DNS and IP Change

Ok.. here's the situation...
I have primary and secondary nameserver with about 20 domains.
Lately my connection was cut off and now im looking for the new provider
but that's not what makes me wonder ;]
When i will change provider - my IP's will change too and i'm concern about
my DNS.
I guess that all i will have to do is change my bind configs (DNS and RevDNS)
and thats it!
All should work ... but am i right ? :]


--
Wojciech -=thezor=- K.
thezorAThostSK

On Fri, 2 Apr 2004 07:10:54 +0000 (UTC), Th3ZoR <(E-Mail Removed)>
wrote:

> When i will change provider - my IP's will change too and i'm concern
> about my DNS.

> I guess that all i will have to do is change my bind configs (DNS and
> RevDNS) and thats it! All should work ... but am i right ? :]

You will also have to notify the registrar where your domain name is
registered so they can update the root name servers with the new IP
address of your DNS.


--
-| Bob Hauck
-| To Whom You Are Speaking
-| http://www.haucks.org/

On 2004-04-02, Bob Hauck <(E-Mail Removed)> wrote:
> On Fri, 2 Apr 2004 07:10:54 +0000 (UTC), Th3ZoR <(E-Mail Removed)>
> wrote:
>
>> When i will change provider - my IP's will change too and i'm concern
>> about my DNS.
>
>> I guess that all i will have to do is change my bind configs (DNS and
>> RevDNS) and thats it! All should work ... but am i right ? :]
>
> You will also have to notify the registrar where your domain name is
> registered so they can update the root name servers with the new IP
> address of your DNS.
>
>

Hmmm... ok.
Let get things more clearly...
I maintain 20 domains, so i must update just first domain (xyz.com) but
not the others, becouse they all point to my server (ns1.xyz.com
and ns2.xyz.com), right?
And yes.. i understand what are you talking about but my primary domain
is also maintain by my nameservers.
I was thinking about that my server points to my root server and updates
info about IPs, so that root server could send info proper info to dns
query.
right ?.. or not ?
I might be wrong in my understaning the subject.. thats why im asking here.

Thanks in advance...


--
On Her Majesty's Secret Service
Wojciech -=thezor=- K.
thezorAThostDOTsk

Th3ZoR wrote:
> I maintain 20 domains, so i must update just first domain (xyz.com)
> but not the others, becouse they all point to my server (ns1.xyz.com
> and ns2.xyz.com), right?

Only if those 20 domains are subdomains of your main domain
(domain1.xyz.com, domain2.xyz.com, ...). Othewise you must update the
information for all the domains separtely.

> I was thinking about that my server points to my root server and
> updates info about IPs, so that root server could send info proper
> info to dns query.

I don't believe you have a _root_ nameserver. The root servers hold the
info of the nameservers of the top level domains
(.com, .org, .net, ...).

--
Markku Kolkka
(E-Mail Removed)

On Fri, 2 Apr 2004 15:20:34 +0000 (UTC), Th3ZoR <(E-Mail Removed)> wrote:
> On 2004-04-02, Bob Hauck <(E-Mail Removed)> wrote:
>> On Fri, 2 Apr 2004 07:10:54 +0000 (UTC), Th3ZoR <(E-Mail Removed)>
>> wrote:
>>
>>> When i will change provider - my IP's will change too and i'm concern
>>> about my DNS.
>>
>>> I guess that all i will have to do is change my bind configs (DNS and
>>> RevDNS) and thats it! All should work ... but am i right ? :]
>>
>> You will also have to notify the registrar where your domain name is
>> registered so they can update the root name servers with the new IP
>> address of your DNS.

> I maintain 20 domains, so i must update just first domain (xyz.com)
> but not the others, becouse they all point to my server (ns1.xyz.com
> and ns2.xyz.com), right?

What does "first domain" mean? The first one you registered? There is
no special significance to that. Unless they are all subdomains of
xyz.com you must update them all. Your registrar may provide a way to
do this more-or-less automatically, but you haven't said who that is.
If you are changing hosting providers, they will normally offer to do it
for you.

The way it works is this. When somebody does a lookup for xyz.com, and
their ISP's forwarding DNS does not already know the answer, they will
be directed to a root name server. The root name server will provide
the IP addresses of the machines that are authoritative for the domain
in question. The client (or the ISP's forwarding DNS acting on behalf
of the client) will then get the information from one of those. This is
a "recursive lookup".

OTOH, if your domains are all subdomains of xyz.com (e.g. foo.xyz.com),
then you would only need to update the one record. Queries for any
subdomain of xyz.com will be directed first to the servers that are
authoritative for xyz.com. Those servers can answer directly or recurse
again as they see fit.


> I was thinking about that my server points to my root server and
> updates info about IPs, so that root server could send info proper
> info to dns query.

No, not unless you have made some arrangement with the people who run
the root name servers, or are using a dynamic DNS service, or there is
some other special circumstance. Normally, it is exactly the opposite,
the root name servers point people to the server that is authoritative
for a given domain.


--
-| Bob Hauck
-| To Whom You Are Speaking
-| http://www.haucks.org/

Ok, thanks a lot..
No i wasnt talkin about subdomains - i was talking about full domains.
So now.. i must notice every provider of my domains?..
Lets consider this... - i notify my root server ('.com') that my IP
have changed. Domain should work and no problem with that, but i was
thinking that the other damains that im hosting (like www.bogus.net)
would now reference proper to my host.
If someone asks for bogus.net (on .net root) server should
respond with pointing to my host (ns1.xyz.com) - my dns is working so
there should be no problem with that.

Am i wrong again?
(sory, must be sure


--
On Her Majesty's Secret Service
Wojciech -=thezor=- K.
thezorAThostDOTsk

On Fri, 2 Apr 2004 22:06:34 +0000 (UTC), Th3ZoR <(E-Mail Removed)> wrote:

> Lets consider this... - i notify my root server ('.com') that my IP
> have changed. Domain should work and no problem with that, but i was
> thinking that the other damains that im hosting (like www.bogus.net)
> would now reference proper to my host.

Nope. You have to update them both. As I said, some registrars provide
a way to make a mass change like this. I know Verisign does, but I have
not dealt with others.

If you've got them all registered with different registrars than I guess
that's a bit of a bummer. Back in the day before domain registration
was "improved" by adding a web interface for consumers you could write a
script to generate emails to do a change like this.


> If someone asks for bogus.net (on .net root) server should
> respond with pointing to my host (ns1.xyz.com) - my dns is working so
> there should be no problem with that.

The IP of the authoritative server is used, not the name. If you think
about it for a while I'm sure you'll see why. You need an IP eventually,
so the name of the authoritative server would have to be resolved, which
might lead to another name needing resolution, and so on.


--
-| Bob Hauck
-| To Whom You Are Speaking
-| http://www.haucks.org/

On 2004-04-03, Bob Hauck <(E-Mail Removed)> wrote:
> On Fri, 2 Apr 2004 22:06:34 +0000 (UTC), Th3ZoR <(E-Mail Removed)> wrote:
>
>> Lets consider this... - i notify my root server ('.com') that my IP
>> have changed. Domain should work and no problem with that, but i was
>> thinking that the other damains that im hosting (like www.bogus.net)
>> would now reference proper to my host.
>
> Nope. You have to update them both. As I said, some registrars provide
> a way to make a mass change like this. I know Verisign does, but I have
> not dealt with others.
>
> If you've got them all registered with different registrars than I guess
> that's a bit of a bummer. Back in the day before domain registration
> was "improved" by adding a web interface for consumers you could write a
> script to generate emails to do a change like this.
>
>
>> If someone asks for bogus.net (on .net root) server should
>> respond with pointing to my host (ns1.xyz.com) - my dns is working so
>> there should be no problem with that.
>
> The IP of the authoritative server is used, not the name. If you think
> about it for a while I'm sure you'll see why. You need an IP eventually,
> so the name of the authoritative server would have to be resolved, which
> might lead to another name needing resolution, and so on.
>
>

Hmmm, i was hoping that you will not say that IP is used ;]..
Anyway, thanks a lot - you really clear things out for me
.... got to go now - lots of work to do...

Thanks again.
--
On Her Majesty's Secret Service
Wojciech -=thezor=- K.
thezorAThostDOTsk