Field
Description
Available values are all whole numbers from
to
'
, the
default value is
.E
as specified in RFC 2661.
UDP Source Port Se-
lection
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 enabled with
7?
.
The function is disabled by default.
18.3 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).
18.3.1 PPTP Tunnels
In the
PPTP Tunnels
menu, a list of all PPTP tunnels is displayed.
18.3.1.1 New
Click on
New
to set up further PPTP partners.
The
VPN
->
PPTP
->
PPTP Tunnels
->
New
menu consists of the following fields:
Fields in the PPTP TunnelsPPTP Partner Parameters menu
Field
Description
Description
Enter a unique name for the tunnel.
The first character in this field must not be a number No special
18 VPN
Funkwerk Enterprise Communications GmbH
314
R1xxx/R3xxx/R4xxx
