Kerberos authenticatino and ldap authorization

[RJ45]

Hello,
I would liek to use FreeBSD as a login ox using krb5 authentication
and ldap authorization.
The KDC kerberos server is another machine as well hte LDAP server,
this freebsd box is a kerberos and ldap client.

Anyone could give me some good hint on hoe to configure hte FreeBSD box in 
this way ?
I tryed to search for infoes but could only get partial informations.

for example I would like to installa MIT krb5 implementation from ports 
instead of using heidmal default this because the kerberos server
on my network is a MIT server and I can't use kadmin on FreeBSD
to administrer the kerberos server remotely using heidmal implementation.
Anyone has experience of MIT krb5 implementation on FreeBSD ?

as well hoe to enable LDAP authorization for logins on FreeBSD ?

thanks

Rick