@sindarina@mastodon.lol 🔗 https://mastodon.lol/users/sindarina/statuses/109699105064465900 – Since I just saw yet another developer use ‘1.2.3.4’ in an example configuration, a reminder that you MUST NOT use publicly routable addresses that you do not control in your code. Instead, use one of the available ‘TEST-NET’ IPv4 or IPv6 ranges documented in RFC 6890, such as; 192.0.2.0/24 198.51.100.0/24 203.0.113.0/24 ❌ 1.2.3.4 ✅ 192.0.2.4 Pass it on to all of your fellow developers, documentation writers, and so forth. Full RFC is here; https://datatracker.ietf.org/doc/rfc6890/