Pptp Pass-Through; L2Tp Pass-Through - Panasonic KX-NS1000 Installation Manual

8.6.21 L2TP Pass-through

8.6.20 PPTP Pass-through

Description
For VPN packets that use PPTP and are sent and received from a specified device on the LAN, you can
configure settings so that (1) the port number is not changed when these packets are sent and received and
(2) these packets are allowed to cross the LAN–WAN boundary uninhibited.
Only 1 device on the LAN can be designated as the PPTP pass-through device (acting as either a server or a
client).
Setting
Application
Protocol/Protocol number
Port number
A VPN that uses PPTP is a tunneling protocol, so the send/receive port number for packets additionally
indicates which tunneling protocol the packets are using. If the port number is changed by the dynamic NAPT
(IP masquerade) feature, the information that indicates the tunneling protocol will be lost, and end-to-end
communication will be impossible.
To allow end-to-end communication, specified packets from a specified device are allowed to pass through
the WAN–LAN boundary without having their port number changed.
Conditions
•
Communication across the WAN–LAN boundary is subject to the following conditions:
–
One server–client pair is limited to 1 session.
–
A PPTP-controlled connection can be established from either the LAN side or the WAN side.
–
The GRE tunnel's first packet can be sent from either the LAN side or the WAN side.
*1
–
You must set the LAN-side client's IP address.
*1 GRE: Generic Route Encapsulation
PC Programming Manual References
27.11 Router Configuration—VPN—[3-3] Pass Through
8.6.21 L2TP Pass-through
Description
For VPN packets that use L2TP (Layer 2 Tunneling Protocol) and are sent and received from a specified device
on the LAN, you can configure settings so that (1) the port number is not changed when these packets are
sent and received and (2) these packets are allowed to cross the LAN–WAN boundary uninhibited.
Only 1 device on the LAN can be designated as the L2TP pass-through device (LENS
Setting
Application
Protocol/Protocol number
Port number
366 Installation Manual
Description
PPTP
GRE / 47
*1
TCP/1723: PPTP
Description
L2TP
–
UDP/1701: L2TP
).
*1
Document Version 2016-03