Mattias open sourced a small Caddy module that caches get_certificate HTTP lookups, avoiding a backend fetch on every TLS handshake. A nice write-up on the problem, the design, and the trade-offs.
PHP
The ghost domain problem in DNS, and what we’re doing about it
A good write-up on the ghost domain problem in DNS: domains removed from a registry can still appear healthy to uptime checkers because recursive resolvers keep stale delegations warm. The Oh Dear team explains the Read more…