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  1. #1
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    Question Same IP, multiple DNS Servers?

    Hello Fellow Gurus

    I'm a little confused over this scenario. So just need confirmation if my understanding is correct. Hopefully this info can help others.

    I have 2 IPs: 1.1.1.1 & 1.1.1.2

    Can I point multiple nameservers at many registrars using those IPs, i.e. ns1.mydomain.com ns1.yourdomain.com ns1.herdomain.com all use same IP 1.1.1.1 ?? That may include registrar not under ICANN (i.e. country-level).

    I think it is theoretically possible? Any problem with this approach? Or do we need unique IP for each "host/ns" registered at registrar?

    Secondly in tinydns, we set it up to listen to specific IP address for a particular nameserver. Do we have a similar setup in BIND, coz its been sometime I played with BIND Do BIND need separate instances/process for each NS to serve queries? Or one process on one machine can answer all kinds of queries?

    Thanks in advance!
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  2. #2
    Join Date
    Dec 2001
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    1,029
    I know with GoDaddy you can, but I'm not sure about other registrars since I've primarily used GoDaddy. I never had a problem with such a setup. You can even point ns1 and ns2 to the same IP address.
    ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ

  3. #3
    Join Date
    Oct 2001
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    By default, BIND listens to all network interfaces. SO, only one named process is needed.

    As for ns for a domain, I think 2 different IPs are required as per some rfc. I may be wrong.
    Some NICs require 2 name servers in different subnet.

  4. #4
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    Thanks ToastyX & taz0 for the confirmation

    That actually means that with 2 IPs alone, hosting companies can setup their resellers private nameservers

    If anyone has any problem with that, let me know and I'll fix it

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  5. #5
    The unique IP requirement was a CNO registry requirement. It has recently been recinded, however some registrar systems may still check...

    -t
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  6. #6
    Join Date
    Dec 2000
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    Originally posted by thewitt
    The unique IP requirement was a CNO registry requirement. It has recently been recinded, however some registrar systems may still check...
    It may be a problem for some of the country code domains, but my understanding was that Verisign was the last holdout to the unique I requirement, and they relented earlier this year.

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