#BRIDGED SETUP
#
apt-get install openvpn liblzo1 liblzo2-2 bridge-utils 
cp -Rv /usr/share/doc/openvpn/examples/easy-rsa/2.0/* /etc/openvpn/
cd /etc/openvpn/
vi vars
#edit the last lines in the file
#
# eg:
#export KEY_COUNTRY="NL"
#export KEY_PROVINCE="ZH"
#export KEY_CITY="Amsterdam"
#export KEY_ORG="virtcomputing.com"
#export KEY_EMAIL="noc@virtcomputing.com"

#set the variables
./vars 
./clean-all
./build-ca
./build-key-server server

#As common name we give "server", answer "yes" to
#-Sign the certificate? [y/n]
#-1 out of 1 certificate requests certified, commit? [y/n]

./build-dh

#build keys for client(s)
./build-key client1

# All generated keys are now in /usr/share/doc/openvpn/examples/easy-rsa/2.0/keys/
# and need to distributed over the server/client(s)

cp keys/{ca.crt,server.crt,server.key,dh1024.pem} /etc/openvpn/
chmod 600 /etc/openvpn/{ca.crt,server.crt,server.key,dh1024.pem}


vim /etc/openvpn/vpn_server.conf
-------------------------
port 1194
proto udp
dev tun
ca /etc/openvpn/ca.crt
cert /opt/keys/server.crt
key /opt/keys/server.key
dh /opt/keys/dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
client-to-client
keepalive 10 120
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3
-------------------------


Articles to study/read:

http://www.uno-code.com/?q=node/50
http://www.uno-code.com/?q=node/120