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Page 81 / 119 Scroll up to view Page 76 - 80
77
Chapter 12
Specify Your Network Settings
Router 2 and then to the Server, so the default gateway should
be 192.168.1.2.
•
Interface:
Determined by the port (WAN/LAN) that sends
out the data packets. In the example, the data is sent to the
gateway through the LAN port, so LAN should be selected.
5°
Check to enable this entry and click
OK
to save the settings.
Open a web browser on your PC. Enter the company server’s IP
address to visit the company network.
12° 6°
Set up a
VPN Connection
VPN (Virtual Private Network) is a private network established across the public network,
generally via the Internet. However, the private network is a logical network without
any physical network lines, so it is called Virtual Private Network.
With the wide application of the Internet, more and more data are needed to be shared
through the Internet. Connecting the local network to the Internet directly, though can
allow the data exchange, will cause the private data to be exposed to all the users on
the Internet.
The VPN (Virtual Private Network) technology is developed and used to establish
the private network through the public network, which can provides a secure
communication to a remote computer or remote network, and guarantee a secured
data exchange. IPSec is one of the major implementations of VPNs.
Establish an IPSec VPN tunnel to connect two LANs via Internet so
that the hosts in different remote LANs are able to communicate
with each as if they are in the same LAN.
For example
, I am the network administrator of a regional office,
I need to let my office staff can visit the headquarter’s servers
and resources, and vice versa. I know that the modem router
in my office and the device in headquarter both support IPSec
VPN feature, so I decide to set up a VPN connection with the
headquarter office.
The following diagram is a typical VPN topology. Here Site A
refers to regional office’s network (local network). And Site B
refers to the headquarter’s network (remote network) which I
want to connect.
Done!
I want to:
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78
Chapter 12
Specify Your Network Settings
Modem router 1
WAN: 219.134.112.246
PC 1
Subnetmask: 255.255.255.0
WAN: 219.134.112.247
Modem Router 2
PC 2
LAN: 192.168.2.1
Subnetmask: 255.255.255.0
Site A
Site B
1°
Make sure of the topology you want to build and record site
A (local network) and site B (remote network)’s LAN IP and
WAN IP.
2°
Configuration on site A (local network).
1 ) Visit
http://tplinkmodem.net
, and log in with the password
you set for the modem router.
2 ) Go to
Advanced
>
Network
>
IPSec VPN
to open the
configuration page. Click
Add
to set up a VPN tunnel.
How can I
do that?
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Chapter 12
Specify Your Network Settings
3 ) In the
IPSec Connection Name
column, specify a name.
4 ) In the
Remote IPSec Gateway (URL)
column, Enter Site B’s
WAN IP address.
5 ) To configure
Site A’s LAN
:
In the
Tunnel access from local IP addresses
column, here we
take
Subnet Address
as an example. Then input the LAN IP
range of Site A in the
IP Address for VPN
column, and input
Subnet Mask
of Site A.
6 ) To configure
Site B’s LAN
:
In the
Tunnel access from local IP addresses
column, here we
take
Subnet Address
as an example. Then input the LAN IP
range of Site B in the
IP Address for VPN
column, and input
Subnet Mask
of Site B.
7 ) Select the
Key Exchange Method
for the policy. We select
Auto(IKE)
here.
Page 84 / 119
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Chapter 12
Specify Your Network Settings
8 ) Enter the
Pre-Shared Key
for IKE authentication. Then
keep
Perfect Forward Secrecy
enabled.
Note:
The key should consist of visible characters without blank space.
Make sure Site A and Site B use the same key.
9 ) Leave the
Advanced
Settings as default value. Then click
OK
to save.
3°
Configuration on Site B (remote network). Refer to step 2
configuration on Site A and make sure that Site A and Site B
use the same
pre-shared keys
and
Perfect Forward Secrecy
settings.
4°
The
Status
column will change to
UP
if the VPN connection
has been set up successfully.
5°
Check the VPN connection. You can ping site B’ LAN IP
from your computer in site A to verify that the IPSec VPN
connection is set up correctly.
Tips:
To check the VPN connection, you can do the following.
On the host in Site A, press
[Windows Logo]
+
[R]
to open Run dialog. Input “
cmd
”
and hit
OK.
a .
In the CLI window, type in “ping 192.168.2.x” (“192.168.2.x”
can be IP address of any host in Site B). Then press [Enter].
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81
Chapter 12
Specify Your Network Settings
If Ping proceeds successfully (gets replies from host in Site B),
the IPSec connection is working properly now.
Now IPSec VPN is implemented to establish a connection.
Note:
1. The product supports a maximum of ten simultaneous connections.
2.
If one of the site has been off line for a while, for example, if Site A has been disconnected, on Site B you need to
click
Disable
and then click
Enable
after Site A back on line in order to re-establish the IPSec tunnel.
12° 7°
Set Up the IPv6 Tunnel
The IPv6 Tunnel feature helps you obtain IPv6 resources based on an IPv4 WAN
connection or vice versa.
IPv6 Tunnel is a transition mechanism that enables IPv6-only hosts to reach IPv4
services or vice versa and allows isolated IPv6 hosts and networks to reach each other
over IPv4-only infrastructure before IPv6 completely supplants IPv4. It is a temporary
solution for networks that do not support native dual-stack, where both IPv6 and IPv4
run independently.
The modem router provides three tunneling mechanisms:
6to4
,
6rd
and
DS-Lite
. The
way to set up 6rd and DS-Lite tunnel are similar.
12° 7° 1°
Use the Public IPv6 Tunnel Service-6to4
The 6to4 tunnel is a kind of public service. If there is any 6to4 server in your network,
you can use this mechanism to access IPv6 service. If your ISP provides you with an
IPv4-only connection but you want to visit IPv6 websites
,
you can try to set up a 6to4
tunnel.
Done!

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