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KRB.EQUIV(5)					     KRB.EQUIV(5)

NAME
       /etc/kerberosIV/krb.equiv - Kerberos host equivalency file

DESCRIPTION
       The krb.equiv file contains a list of  IP  addresses  that
       are to be considered being the same host for Kerberos pur-
       poses.  This allows multi-homed hosts to be  authenticated
       when  the  ticket  address  and	the source address of the
       packet do not match.  Normally authentication  of  a  Ker-
       beros  request  will  fail  when the source address in the
       request packet and the source address in the IP packet  do
       not match.

       The  krb.equiv file contains two or more IP addresses rep-
       resenting all the addresses of one host per line.  If both
       the  ticket  address  and the source address of the packet
       match on one line they are assumed to belong to	the  same
       host

       It   is	 also	possible   to	specify	  one	or   more
       address/masklength pairs and  the  keyword  ``dns''  on	a
       line.   If  the	claimed IP address of a host is in one of
       the supplied  ranges,  the  domain  name	 system	 will  be
       trusted	for a list of IP addresses belonging to the host.

       For example:
		 130.237.223.3	 192.16.126.3	# alv alv1
		 130.237.223.4	 192.16.126.4	# byse byse1
		 130.237.228.152 192.16.126.9 192.35.82.10  # topsy topsy1 topsy2
		 10.1.1.0/24 DNS		    # Trust the DNS for CS subnet

       The krb.equiv file is necessary on the Kerberos server and
       any  host that provides a service that is authenticated by
       Kerberos.

SEE ALSO
       krb.conf(5), krb.realms(5)

MIT Project Athena     Kerberos Version 4.0			1

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