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Re: [IETF] back by popular demand - a DNS calculator

Ray Bellis <Ray.Bellis@nominet.org.uk> Wed, 20 March 2013 10:50 UTC

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From: Ray Bellis <Ray.Bellis@nominet.org.uk>
To: "Carlos M. martinez" <carlosm3011@gmail.com>
Subject: Re: [IETF] back by popular demand - a DNS calculator
Thread-Topic: [IETF] back by popular demand - a DNS calculator
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Date: Wed, 20 Mar 2013 10:50:05 +0000
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On 21 Feb 2013, at 02:46, Carlos M. martinez <carlosm3011@gmail.com<mailto:carlosm3011@gmail.com>> wrote:

Wasn't the 'evil bit' able to hold the value 2 ?

Use all evil bits for IP addresses and we'll soon have no need for IPv6.

Geoff Huston and I wrote a draft to use the evil bit to indicate the presence of IPv4 NATs.  It could be used as a tie-breaker for Happy Eyeballs.  It's expired, though.

<http://tools.ietf.org/html/draft-bellis-behave-natpresent-00>

Ray

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