Head of Iran's Passive Defense Organization Brigadier General Gholam-Reza Jalali said Monday that Iran's nuclear facilities were immune to cyber attacks, the official IRNA news agency reported.

"Iranian experts are knowledgeable enough about the cyber threats and all the country's nuclear facilities are immune to cyber attacks," Jalali was quoted as saying.

So far, no trace of cyber attacks or viral threats in Iran's energy sector have been reported, he told IRNA.

Currently "many of the enemy's threats have been directed towards the nuclear energy, e-commerce and the financial and banking sectors (of Iran) and the country's experts are monitoring them," he added.

In October 2011, Jalali said Iran would establish its first cyber command that would be tasked with monitoring, identifying and countering cyber threats against the national infrastructures.

In August, Jalali said Iran planned to hold a massive "cyber security maneuver" to enhance readiness against possible cyber attacks against the country and to assess the ability of its organizations and departments to prevent cyber intrusions.

Iranian Intelligence Minister Heidar Moslehi announced in October 2010 that Iran had detected and thwarted a virus aimed at infecting the country's nuclear plant system.

Iran said the computer worm, Stuxnet, infected 30,000 IP addresses in Iran, including the personal computers of the staff at the country's first nuclear power plant, Bushehr. It also claimed that Israel and conglomerate Siemens were behind the infection of Iranian industrial sites.

Iran's ministry of communications and information technology announced earlier to test its national internet with the help of a limited number of users, in an effort to provide Iranians with higher-bandwidth internet access.

Also known as the "Clean Web," the initiative seeks protection against the "loose commitment to ethics and morality" across the World Wide Web.

According to local reports, Tehran has also undertaken a project to develop a national search engine dubbed "Ya Haq" by early 2012, which can be accessed through the domestic internet.

In the past days, access to emails in the Islamic republic has faced problems and locals and business sectors found it difficult to communicate on-line with their domestic and international partners without using Virtual Private Network (VPN), the use of which is illegal in the country.