http://blogs.technet.com/b/rrasblog/archive/2006/12/15/vpn-tunnel-across-web-proxy-nat-and-firewall-no-kidding.aspxI am sure at times you might have faced this problem where PPTP or L2TP based VPN connection does not go through. This may be in some hotel or when you are visiting a customer or partner site etc. This is primarily due to PPTP GRE port blocking or L2TPen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/rrasblog/archive/2006/12/15/vpn-tunnel-across-web-proxy-nat-and-firewall-no-kidding.aspx#603669Sun, 21 Jan 2007 08:10:41 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:603669 Microsoft developing new VPN protocol called SSTP - Security Tools News & Tips<p>PingBack from <a rel="nofollow" target="_new" href="http://securitytnt.com/microsoft-developing-new-vpn-protocol-called-sstp/">http://securitytnt.com/microsoft-developing-new-vpn-protocol-called-sstp/</a></p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=603669" width="1" height="1">