There are two main purposes for DNS servers.
1. Which you seem familiar with; Yours and the two of your providers
provide information to the rest of the net about your IP numbers and
hostnames. These provide information about your networks IPs and domains
to nameservers all over the world on your behalf for everyone. Two are
necessary in most cases.
2. DNS servers for your users' benefit. They belong to you and check with
DNS servers all over the world mentioned in purpose-1 so that your users'
computer can resolve hostnames and look up IP numbers so their browsers
and internet software will function. They cache the IP numbers/hostname
correlations to make hostname lookups faster for customers. This is what
your Portmasters want to use for DNS numbers. Only one is necessary. But
you can put 2 into a portmaster or a Windows computer. Having 3 of these
available to a customer is completely useless.
Purposes 1 and 2 can be served by the same machine running the lastest
version of BIND, or they can be seperate machines for a variety of
reasons.
-- /* Jason Philbrook | Midcoast Internet Solutions jp@midcoast.com | Internet Access, LAN, WAN, and Linux www.midcoast.com/jp/ | Service and Consulting for Midcoast Maine */- To unsubscribe, email 'majordomo@livingston.com' with 'unsubscribe portmaster-users' in the body of the message. Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>