Hello everyone. I was hoping that someone could help me with this: I have one public IP and i'm installing IPSConfig3 over Debian. I'm planning to use it as DNS server also but i don't have a secondary static ip address. I sucessfully conigured ISPConfig ad primary and secondary namerserver but at that time i had access to many public IP's, now i have only one. I don't know if there are some free service to use as secondary DNS server, like Godaddy or something. i can also (but not convinced) use a VM that i have under other static IP under NAT and redirect only the ports used by the secondary nameserver. Thanks everyone and i hope that if there is a solution it can help others.