Scalable and secure access with SSH
I thought this was mostly a solved problem? SSSD or FreeIPA and a bunch of LDAP servers. Cached credentials will keep you online in the case of a transient authentication issue.<p>HA LDAP is pretty much a solved problem as well. Say what you want about various Microsoft server products, Active Directory is second to none in this regard, and is a highly flexible and extremely robust service.<p>Am I missing something specific about Facebook that makes this not an option?