Re: Additional filtering of responses

[Tony Finch <[e-mail]>]

On Thu, 7 Aug 2008, Paul Vixie wrote:
>
> first, we should not send, or if we receive, we should not cache or forward,
> anything in the additional section that could be found using a new query.
> this rules out all records except those referred to by NS RRs in an authority
> or answer section, whose target names are at-or-below the NS RR owner name.
>
> second, use these "glue" records only when trying to reach these nameservers,
> or when answering questions or sending referrals about these nameservers.  do
> not use them in answer sections, nor as additional data for MX or SRV or any
> other purpose.  if needed for such "other purpose", go fetch them normally.

Also, these glue records (both authority and additional) should be ignored
if they are already in the cache.

Tony.
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f.anthony.n.finch  <[e-mail]>  http://dotat.at/
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MODERATE OR ROUGH. RAIN OR SHOWERS THEN MAINLY FAIR. MODERATE OR GOOD,
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