Chapter 18 VPN
LTE3316 Series User’s Guide
126
18.5 GRE
GRE tunnels encapsulate a wide variety of network layer protocol packet types inside IP tunnels. A GRE
tunnel serves as a virtual point-to-point link between the Zyxel Device and another router over an
Internet protocol network.
Remote Subnet
Specify the remote subnet for this L2TP tunnel to reach L2TP server. The
Remote
Subnet
format must be IP address/netmask (e.g. 10.0.0.2/24).
The
Remote Subnet
is used for the L2TP VPN server’s Intranet. At the L2TP client’s side,
the packets whose destination is in the dedicated subnet will be transferred via the
L2TP VPN tunnel. Other packets will be transferred based on current routing policy of
the security gateway at L2TP client peer.
If you entered 0.0.0.0/0 in the
Remote Subnet
field, the L2TP server will be treated as
a default gateway setting for the L2TP client. This means all packets, including the
Internet accessing of L2TP Client, will go through the established L2TP VPN tunnel.
Tunneling Password
(Option)
Enter the password for this L2TP VPN tunnel to be authenticated by the L2TP Server.
LCP Echo Type
Specify the Link Control Protocol (LCP) Echo Type for this tunnel. This means the Zyxel
Device checks the PPP connection to a remote client using LCP requests.
In the
Interval
field define how often the LCP requests are prompted. If there is no
reply to an LCP request then the remote client is checked in shorter intervals. Define
how many times the Zyxel Device tries to reach the remote site in the
Max. Failure
Time
.
• Select
Auto
for the Zyxel Device to automatically set the
Interval
and
Max.
Failure Time
.
• Select
User-defined
to define the
Interval
and
Max. Failure Time
. The default
values is
30
seconds
and
6
Times respectively.
• Select
Disable
to disable LCP Echo Type.
Service Port
• Select
Auto
for the Zyxel Device to automatically define the service port for the
L2TP tunnel to use.
• Select
1701 (for Cisco)
for the Zyxel Device to use port 1701 to connect to the
Cisco L2TP server.
• Select
User-defined
to define the service port (1~65535) for the L2TP tunnel to
use.
Back
Click
Back
to return to the previous screen without saving.
Cancel
Click
Cancel
to exit this screen without saving.
Apply
Click
Apply
to save your changes back to the Zyxel Device.
Table 51 L2TP Client: Add (continued)
LABEL
DESCRIPTION
Содержание LTE3316-M604
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