Ok so I've installed 2 DNS servers, I want to use one as main and another one as slave. I did the usual fresh install, after that installed bind and then ISPConfig. After that in the interface I configured ns2 to mirror ns1. All is ok domain is working, both are having the zones no error in the logs, but when I scan my domain with some websites I always get error like: Code: The listed nameservers for domain.com does not all report the same set of nameservers. Superfluous name server listed at parent: ns1.domain.com Superfluous name server listed at parent: ns2.domain.com Is this normal because of the ISPConfig method? Because I checked named.conf.local on both servers are listed as master and non as slave.