I did setup two name server as in "https://www.howtoforge.com/how-to-r...and-secondary-with-ispconfig-3-debian-squeeze" all works fine but when trying to write rDNS record in RIPE NET getting ther following mistake "Parent has nameserver(s) not listed at the child". Any idea how to fix this ?
My quess would be the name server NS records are different on the two name servers or differ from what the domain name registrar knows. Check your domain with whois, what nserver records does it show? Then see that all the name servers have same NS records and IP-numbers for those.
I tried to registered other way and got another message like "None of the following nameservers is a recursor : ns1.speedline.ge, ns2.speedline.ge.". If I don't mistake it means that both server became Master or ..., I did setup both servers according ISPConfig manual (3.2.1.5 Installing the Primary DNS Server; 3.2.1.6 Installing the Secondary DNS Server).