Today governments face a threat by cyber attacks capable of disrupting communicative, economic and vital services that cause severe damages and losses. It has been years that Islamic republic of Iran benefits from cyberspace in different military and civilian sectors. Sensitive national centers such as nuclear facilities and Ministry of Oil have been targeted by individuals, groups and governments. Therefore this article tries to answer how these cyber attacks may pose security threats to Islamic republic of Iran. Finally appropriate solutions for growing security of cyberspace against cyber attacks will be provided.