SIP User's Manual 304 Document #: LTRT-12804
Mediant 800 MSBG
3.3.3.9.6 Point-to-Point Tunneling Protocol (PPTP)
Point-to-Point Tunneling Protocol (PPTP) is a protocol developed by Microsoft targeted at
creating VPN connections over the Internet. This enables remote users to access the
device via any ISP that supports PPTP on its servers. PPTP encapsulates network traffic,
encrypts content using Microsoft's Point-to-Point Encryption (MPPE) protocol that is based
on RC4, and routes using the generic routing encapsulation (GRE) protocol. PPTP is
targeted at serving two purposes:
Connecting the device to the Internet when it is used as a cable modem, or when
using an external cable modem. Such a connection is established using user name
and password authentication.
Connecting the device to a remote network using a Virtual Private Network (VPN)
tunnel over the Internet. This enables secure transfer of data to another location over
the Internet, using user name and password authentication.
¾ To create a PPTP connection:
1. In the 'Connections' page, click the New
icon; the Connection Wizard opens.
2. Select the 'Advanced Connection' option, and then click Next; the 'Advanced
Connection' page appears.
3. Select the 'Point-to-Point Tunneling Protocol (PPTP)' option, and then click Next; the
following page appears.
Figure 3-241: Defining PPTP Properties
4. In the 'PPTP Server Host Name or IP Address' field, enter the PPTP server host name
or IP address provided by your ISP.
5. In the 'Login User Name' and 'Login Password' fields, enter the username and
password provided by your ISP.
6. Click Next; the following is displayed if successfully configured:
Figure 3-242: PPTP Connection Added Successfully
7. Select the 'Edit the Newly Created Connection' check box if you want to edit the new
connection after clicking Finish.
8. Click Finish to save the settings; the new PPTP connection is added to the network
connections list.