Israel Folau says he is disappointed by the decision to suspend his crowdfunding campaign and revealed he was targeted in a cyber attack on the launch of his campaign.

Folau claimed crowdfunding website GoFundMe "buckled" to pressure when it announced on Monday morning that it had taken down Folau's site and would refund almost $700,000 in donations.

Israel Folau's controversial appeal for financial assistance for his legal fight against Rugby Australia has been shut down by GoFundMe Australia. Credit:AAP, GoFundMe

He also revealed his website had been subject to a denial of service attack, which was understood to have taken his team 12 hours to rectify last week.

"Since requesting public donations to help him with his legal action against Rugby Australia, Israel and his supporters have come under intense scrutiny in the media," a spokesman said.