DNS and Ip's

[mikeshn]

How many IP's has to have the DNS (domain name server)? As I understand 2 IP's. The main IP and Backup... Right?
Thanks

 

[n0cmonkey]

For the dns server itself you will need atleast 1 ip. You are supposed to (isnt it in the RFC?) have 2 dns servers, a primary and a secondary, but for small little things its not necessary.

 

[mikeshn]

What is RFC?

Also Why 2 DNS servers ... Why not just 1 DNS server? Not enough?
Thanks a lot

 

[n0cmonkey]

<< What is RFC? >>



Request For Comment. Its basically a draft for protocols and whatnot as far as I understand them



<< Also Why 2 DNS servers ... Why not just 1 DNS server? Not enough? >>



What will happen if the first DNS server goes down? What do you do when one is running at full capacity and someone else needs to make a request? Add a second one. Like I said, its not as big of a deal for small things like a personal website, but for bigger projects it would be almost necessary. And you should have one of the two hosted somewhere seperate from the first to help with line outages and whatnot.

 

[Zlash]

Yup 2 dns servers, and no need for 2 IPs.

 

[FFC]

An ISP has to have at least 2 in 2 different locations (or at least on 2 different subnets) to get an address allocation approved, at least that's how we do it in Europe.

 

[Poontos]

What is an RFC? Check 'er out.

-->For ISP's who are not accredited Domain Registars: In Canada and probably all of North America, you are required two seperate DNS servers to "fully" host a domain. Which is usually what an ISP does.

ns1.ispdomain.com

ns2.ispdomain.com

Or

ns1.ispdomain.com

ns2.another_host_with_dns_records_for_that_domain_as_backup/redundancy.com

-->For personal use and you want to host your own domain on your own network with a static IP or via a Dynamic DNS service:

ns1.yourdomain.com

ns2.you_isp_who_has_your_DNS_records.com

Would be the best setup.

In Canada at least, the ns (or DNS servers) do not have to be in different subnets or physical locations.

For example:

ns1.ispdomain.com = 10.80.1.1
ns2.ispdomain.com = 10.80.1.2


Hope this helps!

 

[Saltin]

DNS, like any network service, is best served fault tolerant.

 

[Woodie]

<< DNS, like any network service, is best served fault tolerant. >>



LOL at Saltin