Internet dying in Debian?

Linux and Unix-Like Ubuntu
1

For some reason after a while my internet connection dies. I just moved on to Debian from Ubuntu and I can't find the dhclient-program to reconfigure dhcp. Pretty new to *nix's. ONe thing I noticed while rebooting (do get my connection back) is that it configures dhcp and says: reconfigure (or something) 1000 sec (or something). How can I change this?

Regards
Richard

2

Just noticed. I CAN run a dhcp-client as root to make re-establish the connection. And it's 1800 seconds until it dies (half an hour?) . How can I stop this annoying behaviour?