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Freecom Data Tank Gateway
5. Setting up Virtual Private Networks (VPNs)
A Virtual Private Network (VPN) is a computer network that uses a public network such as
the Internet to transfer private data. VPN users can exchange data just like in an internal
LAN. VPN is often used by companies as a way of providing access to the company net-
work to staff when they are out of the office. The process involves the Data Tank Gateway
establishing a VPN connection to the company's VPN gateway. Using this connection,
the employee is then able to perform his duties as if he/she were working directly in the
company's local area network.
Open
Connections
->
VPN
->
ADD Connection
in the main menu.
5..1 IPsec
Status
You can enable or disable the VPN connection at any time here.
Name
Please enter any name of your choosing for the connection here.
Remote Host IP
In this field, please type in the IP address of the VPN routers that you wish to connect to
(you need to have an account on this router).
Remote Network
Enter the IP address and the network mask that you want to access. Example: 192.168.1.0/24.
The '0' at the end of the IP address signifies that you can reach any PC in the network
under the IP addresses 192.168.1.1 – 192.168.1.254. /24 indicates that this is a network
mask 255.255.255.0. If the network you are attempting to access contains several subnets
with the net mask 255.255.252.0, please enter /22 in place of /24.
ESP Encryption
This is where you set the encryption protocols. You can keep the default settings, although
they have to be supported by the remote machine.
ESP Encryption Des
Triple DES (3DES) is an advanced version of the Data Encryption Standard (DES). The old
DES only used key lengths of up to 56 bits. 3DES on the other hand uses three encryp-
tion cycles and two or three keys. By using three keys, an actual key length of 112 bits is
provided.
