Quoting Jaap Winius <jwinius@umrk.nl>:
Although I know how to configure syncrepl with the "simple" bindmethod,
using a clear-text password exchange and clear-text database
replication, and I know how to setup an provider server with MIT
Kerberos V encryption support, can anyone explain how to configure a
consumer so that syncrepl also uses Kerberos?
Okay, I'll answer this one myself.
Before I begin, let me say that, in this case, Kerberos only offers
encrypted authentication and not data encryption for the OpenLDAP
replication phase; for that it is necessary to set up a Certificate
Authority and use TLS (LDAP over SSL, slapd on port 636).