RE: [cobalt-users] dns on a raq 550

["Phil Beynon" <Infolink@xxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: cobalt-users-admin@xxxxxxxxxxxxxxx
> [mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Gerald Waugh
> Sent: Thursday, November 14, 2002 7:39 PM
> To: cobalt-users@xxxxxxxxxxxxxxx
> Subject: RE: [cobalt-users] dns on a raq 550
>
>
> On Thu, 14 Nov 2002, wanadoo wrote:
>
> > Well i don't know of it is only for .nl domains, is there a place to do
> > nameservercheck for other tld
> >
> > So you didnt do anything special to set up the dns.
> > Maby this auestion helps,
> > i have 2 nameservers ns1.domain ns2.domain.
> > This server with i am setting op wil use the same domainname
> > ns3. and ns4
>
>
> > Is that the problem, can i mayby only have 2 nameservers o a
> domain, i dont
> > think so but im asking.
>
> No you can have more than two nameserves for a domain, but why do you
> want, need, more than two?
>
>
> You really havent articulated the problem.
> What exactly is hapening?
>
> Gerald

Gerald,
Quite a good reason to have more than two nameservers was as I personally
discovered recently;
We have a fully patched Raq4i running whatever version Bind Sun supply, our
ISP decided to update their version of Bind on the two nameserver
secondaries they supply us to the absolute latest version. The result of
this was to discover an apparently undocumented bug in backward
compatibility between the two versions. This caused all sorts of issues for
us for nearly a week with corrupted zone file transfers rendering the
secondary nameservers utterly useless. When our box was then busy during
peak times it attempted to pass nameserver delegation to what it thought was
a valid secondary things screwed up big time!
Just about all emails were bouncing with a 451 nameserver error, though
nothing really got lost as it arrived 4 or so days later at the main site.
Interestingly though none of the actual sites went down and all were still
100% accessible.

I'm now in the process of adding another few nameservers for all the sites
we host to hopefully get away from this type of situation in the future!

Technically you can have up to 13 nameservers per site.

Regards,

Phil Beynon


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