VPN is a trusted and secure network, which use tunneling and protocol(PPTP,L2TPIPSec) to make data transmission through the public network. RAS: remote access service used to access server remotely from client terminal using dial-up connection. IAS:Internet authentication service is used to remotely and centrally manage all RAS server and keep remote access policy … [Read more...] about How to Configure VPN,RAS and IPSec Policy in Windows Server