internet

GPS PPS Separation

GPS PPS Separation

I set up two Raspberry Pi SBCs with GPS boards as NTP servers earlier this year. I used an oscilloscope to see how far apart the “pulse per second” (PPS) pulses that the GPS boards output.

Goofing on Meta's AI Crawler

Goofing on Meta's AI Crawler

Early in March 2025, I noticed that a web crawler with a user agent string of

meta-externalagent/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/crawler)

was hitting my blog’s machine at an unreasonable rate.

2025-11-29: Hacker News and Slashdot comparison for this post.

PPP Problem

PPP Problem

My house has 2 CenturyLink fiber optic connections to The Internet. On July 5, 2025, the connections didn’t work for 3 periods of time.