First assuming you already had rpmforge yum repos.
Just need to get open rpm installed..

 yum install openvpn -y

Now start configure it :
get into the OpenVPN configuration folder

  cd /etc/openvpn/

Generate the secret key at the server ..
(this file shall be transferred to each client too..)

 openvpn --genkey --secret ta.key

Now get the rest of cert and generate appropriate keys/pair.
The tools are provided under the following directory

  cd /usr/share/doc/openvpn-2.0.9/easy-rsa/

make all the script there it executable ..

  chmod a+x *

Prepare the output keys folder

  mkdir keys
  ./vars

Clean it up..

 ./clean-all

Start building server key first ..

 ./build-ca
./build-key-server home.namran.net

Okay .. now try to add a client cert to it..

 ./build-key nbnamran

Some encryption/decipher thing..

 ./build-dh

Now copied the generated keys/cert into openvpn configuration folder.

  cp /usr/share/doc/openvpn-2.0.9/easy-rsa/keys/* /etc/openvpn/

Time to config the configuration file ..
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