Over the years, storage network technology has been faced with significant changes and there are recent innovations trying to improve the level of service and reliability in storage area network. The need for storage of data and information as well as the increase of security awareness in the general population has brought the concept of Storage Area Network to the forefront. Fibre Channel SANs have become the backbone for serving the information needs of enterprise data centers. This paper presents an overview of SAN technology which is implemented using fibre channel technology, securing a Storage Area Network by using best practices in setting up a SAN. New security protocol called DH CHAP (Diffie Hellman challenge handshake authentication protocol) are implemented to counter the threats and protect data authenticity, confidentiality and integrity.