Mysterious DNS Problem

[Benjamin John]

Very true, its is stupid when they do that. what is someone going to do with
"real" information ? it only helps to solve problems if you pass out real
information.

Mark is very correct.

Mark_Andrews at isc.org wrote:

> > Well, at least it is mysterious to a rookie like me.
> >
> > I have registered 3 DNS servers with the internic. However, some ISPs have
> > the third DNS addresses in their cache, which point to a mirror site. I
> > waited until the cache was cleared (TTL value expired), and when I queried
> > the ISPs name server, the #3 DNS value was there again.
> >
> > Why does it not cache DNS1 or DNS2? Even though I know they were not down?
> >
> > For example the A record for WWW.MYDOMAIN.COM is 255.255.255.1 on DNS1 and
> > DNS2. The A record for WWW.MYDOMAIN.COM for DNS3 is 255.255.255.2.
> >
> > If you were to use home.net's DNS server, you will be sent to 255.255.255.2.
> > Why doesnt it cache the first value?
>
>         mydomain.com has 4 dns servers not 3.  The nameservers
>         names are ns1.mydomain.com, ns2.mydomain.com, ns3.mydomain.com
>         and ns4.mydomain.com.  The IP address for www.mydomain.com
>         is 209.153.199.62 from all of these servers.
>
>         Why does every rookie expect to get an answer when they hide
>         the domain names / IP addresses involved.  You have a problem,
>         do you hide symtoms when you go to your doctor or to the mechanic
>         to fix your car.  How do you expect us to help you unless we
>         can actually identify the problem.
>
>         Mark
> >
> > Thanks,
> >
> > Mo
> >
> >
> >
> >
> >
> --
> Mark Andrews, Internet Software Consortium
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org