freebsd-ports/security/krb5-16/files

The MIT KRB5 port provides its own login program at
${PREFIX}/sbin/login.krb5.  However, login.krb5 does not make use of
the FreeBSD login.conf and login.access files that provide a means of
setting up and controlling sessions under FreeBSD.  To overcome this,
the MIT KRB5 port uses the FreeBSD /usr/bin/login program to provide
interactive login password authentication instead of the login.krb5
program provided by MIT KRB5.  The FreeBSD /usr/bin/login program does
not have support for Kerberos V password authentication,
e.g. authentication at the console.  The pam_krb5 port must be used to
provide Kerberos V password authentication.

For more information about pam_krb5, please see pam(8) and pam_krb5(8).

If you wish to use login.krb5 that is provided by the MIT KRB5 port,
the arguments "-L ${PREFIX}/sbin/login.krb5" must be
specified as arguments to klogind and KRB5 telnetd, e.g.

klogin	stream	tcp	nowait	root	${PREFIX}/sbin/klogind	klogind -k -c -L ${PREFIX}/sbin/login.krb5
eklogin	stream	tcp	nowait	root	${PREFIX}/sbin/klogind	klogind -k -c -e -L ${PREFIX}/sbin/login.krb5
telnet	stream	tcp	nowait	root	${PREFIX}/sbin/telnetd	telnetd -a none -L ${PREFIX}/sbin/login.krb5

Additionally, if you wish to use the MIT KRB5 provided login.krb5 instead
of the FreeBSD provided /usr/bin/login for local tty logins,
"lo=${PREFIX}/sbin/login.krb5" must be specified in /etc/gettytab, e.g.,

default:\
	:cb:ce:ck:lc:fd#1000:im=\r\n%s/%m (%h) (%t)\r\n\r\n:sp#1200:\
	:if=/etc/issue:\
	:lo=${PREFIX}/sbin/login.krb5:

It is recommended that the FreeBSD /usr/bin/login be used with the
pam_krb5 port instead of the MIT KRB5 provided login.krb5.