The time has come to connect our server to the Internet. I assume that you are using an 'unlimited' usage broadband connection that has a static IP address. If you .don't have a static IP address, ask your ISP for one and write it down somewhere. Having a static IP address is very important.

Now ask your ISP service person to configure your modem to be always-on, i.e., you don't need to enter a password to access the Internet. This constitutes entering the user name and password into the modem itself so that it authenticates every time it switches on.Run a length of RJ-45 wire from the port on your modem to the network card socket on your motherboard.
Your NIC will have a device node ethO. Add the following two lines to the letclresolv.confme:

nameserver 208.67.222.222 nameserver 208.67.220.220
ifconfig ethO 192.168.1.2
route add default gw 192.168.1.1 ## assuming this is your gateway address-the IP address of your router
ifconfig ethO up

Now reboot the system and try to browse the Internet. Everything should work.
At this stage, run an apt-get update and apt-get distupgrade to upgrade all installed packages to their latest versions.