Holds all the cards: It seems a crackdown on cyber-opponents of Iranian President Mahmoud Ahmadinejad has taken place after the internet outage in Iran

Iran has demonstrated further evidence of its strict regime after the government cut internet links leaving millions without email and social networks.

Interestingly, the shutdown comes at a time when inhabitants are preparing to celebrate the 33rd anniversary of the Islamic Revolution, with rumours of anti-government protests also planned.

But some internet boffins are rising above the crackdown, and accessing the web by using proxy servers over VPN connections.