I'm relatively new to dns so bear with me. BTW Ispconfig 3 is awesome. I use intodns.com to test my dns setup. My puzzle is this. I have two servers running ispconfig. server 1 and server 2 - server 2 is for testing and as a slave name server so ns2.server2.com My main site is also the name of my machine so domain.com is served by server1.domain.com When I use A records to redirect ns1 or ns2 designations within my network; ns1 to machine server1.domain.com and ns2 to server2.domain.com I can only us my external ip address. If I use internal the internal address intodns.com flags an error as mismatched ip addresses. Am I missing a record or something? Should I use for instance A record ns1.server1.com server1.domain.com and A record ns2.server2.com server2.domain.com?