From http://aun.uninett.no:8083/cgi-bin/nph-zone-check.pl

seol.net.au zone check result

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Warning: Name server appears to be an alias
The name ns.seol.net.au does not appear to be the "real name" of this host.
This was checked by translating the IP address(es) of this host
(203.220.28.7) which yielded ns1.seol.net.au. Use of such aliases is
strongly discouraged since they might falsely lead you to beleive that you
can move the name service to another IP address without notifying the
administrators of the parent zone.
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Error: No SOA response
The name server ns1.seol.net.au (at IP address 203.220.28.8) failed to
return the SOA record for the zone seol.net.au.
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Warning: No translation for 1.0.0.127.in-addr.arpa
The name server ns.seol.net.au (at IP address 203.220.28.7) does not appear
to be set up to return a PTR for the above name. By convention, all name
servers ought to provide translation for this address, which is commonly
used for addressing "loopback" interfaces, particularly on Unix systems.
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Warning: No translation for 1.0.0.127.in-addr.arpa
The name server ns1.seol.net.au (at IP address 203.220.28.7) does not appear
to be set up to return a PTR for the above name. By convention, all name
servers ought to provide translation for this address, which is commonly
used for addressing "loopback" interfaces, particularly on Unix systems.
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Summary
Errors: 1
Warnings: 3

The multiple address mappings for ns1 is the only real problem I have seen
so far.

Darryl (Dassa) Lynch

|> -----Original Message-----
|> From: Tony Owen [mailto:tony§seol.net.au]
|> Sent: Sunday, November 02, 2003 3:55 PM
|> To: dns§lists.auda.org.au
|> Subject: [DNS] DNS Problem
|>
|> Hi to any Guru's out there,
|>
|> I have had an ongoing problem that effects host lookups from
|> some exernal systems to mail.seol.net.au (and quite possily
|> every thing else we provide DNS for) but the mail is the one
|> that is most noticable.
|>
|> I have rang our registrar, and I'm assured glue etc is all in place.
|>
|> our names servers are listed as ns1.seol.net.au and
|> ns2.seol.net.au, the ttl's are quite low while we have been
|> trying to resolve this problem.
|>
|> I have a friend who sent me the following:
|>
|> <snip>
|> I set up the DNS packet capturing a few days ago, and I've
|> been doing DNS lookups for mail.seol.net.au every minute for
|> the last few days.
|>
|> The lookups fail for the first 7 minutes of every second hour (i.e.
|> when the cached records have expired and the DNS server must
|> do the lookup from scratch).
|> </snip>
|>
|> Any help appreciated,
|>
|> Cheers Tony
|>
|>
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