Internet domain registrar GoDaddy was knocked offline for more than four hours Monday, prompting speculations it could have been attacked by hackers.
At least one group claiming to be affiliated with the hacktivist group Anonymous claimed credit for the outage, security vendor Sophos reported Tuesday (Manila time).
"GoDaddy has been a popular target for the '99 percent' since they publicly announced support for the Stop Online Piracy Act (SOPA) in late 2011," Sophos said in a blog post.
But it said the failure appeared to be more a problem in its DNS infrastructure.
A separate report on Wired.com said GoDaddy has let its rival Verisign host its DNS servers.
Sophos noted GoDaddy is not just the largest supplier of domains, but also services many of those domains with DNS, email and web hosting services.
For now, it said there is still no explanation of what happened to GoDaddy.
"It might be a good time to review your critical infrastructure and ask your service providers what capabilities they have to ensure your business stays online if you are targeted or have equipment failures," it said. — TJD, GMA News