[CentOS] Re: DNS Server

Mon Jun 26 00:53:32 UTC 2006
Les Mikesell <lesmikesell at gmail.com>

On Sun, 2006-06-25 at 19:32, Thomas E Dukes wrote:
> > 
> > Your reverse dns MUST come from whoever owns the ipaddress. 
> > In 99.9 % of the cases that is your ISP. Some (not many) will 
> > actually deligate the reverse dns to you but most will at 
> > best add ptr's that match whatever is in the forward zone.
> > 
> 
> So even if a service such as zoneedit, say they can do reverse DNS, it won't
> work?

The only way it can work is if whoever owns the address range
delegates to them.


> I really don't understand how it can work in one direction and not the
> reverse.  If they can keep up with my IP address and match it to my
> domainanme, seems they could do the reverse.

Names and addresses have a different hierarchy and you have to
work your way down from the top in DNS.  Names belongs to anyone
who registers them; addresses are (mostly) delegated through
ISPs and the DNS hierarchy makes it hard to sub-delegate 
less than a class C block, although CNAME aliases can be
used to let someone else actually provide the info.

-- 
  Les Mikesell
   lesmikesell at gmail.com