Nine self-hosted services, nine login forms, nine passwords in my manager under slightly different names. I put an identity provider in front of all of them on a thin client, and published it to every interface on the box without noticing.
Certbot on a timer, a deploy hook, and a Discord webhook whose only job was to tell me when the other two broke. Caddy does that work itself, so I moved the front door and deleted the rest.
Thirty lines of nginx boilerplate per service, copied nine times, so any improvement meant nine edits. Caddy does it in two, and writing that up is what made me spot a hop left in cleartext.
I put my identity provider on the internet through a tunnel, then went looking for where to put an access policy in front of it. The answer is a far smaller surface than I expected.
Tautulli has its own login and no way to accept an identity from a proxy. I deleted the account and let authentik be the single gate. Whether that is sensible or reckless depends on your network.
Last post I deleted an application login and let the proxy gatekeep. This one keeps its login, and making the proxy a real boundary took a firewall rule and a lesson about who else talks to a service.
Six posts of proxying applications that cannot do SSO. Proxmox speaks OpenID Connect natively, so the right move was to get out of the way, and small disagreements made that harder.