A new internal/clientip says who sent a request and how: the connection's address, scheme and Host, or through a configured proxy what it forwarded. The base URL in pages and setup scripts, isHTTPS for cookies, and the per-address limits of auth and the sign-in forms use it. /setup scripts are no-store. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>