in this scenario, you have to let the server power on so it could provide such services. do you have any concern on this? Or, when the server is power down, you could change your local Lan host's hostname to the server's in order to pass the Roger's DHCP authentication, and change to DHCP as well, then you could get the valid IP, DNS, etc from Rogers, and they will access the Internet and you probably feel comfortable about the security of your server.