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oligofren
Asked: 2021-08-02 03:21:13 +0800 CST

How do I create DNS entries for private addresses on AWS?

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To do any ops work on our servers, we first need to ssh into a DMZ server with a public IP, before ssh-ing on to the app servers, with ips such as 172.16.3.239. I would rather have memorable hostnames, to do something like ssh app.staging, but I am unsure how this works on AWS. I have only setup DNS for globally accessible ips with my registrar, and since the AWS private subnet is for a private range of addresses, this will not work, of course.

I am also sure if I can use any random hostname (that does not clash with a "real" public hostname), or if it would need to resolve to something that would be globally unique (outside of my private subnet).

domain-name-system internal-dns amazon-web-services

1 Answers

  1. Two options are:

    • AWS Route 53 is a hosted DNS service. Create a hosted zone (DNS service) for your servers with the private IPs. You can also create a private hosted zone (private DNS) but then you will need to delegate DNS to the AWS name servers. This is especially useful if you're using load balancers who's IPs change regularly.
    • Hard code the server names in your computer(s) hosts files. This won't scale well to large numbers of servers, large numbers of operations staff, or if IPs change regularly
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