Subject: Re: how do I configure PPP to do this?
To: John F. Woods <>
From: Erik E. Fair <>
List: current-users
Date: 10/23/1997 08:50:18
The problem is that the DNS data is wrong. Every host has exactly one
canonical name, sometimes aliases (unfortunately referred to as CNAMEs),
and sometimes multiple IP addresses. If your PPP link is permanent and the
IP addresses statically allocated (and for routing to work properly, it
pretty much has to be), then your ISP needs to return the name of your host
for an IN-ADDR query (presuming that they are authoritative for the IN-ADDR
of the PPP network). Of course, an "A" record query for your hostname
should return both of its IP addresses also - it is, after all, a
multi-homed host and router.

The only other way this could be made to work is if NetBSD can be
configured to support what cisco calls an "unnumbered" network - a point to
point link between two routers that does not have an IP address of its own,
and each side of the link uses a LAN interface address when it emits
packets. The idea is to have each host appear to be half of a router and
the link between them nonexistant.

	Erik <>