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Chapter 12
Specify Your Network Settings
•
Gateway:
The IP address of the gateway device to which the
data packets will be sent. This IP address must be on the same
subnet with the router’s IP which sends out the data. In the
example, the data packets will be sent to the LAN port of
Router 2 and then to the Server, so the default gateway should
be 192.168.0.2.
•
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
Done!
I want to:
