Wildcard syntax

[Edward Lewis]

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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Edward Lewis                                                +1-571-434-5468
NeuStar

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