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ZioByte
Asked: 2018-06-17 12:48:53 +0800 CST

domain default IP for use with reverse proxy

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I have a registered domain with my name.

I want to have multiple servers, with different names, hosted on the same physical host.

This is easy to do using reverse proxy (I am currently using nginx). Problem is I need to configure DNS on my provider site for each and every site I set-up; this is inconvenient.

Is there some way to say to DNS there's a "default" IP for the whole domain? I would like to tell DNS "if domain is XXX.yy and you can't find a better fit then default to xxx.xxx.xxx.xxx".

Is this possible? If so how?

domain-name-system

1 Answers

  1. Best Answer

    It's possible to point every sub-domain to the same IP address using wildcard DNS as specified in RFC 4592 The Role of Wildcards in the Domain Name System, e.g.

    *.example.com. IN A 198.51.100.100

    This points every non-existent subdomain to 198.51.100.100, fulfilling by default your definition of not finding a better fit. This has some limitations i.e. if you have sub1.example.com., the *.example.com. won't cover *.sub1.example.com. See the example from section 2.1.1.

    I can't say whether your "provider site" supports adding wildcard records or not: you must ask them.

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