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Eugene
Asked: 2011-06-23 01:23:16 +0800 CST

Change DNS A records dynamically

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For example, I'll buy domain name at godaddy.com. I'll configure it with 2 A records with IPs 123.0.0.1 and 123.0.0.2.
Is it possible to ping it for availability and change A records dynamically by some script?

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2 Answers

  1. There are ways to do dynamic updates with BIND. But they are server-specific, and must be enabled and configured on the server.

    You really need to be asking Godaddy what they support in this area.

    Also note that dynamic DNS is a very poor way to do failover, as to be effective, it requires setting a very short TTL, which ends up wasting lots of bandwidth, and is generally annoying.

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  2. by the sound of it, you have a dynamically assigned ip address from your ISP. You may want to move your DNS to an entity such as DynDNS.com and use a dynamic DNS client on one of your hosts to update your DNS when your dynamic ip address changes.

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