Howto setup public DNS Server
 

How to setup public DNS Server, like opendns.com and google

waiting for replies !!!!

why don't you do some research and when you get stuck on something THEN
post a question on the exact problem .

we will not do your work for you.

??? two posts in April 2010
then one now 14 months later ???

hi john,

i known how to configure dns server on LAN,
but i don't know how to configure for public.

plzzz help me !!!!

Are you referring to like using bind with a split dns?

There is really not a whole lot that is different. The DNS needs to be authoritative for the zone. In most cases it is likely that you will only be able and interested in forward domain look ups. If you want reverse look ups to resolve to your domain you will need to talk to you ISP. One thing to consider with the public DNS is that RFC 1918 addresses, such as those used on a LAN won't route and should not be returned in response to a query. Instead only the public IP addresses should be given out. You will need to have port 53 open to the public for the DNS to be available. Once you can connect to it on your public interface and get resolution, you can then go to your domain registrar and update your registration to indicate that your server is the DNS for this domain, which will then propagate through the DNS system, typically in about 24 hours. At this point, you are using your own public DNS.

If you decide to do this, you should also research how to properly secure it, for example understand how to run it in a chroot environment.