I have 2 sites with domains registered in 2 diferrent registrars. Each registrar does the DNS resolving for the site he registered. I want to tell the registrars to change the IPs of the domains and point to a new IP (my PC). Is there something I have to config in ISPconfig or I just have to inform the registrars about the IP change?
You should be able to just use DNS manager, located at your registrar, and point the sites over to your server, providing that your server has a static IP address. After that, you would have to setup the sites in ISPConfig or you'll get a shared page error.
Yes I have static IP. I have allready setup the sites in my PC. My registrar doesn't allow me to play with its DNS Manager, so I'll just have to email them to do that by themselves. So my guess is right, I don't need any special configuration for DNS in ISPconfig in my PC.