You will need to give your internet connection a static ip address if it does not have one. You will need DYNDNS. You will setup an account set your ip address, download the updating application, configure it and run it.
If you would like to block certain websites to increase office productivity then you will need OPENDNS. You will then need to create an account. Assign the DYNDNS hostname to the account, set the account to block specified websites then download the updating application, program the application and run the application.