To:
dnsop@cafax.se
From:
"Eric A. Hall" <ehall@ehsco.com>
Date:
Wed, 12 Nov 2003 06:59:02 -0600
Sender:
owner-dnsop@cafax.se
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Subject:
the least-worst default
Of the three classes, the well-known address approach is the only one that can work in all cases. DHCP and RA both have natural uses in specific situations but difficulties in other situations, making them poor choices as the "default". OTOH, the well-known-address approach *can* work for everybody by default, at least if a couple of minor changes are made. In particular, it needs to use a multicast address rather than a unicast address -- servers won't be able to listen on a unicast address that isn't configured in the OS, but they should be able to bind and listen to a standardized multicast address without any problems. And it should probably be restricted to an optype that chooses a server, instead of being used for all queries -- this is particularly important given the potential for spoofed answers if ad-hoc servers are going to be allowed. Those changes can be debated separately, of course. The important thing here is that this is the only approach that has the potential for 100% coverage, and thus the only approach that's suitable as the default. -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/ #---------------------------------------------------------------------- # To unsubscribe, send a message to <dnsop-request@cafax.se>.