DNS servers wont resolve certain DNS names

[Barry Margolin]

In article <bn3n3s$13m$1 at sf1.isc.org>, Mike Hale <mhale at TOUA.net> wrote:
>Thanks for the help so far. I'm still working through this problem
>without much success. The results you got below are typical of what I'm
>getting here except for what I mention below. Just this one site times
>out resolving through our servers. Other sites resolve just fine. I'd
>like to chaulk it up to what Peter Hkanson said about www.hardocp.com
>having errors but others servers seem to be able to resolve it.

What happens when you try to ping or traceroute to ns.itotf.com?

>I do notice one problem that has cropped up. DNS servers are incorrectly
>reporting an old IP address that should no longer be used for our
>primary name server. I checked our registrar a few days ago after
>noticing this but it only accepts FQDN not Ips and it is reporting the
>FQDN as the incorrect IP. So, I changed it to a CNAME for the primary
>name server hoping that the change would have propagated by now, but it

NS records must always point to an A record, not a CNAME.

>doesn't seem to have worked. Our name servers are correctly resolving
>the FQDNs as the correct IPs. Where is our registrar getting the
>information for resolving our primary name server? Is it cached
>somewhere. How could our primary name server still be reporting an old
>ip address? Could this be related in some bizarre way to not being able
>to resolve a name through our servers?

When you changed the IP you forgot to update the registration of the server
host.

   Server Name: NS1.TOUA.NET
   IP Address: 216.64.154.21
   Registrar: NETWORK SOLUTIONS, INC.
   Whois Server: whois.networksolutions.com
   Referral URL: http://www.networksolutions.com

Note that this will have absolutely no impact on your ability to resolve
names in other domains, it only affects people trying to resolve names in
your domain.

-- 
Barry Margolin, barry.margolin at level3.com
Level(3), Woburn, MA
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