Implementing Internet Connection Sharing
Microsoft provides with several methods to implement internet connection sharing (ICS). While connection of the local area network with Internet can be easily attained by translated connections using Network Address Translation (NAT) or by redirecting connections. Moreover, to attach local offices and to construct an organizationís network available from isolated locations, Virtual Private Networks (VPNs) are used. Demand-dial links or determined connections can also be used.
The Layer 2 Tunneling Protocol (L2TP) virtual private network tunneling protocol or P-to-P Tunneling Protocol (PPTP) virtual private network tunneling protocol is being utilized to set up VPN connections. Distant access policies are used to administer and protect the VPN connections. Encryption and authentication techniques can be used to shelter the VPN connections. For centralized user authentication, accounting, auditing and authorization Internet Authentication Service (IAS) is commonly used that can be easily incorporated with the Remote Access and Routing Service (RRAS) of Microsoft Windows Server 2003.