Testing of Recursive DNS Resolvers

Here’s a high-level overview of what you need in order to start testing recursive DNS servers.

  1. Purchase a domain for your tests e.g., example123.com using your favorite domain registrar.
  2. Get 2 Linux VPS instances with public and static IP addresses - these will be your nameservers.
  3. Deploy the PolarDNS server on both instances.
  4. Edit the polardns/polardns.toml configuration file on each instance and change your domain name and nameserver IP addresses accordingly - same configuration on both.
  5. In the domain registrar, select to manage the domain using your own nameservers. You will need to specify the primary and secondary NS - provide IP addresses of your instances.

Now your infrastructure should be ready for testing of any recursive DNS resolver of your choice.

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