krb4-config | Configuration files for Kerberos Version 4 | Mehr ...
This package provides /etc/krb.conf, /etc/krb.realms, and any other files needed to configure Kerberos Version 4. This package may be used with one of the implementations of Kerberos in Debian including the krb4 compatibility in MIT Kerberos 5, or with a locally built Kerberos. Generally this package will be installed as part of installing some Kerberos implementation.
krb5-config | Configuration files for Kerberos Version 5 | Mehr ...
This package provides /etc/krb5.conf and any other files needed to configure Kerberos Version 5. This package may be used with one of the implementations of Kerberos in Debian, or with a locally built Kerberos. Generally this package will be installed as part of installing some Kerberos implementation.