https://meta.discourse.org/t/discouse-with-nginx-reverse-proxy-cannot-log-in/205216/5
Discouse with NginX reverse proxy - Cannot log in - #5 by Moin - Self-hosting - Discourse Meta
Jan 23, 2026 - When running an NGINX reverse proxy in front of Discourse you cannot log into the site. After submitting your credentials you are taken back to the index page...