It Worked Before: How an OS Upgrade Broke My Rust Sockets
- February 23, 2026
- 6 min read
- Operating systems , Rust programming , Debugging and troubleshooting
I didn’t change a single line of code. I just upgraded my OS, and suddenly my Rust tool stopped working. The error was blunt: Error: Address …
Beyond 127.0.0.1: You Own 16 Million Loopback Addresses
- December 29, 2025
- 5 min read
- Operating systems
Many developers use localhost and 127.0.0.1 interchangeably, assuming loopback is limited to a single address. However, the IPv4 specification …
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