In 2001, Gibson predicted that Microsoft's implementation of the SOCK_RAW protocol in the initial release of Windows XP would lead to widespread chaos by making it easier for Windows XP users to create denial of service (DoS) attacks. In that year, his company's website was brought down by a DoS attack; the attacks continued for two weeks. Gibson blogged about the attacks and his (ultimately successful) efforts to track down the hacker. Three years after the Windows XP release, Microsoft limited raw socket support in Service Pack 2.