[1639] in Kerberos
Re: krb4 multihome fix?
daemon@ATHENA.MIT.EDU (Hilary Jones)
Thu Nov 14 17:18:49 1991
Date: Thu, 14 Nov 91 13:40:27 -0800
From: hilary@snll-arpagw.llnl.gov (Hilary Jones)
To: exuksm@exu.ericsson.se
Cc: hilary@snll-arpagw.MIT.EDU, kerberos@Athena.MIT.EDU
I have modified Kerberos to solve the multi-homed host problem for a MIPS
machine. I don't see why the same fix wouldn't apply to Sun's and other
platforms. Very briefly, I have modified rd_safe.c, rd_req.c, and rd_priv.c
to call a new routine called chkaddrs. The new routine compares two
IP addresses and concludes whether they are on the same host or not.
The routine makes the decision by looking in /etc/hosts for entries having
a common host name or alias. For example, if these two entries are in the
file:
1.2.3.4 myhost-fddi myhost-k
5.6.7.8 myhost-enet myhost-k
then addresses 1.2.3.4 and 5.6.7.8 are assumed to be on the same host.
It does not present any problems to have two IP addresses labeled with
the same name. I use the hyphen-k convention to indicate that this is
the "Kerberos" name. I would be willing to share the code for chkaddrs with
anyone who wants it.
I understand that K5 solves the multi-homed host problem. Does anyone
out there know how it knows which addresses belong to the same host?
Hilary
