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Re: DNS Registration (or: the chicken and the egg)





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> From: Eli Marmor <marmor@macs.biu.ac.il>
> To: linux ILUG <linux-il@linux.org.il>
> Subject: DNS Registration (or: the chicken and the egg)
> Date: Friday, January 16, 1998 1:58 PM
> 
> Hi!
> 
> I hope to be on air again on Sunday (I have a frame-relay which was
> connected to StarNet Za"L). Meanwhile, I try to configure my own
> primary DNS, and enter into a problem of a chicken and an egg:
> 
> The IP of most of the domains is decided by accessing a primary DNS
> which is part of these domains. e.g. try the command:
> 	whois -h whois.ripe.net globes.co.il

Not quite right. What happens is something CLOSE to the following:

You query one of the root servers (e.g. c.root-servers.net) about co.il.
You are answered that relay.huji.ac.il (for example) is in charge of that
domian.
You query relay.huji.ac.il about elmar.co.il and get in response the IP
address or all registerd DNS servers for that domian and THEN you can query
those servers about specific hosts in that domain.

For example (with a COM. domain, so the root server here is in charge of
the top level domian already):

/u/net33/gby> nslookup
Default Server:  actcom.co.il
Address:  192.114.47.1
 
> server c.root-servers.net
Default Server:  c.root-servers.net
Address:  192.33.4.12
 
> benyossef.com.
Server:  c.root-servers.net
Address:  192.33.4.12
 
Name:    benyossef.com
Served by:
- NS1.NETNAMES.NET
          195.40.151.1
          benyossef.com
- NS2.NETNAMES.NET
          195.40.150.1
          benyossef.com
 
 
> server ns1.netnames.net
Default Server:  ns1.netnames.net
Address:  195.40.151.1
 
> www.benyossef.com.
Server:  ns1.netnames.net
Address:  195.40.151.1
 
Name:    www.benyossef.com
Address:  195.40.151.3
 
> exit

The full details can bve found in "DNS and BIND" from O'Reilly. A shorter
and simpler description can be found in the DNS-howto.

> 

Gilad.


PS. Me, personally prefer to get a personal response EVEN if the list is
CCed and vice versa so I'm doing the same - if someone is deeply offended
by it... well, it's  a tough world ;-)