But, the report said, users were switching to Google's DNS, the address of which is well-known, and hence getting around the block.
Others, who were concerned that Google logs data, were using OpenDNS which is owned by Cisco, the report said.
Laurie Patton, head of Internet Australia, the peak body for Internet users, has said of the judgment: "You close them down and they reappear in no time on another site and/or with another name – it's called ‘whack-a-mole’. What's more, anyone with a modicum of technical knowledge can always find a way to access what they want, lawfully or unlawfully."
The costs of blocking the sites have to be borne by the rights holders, with the court have determinbed that it would cost $50 to block each domain.
The site blocking has to be done under court supervision.
Changes to the copyright laws in 2015 made it possible for content owners to apply to the courts to seek injunctions against ISPs so that they would have to block sites that were deemed to be infringing the content owners' rights.
The court also ruled that content owners would have to pay the costs of the case.