Primary and secondary NS on dynamic IP adsl?

[Wouter Van Crombruggen]

I am sorry to say, but it won't work (at least not if your namserver is
within the same domain as the one it serves). Why not? Well let's say you
have the domain foo.com and you want to run your own nameservers ns1.foo.com
and ns2.foo.com. The IP addresses of this name servers will have to be known
to the world's root servers, this is known as "glue records". Why? Suppose
they only knew to look for information about www.foo.com on ns1.foo.com, how
would they ever find the IP of ns1.foo.com, if they needed exactly that
server to look on? Now the root servers are updated once or twice a day, and
TTL value of glue records is set to two days. As you said you have dynamic
IP addresses, this would mean you have to change your glue records every x
days (depending on how dynamic your IP is) and wait for two days for the
changes to propagate. This will seriously endanger the uptime of your
domain. However, you could use a dynamic DNS service, such as dyndns.org,
and use foo.dyndns.org and foo2.dyndns.org as nameservers for foo.com. As
they are on a different domain, they will be found in the DNS system and
should work fine (if the dynamic dns system is reliable).

"Willy Kreim" <willykk at my-deja.com> wrote in message
news:9fr20o$nuk at pub3.rc.vix.com...
>
> Hi,
>
> Here's the situation:
>
> - I've got two residential-grade DSL links. 512/128k each. Both have
> dynamic ip addresses.
> - I've got mydomain.com, currently hosted on a hosting provider
> (Linux/BIND)
>
> What I'd like to do (IF possible, and if not possible I'd like to do
> it too ;-):
>
> create "ns1.mydomain.com" and "ns2.mydomain.com", and host EACH dns
> server in one of my adsl links. Actually, if possible, I'd like to
> mask a single dns server using both of my public IP addresses (no
> redundancy=bad practice, I know :) to the same linux PC running BIND.
> (I've got Linksys routers with port forwarding on each dsl link :-).
>
> Let me explain: ("a picture is worth a thousand words"):
>
> --[DSL#1][Cisco 677](200.x.y.z dyn-ip, NS1.mydom...) fw dns port-\
> --[DSL#2][Cisco 677](200.r.s.t dyn-ip, NS2.mydom...) fw dns port-|
>                                                                  |
>                         Single dns server on private IP. (10.x.x.x)
>
>
> Is this possible? I'd like to keep the main page (www.mydomain.com,
> mydomain.com) on the current unix/linux webhosting account, but serve
> ALL other subdomain names from my own dns and http server.
> I will be adding sub-domain entries on a daily basis and can't bother
> my hosting sysadmin with all that hassle.
>
> Currently I have to bug the sysadmin for every dns addition/removal. I
> want to change that, and let the hosting isp care only for
> mydomain.com, and let me manage and serve "mysubdomainx.mydomain.com
> mysubdomainy.mydomain.com" etc. Get the idea of what I'm trying to do?
>
> Is this possible? Yes? No? Maybe? Am I losing my mind?
>
> Regards
> Willy
>
>