Here's the situation :
I've got a linuxbox connected to my ISP (cable modem) using dhcp to get my ip-address. The box is used as a firewall and an ip-masq box for the rest of the network. This setup worked fine for about 3 weeks, until yesterday. My ISP changed the ip-address given to linux, but linux didn't see?, accept? reject? the change.
rebooting the system solved the problem. But why isn't this new ip-address accepted automatically?? How can I make sure I don't have to reboot my linuxbox next time my ISP changes the ip-addresses?
Comments only please. I will reject all answers. (And rejected answers don't have a "accept comment as answer" button)