Digi TransPort WR11, Руководство пользователя

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Configure Virtual Private Networking (VPN) PPTP parameters
Digi TransPort WR Routers User Guide 460
PPTP parameters
The Point-to-Point tunneling protocol (PPTP) is a common way of creating a VPN tunnel to a
Microsoft Windows™ server.
PPTP works by ending a regular PPP session to the peer encapsulated by the Generic Routing
Encapsulation (GRE) protocol. The router uses a second session on TCP port 1723 to initiate and
manage the GRE session. PPTP connections are authenticated with Microsoft MSCHAP-v2 or EAP-
TLS. VPN traffic is protected by MPPE encryption. PPTP does not work with GPRS/HSDPA mobile
operators that assign a private IP address and then apply NAT to the traffic before it leaves their
network. This because the server tries to build a tunnel back to the router on port 1723 but fails
when the traffic is blocked by the mobile operator’s firewall.
PPTP n parameters
Description
An identifier for the router.
Remote Host a.b.c.d
The IP address of the remote host, such as the device that will terminate the PPTP connection.
Use Interface x,y
The interface name and instance to use for the PPTP tunnel. Specifying these parameters allow
the router to raise the interface should it be disconnected. The interface options are:
•
Auto
•
PPP
•
Ethernet
Accept incoming PPTP connections
When enabled, the router acts as a PPTP server and accepts incoming VPN connections.
Enable Server mode
When enabled, the router sends call_out call requests to the remote device. In the default state
which is unchecked, the router sends a call_in request to the remote device.