The golden rule of security, stability, and resiliency of virtually anything is “don’t put all your eggs into one basket”. This generally applies to the DNS, and there are some recommendations to avoid having all your nameservers in one domain. I would like to show that in this case, this is not a silver bullet, it depends on many conditions, and using different domains in your nameserver set might even make things not better, but worse.
A couple of weeks ago, I got an email informing me that it had been almost three years since my entry into the Turris project, and I could now purchase the router for a symbolic price of one crown. I did that right away to test for my colleagues whether the system works well; however, it also brought back nostalgic memories. Because three years ago I had the same goal – to test whether everything was working properly – when I filled what was probably the first router lease contract. Those three years have gone by in a flash, so it is perhaps a good time to stop and look back.