If you’re running your own DNS Server and your internet connection is using DHCP to get the WAN IP, then you might run into the same problem I have.
I have configured my own LAN DNS-Server on a local IP and configured this in /etc/resolv.conf. Periodically the DHCP Client refreshes the WAN IP, thus overwriting my resolv.conf settings.
This problem can be resolved by adding the following line to your /etc/dhcp3/dhclient.conf file:
interface "eth0" {
prepend domain-name-servers 10.0.0.1;
}
In this way your DNS Client will first add your defined domain-name-server to the list sent from your provider