Field Description
UDP Source Port Selec-
tion
Select whether the LNS should only use the monitored port
(UDP destination port) as the local source port for the L2TP
connection.
The function is activated with Single.
The function is disabled by default.
14.3 PPTP
The Point-to-Point Tunnelling Protocol (=PPTP) can be used to set up an encrypted PPTP
tunnel to provide security for data traffic over an existing IP connection.
First a connection to an ISP (=Internet Service Provider) is set up at both sites. Once these
connections are available, a tunnel is set up to the PPTP partner over the Internet using
PPTP.
The PPTP subsystem sets up a control connection between the endpoints of the tunnel.
This is used to send control data to set up, keep alive and terminate the connection
between the two PPTP tunnel end-points. As soon as this control connection is set up, the
PPTP transfers the traffic data packed in GRE packets (GRE = Generic Routing Encapsu-
lation).
14.3.1 PPTP Tunnel
In the PPTP Tunnel menu, a list of all PPTP tunnels is shown.
14 VPN Funkwerk Enterprise Communications GmbH
254 bintec W1002/W1002n/W2002/WIx040/WIx065
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