A plea to PSI and other clueless DNS Admins

Stanley Liu stanley.liu at tmca.com.au
Mon Oct 11 00:19:58 UTC 1999


I understand underscore in domain names is not RFC compliant.  Is there any
particular reason why it is not allowed?  It is allowed in SRV records etc. as
you stated.  Just curious.

/stanley
stanley.liu at tmca.com.au

Cricket Liu wrote:

> > Oh but wait until people start sticking Microsoft ActiveDirectory servers
> on
> > the Internet.  They are loaded with underscores in AD and Microsoft says
> > that the underscores are RFC compliant.
>
> Actually, they're not yet RFC-compliant, but they are ID (Internet Draft)
> compiant.  Read RFC 2052bis, at
> ftp://ftp.is.co.za/internet-drafts/draft-ietf-dnsind-rfc2052bis-02.txt.  The
> key here is that underscores are only
> forbidden in domain names that are used as host names.  The owner name
> in a SRV record is a service identifier.
>
> > Ofcourse they also say that stub
> > records are NOT RFC compliant, hence they won't include them in thier
> > implementation of DNS.
>
> I believe you mean stub zones, and again, I think they're right.  Stub zones
> have been labelled experimental for as long as I can remember, even
> though they're very useful.  And I've never seen an RFC that formalizes
> their definition or use.
>
> cricket
>
> Acme Byte & Wire
> cricket at acmebw.com
> www.acmebw.com
>
> Attend our next DNS and BIND class!  See
> www.acmebw.com/training.htm for the
> schedule and to register for upcoming
> classes.



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