As mentioned in this thread, @till is talking about slave records? I was wondering how this is setup. I did a reinstall of my ISPConfig since i had some LE Cert issues which i couldnt resolve. Now i also want DNS Sec working, but i dont really understand how i have to set this up. The 2nd DNS server is already installed and connected to ISPConfig main server. I had it installed as mirror of the primary, but that doesn't seem to be how this is supposed to be setup. p.s. I thought it was time i became HTF Supporter i really enjoy ISPConfig and HTF support! Keep up the good work.