ietf-asrg
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Re: [Asrg] draft-irtf-asrg-bcp-blacklists-00

2004-05-05 01:26:34
Bill Cole <grsa(_at_)billmail(_dot_)scconsult(_dot_)com> wrote:

Set 1:

dnsbl          604800  IN      NS      .

Set 2:

dnsbl          604800  IN      NS      deadend
deadend                604800  IN      A       .

Set 3:

dnsbl          604800  IN      NS      deadend
deadend                604800  IN      A       127.255.255.255


The three options break down pretty easily. #1 is simplest but I'm 
not sure that it is technically proper. #2 is probably technically 
proper, but the '.' RHS may be confusing for some people (or even 
resolvers) who see it. #3 seems to me the wisest choice, because it 
does not depend on a resolver understanding the '.' RHS and is likely 
to look clearly abnormal to any human likely to examine query 
results.

#2 is a syntax error. The IP address on the RHS of an A record is not
a domain so it must have four numerical parts separated by dots. Nothing
else will do.

Tony.
-- 
f.a.n.finch  <dot(_at_)dotat(_dot_)at>  http://dotat.at/
LANDS END TO ST DAVIDS HEAD INCLUDING THE BRISTOL CHANNEL: NORTHWEST 6 OR 7,
DECREASING 5 IN THE EAST. SHOWERS. GOOD. MODERATE OR ROUGH, OCCASIONALLY VERY
ROUGH AT FIRST IN THE WEST, BECOMING SLIGHT IN THE EAST.

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