A few years ago I had couple of sites. Then I closed them. Back then, the search engines had added those sites of mine into their databases. Specifically Google and Chinese Baidu know about them. Now their bots query my DNS server for non-existent sites.
The complication is that now I've got a working website. Let's call it
example.com. Those non-existent sites are subdomains like
The traffic is not significant. But why to have it on a daily basis?
As far as I see it, there are two ways to possibly deal with it:
- An administrative way, ie., to contact somehow the search engines and ask them nicely to remove those sites from their databases
- A technical way, ie., to deal with it myself with some BIND9 configuration.
But I just don't know how to approach the issue, frankly.