Wi-Fi service is back in operation at Guantánamo Bay – after it was shut down recently as a precaution against hacking, news reports said.

The U.S. Navy base at Guantánamo Bay said it had shut down free Wi-Fi service for troops and base residents because of concerns about “Anonymous,” a troublesome global hacking group.

Anonymous wanted its followers to send large numbers of e-mails to mess up the base’s computers – in a show of “solidarity” for over a hundred prisoners at the base who are on a hunger strike.

The hackers wanted to see “twitterstorms, e-mail bombs and fax bombs, in three days of nonstop action,” The Miami Herald reported. As part of the online effort, hackers also posted numbers of the White House and military command centers.

The hackers called their online effort "Operation Guantanamo," the BBC said. It started on May 18.

The Wi-Fi service is offered at the base’s bar and coffee shop. The military is still monitoring online activity there.

It appears that access to Facebook (News - Alert) and Twitter was also blocked by the military’s actions – as an added precaution, news reports said.

“We are continually monitoring our system for security breaches and/or threats to the network,” a spokeswoman said in an e-mail to the Herald, “and take the necessary precautionary measures to defend against these threats.”

Also, Army Lt. Col. Samuel House was quoted by the media as saying, “From my foxhole, the hacktivist campaign was a failure.”

The hacking effort is far from the only controversy involving the base. Earlier this year, U.S. officials denied they were eavesdropping on prisoners held at the base, located on the island of Cuba, TMCnet reported. There were allegations that U.S. officers were using hidden microphones in courtrooms, meeting huts or in the prison compound. The devices were allegedly used to listen in on private talks between defense lawyers and five of their clients who were suspected of being involved in the Sept. 11 terrorist attacks, reports said.