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SME Server:Documentation:Administration Manual:Chapter11 (view source)
Revision as of 08:47, 15 March 2007
, 08:47, 15 March 2007→11.1.2. PPTP
{{DrawBoxNote|content=Your connection to the Internet needs to be established first before you initiate the PPTP connection. This may involve double-clicking one Dial-Up Networking icon to start your Internet connection, then double-clicking a second icon to start the PPTP connection. To shut down, disconnect your PPTP connection first, then disconnect from your ISP.}}
{{DrawBoxNote|content=Your connection to the Internet needs to be established first before you initiate the PPTP connection. This may involve double-clicking one Dial-Up Networking icon to start your Internet connection, then double-clicking a second icon to start the PPTP connection. To shut down, disconnect your PPTP connection first, then disconnect from your ISP.}}
{{DrawBoxNote|content=PPTP uses TCP port 1723 and the Generic Routing Encapsulation (GRE) protocol. If you are using an external router or gateway to your server, and require an inbound VPN connection to support external users, you will need both TCP port 1723 and the GRE protocol to be forwarded.
However most PPTP passthrough routers only allow outbound connections. Not all allow inbound connections. Forwarding PPTP inbound is frequently unreliable due to the way PPTP works.
The simple, reliable solution is to remove the router and let the SME Server handle the link directly.
For a more detailed description of the PPTP protcol see http://en.wikipedia.org/wiki/Point-to-point_tunneling_protocol}}
{{DrawBoxWarning|content=To protect your network, the SME Server enforces the use of 128-bit encryption for PPTP connections, rather than the 40-bit encryption provided in earlier versions of Microsoft's PPTP software. If you are unable to establish a PPTP connection to your server, you should visit http://windowsupdate.microsoft.com/ and download the appropriate update. Due to the dynamic nature of Microsoft's web site, the page may appear differently depending upon the version of Windows you are using. In most cases, you will want to look or search for Virtual Private Networking or a Dial Up Networking 128-bit encryption update . You may need to install the 40-bit encryption update first, and then install the 128-bit encryption update. Note that with Microsoft's ActiveUpdate process, if you are not presented with the choice for this update, it is most likely already installed in your system.}}
{{DrawBoxWarning|content=To protect your network, the SME Server enforces the use of 128-bit encryption for PPTP connections, rather than the 40-bit encryption provided in earlier versions of Microsoft's PPTP software. If you are unable to establish a PPTP connection to your server, you should visit http://windowsupdate.microsoft.com/ and download the appropriate update. Due to the dynamic nature of Microsoft's web site, the page may appear differently depending upon the version of Windows you are using. In most cases, you will want to look or search for Virtual Private Networking or a Dial Up Networking 128-bit encryption update . You may need to install the 40-bit encryption update first, and then install the 128-bit encryption update. Note that with Microsoft's ActiveUpdate process, if you are not presented with the choice for this update, it is most likely already installed in your system.}}