
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.
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.
I made two NTP servers using Raspberry Pi single-board computers and GPS receivers.
The resulting NTP servers seem to work well.
Second quarter calendar 2025 lottery winnings summary!
$75 dollar expenditure, $8 winnings!
Previous:
My OpenWrt One router had a problem, which looked analogous to a disk failure. It went into a reboot loop.
A couple of years ago, I made an attempt to create a NTP server using a GPS receiver. I failed.
I tried again in 2025, this time I succeeded.
In January 2025, I started monitoring my network with Smokeping.
I had previously noticed increased latency when a Velop router was connected via powerline ethernet. After upgrading it to OpenWrt, I put that particular Velop back on my network via a $20 TP-Link 8 port 1GbE router. I saw a much smaller increase in latency using the router versus a direct cabled connection.
Here’s a 70 year old paper that’s worth a closer look:
Leo A. Goodman (1954) Some Practical Techniques in Serial Number Analysis, Journal of the American Statistical Association, 49:265, 97-112
This is the only instructions/safety info in a package of 3, 5 mW, laser pointers:
I looked around and found some papers related to Ruggles and Brodie’s 1947 Economic Intelligence paper.