Ops feedback notes 2014-11-04
Often people wave hands and say their Kerberos installation is "LoA 2". Need cert-based to get higher LoAs. Using cert-based auth for more sensitive stuff. PKINIT for higher LoAs for Kerberos is interesting. Smart Card Windows login to ssh to Unix systems. Hop-by-hop forwarding of agent connection, etc. There are PuTTY patches for GSS-keyex with cascading creds.
Often sites will do customized builds in-house. For testing, some have QA environments that duplicate entire production KDC setup; others incrementally stage software changes via slave KDCs. It's best to allow for the testing-slave approach because full environment duplication is expensive.