Book of PF is now available for p...
© 2026 Peter N. M. Hansteen So it happened again. A major mail provider proved that they do not, in fact, understand how modern emai...