Re: Wildcard syntax - ReadList.com

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Wildcard syntax
\ andy thomas (21 Feb 2008)
. \ Stephane Bortzmeyer (21 Feb 2008)
. \ Mark Andrews (21 Feb 2008)
. \ Edward Lewis (21 Feb 2008)

Subject:	Re: Wildcard syntax
Group:	Bind-users
From:	Edward Lewis
Date:	21 Feb 2008

At 11:17 +0000 2/20/08, andy thomas wrote:

> ww* IN A 1D <IP address>
>
>What is the correct syntax for a ww*
>wildcard. or is this just not possible? There are a few hosts that would
>fit the ww* wildcard (ww2, etc) which we could put in as explicit A
>records instead.

That isn't a wildcard in the "defined sense" of "wildcard" per IETF
documents. But what you want to do isn't impossible - although BIND
can't do pattern matching in that way. (I don't know of any
implementation that does feature that form of answer synthesis, but
some implementers say they want to offer it.)

The closest you can come to what you intend with BIND is via BIND's $GENERATE.

# $GENERATE 0-9 ww$ A 127.0.0.1

will cause these records to appear

# ww0.tld. 900 IN A 127.0.0.1
# ww1.tld. 900 IN A 127.0.0.1
# ww2.tld. 900 IN A 127.0.0.1
# ww3.tld. 900 IN A 127.0.0.1
# ww4.tld. 900 IN A 127.0.0.1
# ww5.tld. 900 IN A 127.0.0.1
# ww6.tld. 900 IN A 127.0.0.1
# ww7.tld. 900 IN A 127.0.0.1
# ww8.tld. 900 IN A 127.0.0.1
# ww9.tld. 900 IN A 127.0.0.1

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