So what did Australian Defense Forces confirm really?

""An Australian Defence Force spokesperson confirmed Iranian reports that two of its warships had encountered a Royal Australian Air Force reconnaissance aircraft in the Indian Ocean earlier this month, but denied there was a confrontation. "An Australian AP-3C Orion encountered an Iranian frigate during a routine Operation Gateway patrol on 10 March 2013," said a Defence Department spokesperson. The Iranian Navy ships were reportedly heading home after a port visit to Zhangjiagang in China and were nearing Sri Lanka when they were intercepted by the Australian aircraft. The Iranian Fars News Agency claims Iran's 24th fleet, which comprises the support ship Kharg and the frigate Sabalan, forced the aircraft to turn away."" (thanks Amir)