My ISP has taken to changing my address, which is their right. I was set up with zones for all my domains on my registrars DNS. And would have to change them all every time the IP changes which is a pain. My registrar does not support dynamic DNS so I opened an account with DynDNS.com. I changed the name server with my registrar for my main domain to the DynDNS nameservers. I set up A records there for the domain, www, ftp, ns1 and ns2. This is all working fine for the main domain. Also I changed my other domain names with my registrar to point to the ns1 and ns2 of my main domain. These are resolving now to my internal IP address, 10.0.0.100. I am guessing that I needed to change the DNS in ISPConfig to the external address now instead of the internal one. I did this and don't see an immediate fix but may need wait for net propagation. Is the above correct? If so, since I am running a local client via cron to update the DynDNS service, is there a way I can update the local DNS automatically at the same time? For example, modifying their client to rewrite the dns conf file(s). (DynDNS charges for each custom domain name so obviously I only want one there and the other thirty four locally).