What is OpenVPN GUI ?

OpenVPN GUI is a graphical front-end application for OpenVPN on Windows. It gives you an icon in the system tray from which you can control OpenVPN.

This tutorial will describe how to connect to OpenVPN server from windows xp client.
If you searching about How To Configure OpenVPN server in FreeBSD 7.2 then you can click this URL below
http://www.wowtutorial.org/freebsd/install-openvpn-freebsd-72-347.html

Download & Install OpenVPN GUI

You can download OpenVPN GUI from this url below :
http://openvpn.se/files/install_packages/openvpn-2.0.9-gui-1.0.3-install...

After download finished, then just install it.
If in the middle of the installation it prompt something like install TAP adapter click continue or cancel.
you can just simple choose/click continue until the installation finished.

Request ca.crt, client1.crt & client1.key from server

Previously we have generated those keys in the OpenVPN server.
so we can just simple download ca.crt, client1.crt and client1.key from server.
and upload it into our windows xp client directory in

upload ca.crt, client1.crt & client1.key from server to "c:\Program Files\OpenVPN\config"

Create a openvpn.ovpn file

Next, we will need to create a openvpn.ovpn file.
this file will contain all server information so client and server can recognize each other from the client settings.

Create openvpn.ovpn files in c:\Program Files\OpenVPN\config\openvpn.ovpn
below is the sample of client1 openvpn.ovpn file

### sample openvpn client1 config file ###

client
dev tap
proto udp
#change the remote ip into your OpenVPN server public ip address
remote 10.10.10.01 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client1.crt
key client1.key
auth-user-pass
verb 3
comp-lzo

Connect to OpenVPN server

Click on the "OpenVPN GUI" in your windows xp client tray icon and it will automatically prompt username and password.

Input user and password that we previously created in OpenVPN server.
Ex ; client1.

You should be able to connect to the OpenVPN server without any problem.
Windows client will automatically get internal ip address like 10.8.0.2 etc..
And it will automatically NAT so your windows xp client also will be able to surf the internet with OpenVPN server external interface ip address :)