http://blogs.technet.com/b/rrasblog/archive/2005/12/30/there-are-different-types-of-vpn-tunnels-like-l2tp-pptp-etc-which-vpn-tunnel-to-use.aspxI agree that there are too many tunnel option :), but each has its own advantages/disadvantages and customer scenarios. Let us try to understand that in this blog. First a basic preview - there are primarily two usage scenarios of VPN: - First oneen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/rrasblog/archive/2005/12/30/there-are-different-types-of-vpn-tunnels-like-l2tp-pptp-etc-which-vpn-tunnel-to-use.aspx#419594Wed, 15 Feb 2006 09:51:52 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:419594Routing and Remote Access BlogTo start with you need to decided on VPN client and VPN server :). Lets say you are using inbuilt VPN...<img src="http://blogs.technet.com/aggbug.aspx?PostID=419594" width="1" height="1">