A review of the "Netwar" going on over the Iran protests, from BBC Monitoring.
Iranian elections spark "netwar"
Media feature by BBC Monitoring on 17 June
Online supporters of the defeated presidential Iranian candidate Mir-Hoseyn Musavi have been engaging in a carefully orchestrated "netwar" against pro-government websites as the Tehran authorities tighten their grip on both the mass media and the internet.
Iranians have been actively blogging and posting to Facebook and YouTube images and videos of protests both for and against the re-election of Mahmud Ahmadinezhad for another four-year term.
Activists using Twitter accounts have been urging supporters to use simple hacking tools to flood pro-government websites and stop them from loading.
Note to hackers
Using hacking tools such as BWraep, users can target websites and overload them with requests for images and web pages, which exhausts bandwidth capacity and results in a distributed denial of service (DDoS) error message.
Some government ministry websites, including leader.ir, Ahmadinezhad.ir, and iribnews.ir, were reported to have been brought down using DDoS attacks.
Observations of Twitter streams indicate that these attacks have been encouraged throughout internet social networking communities partly to show frustration of Iranians at the contested re-election of President Ahmadinezhad, which some alleged was fraudulent, from a sense of excitement and "getting caught up in the flow" of things, and partly also in retaliation to the brief closures of some pro-reformist websites on 15 June.