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