Using IPSec with pre-shared keys
Windows XP can be configured to use IPSec with pre-shared keys. This guide explains how it can be impremented at no cost.
You should have a basic knowledge of Windows and using the command prompt.
Windows XP Special Pack 2 should be installed.
Download the Windows Support Tools for SP2 from the Microsoft website and install it. A command line tool, namely ipseccmd.exe, is included and it can be used to set up VPN tunnels using IPSec.
Download the ipseces.msc MMC snap-in and double-click on it to add IPSec Policy Management functionality.
In the example below, we will set up a VPN tunnel using ESP, 3DES and SHA.
192.168.0.1 is the IP address of our computer.
Type in the following three commands to set up the VPN tunnel:
The VPN tunnel is established when we access the 192.168.1.0/255.255.255.0 subnet range. We can, for example, ping 192.168.1.1 to bring up the VPN tunnel.
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