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I'm trying to set up a self hosted DNS server for my website using bind and I want to set it to redirect to a custom error site (set all records to CNAME of error.my.domain maybe) if the qps reaches a threshold, and change the respective records back after a set period (say, 10 mins or so).

Is it possible to do so using only bind configs? If not, are there any alternative solutions?

Francie Jiang
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    Note that you don't control how well others honour the TTL of your DNS records and using such an approach is not always guaranteed to work in a timely fashion. – HBruijn Feb 05 '24 at 08:21
  • ISC Bind doesn't have a built in health check function to monitor external services, but you can for example have your monitoring and alerting trigger script to update your DNS records with the nsupdate command.

    See for example an older answer of mine here and the manual https://bind9.readthedocs.io/en/v9.18.21/reference.html#dynamic-update-policies.

     – HBruijn Feb 05 '24 at 08:21

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