TBF putting a reverse proxy that does authn and rejects requests that do not authn correctly in front of everything (except for the login pages) is nearly as go

TBF putting a reverse proxy that does authn and rejects requests that do not authn correctly in front of everything (except for the login pages) is nearly as good: the exposed area is then login page, reverse proxy, and the authn login in the reverse proxy. That might be vastly simpler to implement.