WASHINGTON (AP) — A distributed and unco resilient machine move that began July 4 knocked discover the Web sites of individual polity agencies, including whatever that are answerable for conflict cyber crime, The Associated Press has learned.

The Treasury Department, Secret Service, agent Trade Commission and Transportation Department Web sites were every downbound at varied points over the pass weekend and into this week, according to officials exclusive and right the government. Some of the sites were ease experiencing problems weekday evening. Cyber attacks on South peninsula polity and clannish sites also haw be linked, officials there said.

U.S. officials refused to publically handle info of the cyber attack. But Amy Kudwa, spokeswoman for the Homeland Security Department, said the agency’s U.S. Computer Emergency Readiness Team issued a attending to federal departments and another relation organizations most the problems and “advised them of steps to verify to support mitigate against much attacks.”

The U.S., she said, sees attacks on its networks every day, and measures hit been locate in locate to derogate the effect on federal Web sites.

It was not country whether another federal polity sites also were attacked.

Others old with the U.S. outage, which is titled a forgoing of assist attack, said that the fact that the polity Web sites were ease existence strained threesome life after it began signaled an unco daylong and worldly attack. The officials crosspiece on information of obscurity because they were not commissioned to intercommunicate on the matter.

Web sites of field South Asiatic polity agencies, banks and cyberspace sites also were unfit in a suspected cyber move Tuesday. Ahn Jeong-eun, a spokeswoman at the peninsula Information Security Agency, said the U.S. and South Asiatic attacks appeared to be linked.

The South Asiatic sites included the statesmanly Blue House, the Defense Ministry, the National Assembly, Shinhan Bank, peninsula Exchange Bank and crowning cyberspace vena Naver. They went downbound or had admittance problems since New Tuesday, Ahn said.

Kudwa had no interpret on the South Asiatic attacks.

Two polity officials recognized that the Treasury and Secret Service sites were brought down, and said the agencies were employed with their cyberspace assist bourgeois to hold the problem.

Ben Rushlo, administrator of cyberspace technologies at Keynote Systems, titled it a “massive outage” and said problems with the Transportation Department place began Sat and continuing until Monday, patch the FTC place was downbound Sun and Monday.

Keynote Systems is a ambulatory and Web place monitoring consort supported in San Mateo, Calif. The consort publishes accumulation detailing outages on Web sites, including 40 polity sites it watches.

According to Rushlo, the Transportation Web place was “100 proportionality down” for digit days, so that no cyberspace users could intend finished to it. The FTC site, meanwhile, started to become backwards online New Sunday, but modify on weekday cyberspace users ease were unable to intend to the place 70 proportionality of the time.

“This is rattling strange. You don’t wager this,” he said. “Having something 100 proportionality downbound for a 24-hour-plus punctuation is a pretty momentous event.”

He additional that, “The fact that it lasted for so daylong and that it was so momentous in its knowledge to alter the place downbound says something most the site’s knowledge to fend soured (an attack) or most the rigor of the attack.”

Denial of assist attacks against Web sites are not uncommon, and are commonly caused when sites are deluged with cyberspace reciprocation so as to effectively verify them off-line. Mounting much an move crapper be relatively cushy using widely acquirable hacking programs, and they crapper be prefabricated farther more earnest if hackers foul and ingest thousands of computers equal unitedly into “botnets.”

For instance, terminal summer, in the weeks directive up to the struggle between country and Georgia, American polity and joint Web sites began to wager “denial of service” attacks. The citadel denied involvement, but a assemble of autarkical Western machine experts derived field obloquy and Web place entrance accumulation to hold that the Slavonic section and expeditionary info agencies were involved.

Documenting cyber attacks against polity sites is difficult, and depends hard on how agencies remember an incident and how flourishing or bruising it is.

Government officials routinely feature their computers are probed jillions of nowadays a day, with some of those existence scans that don’t causing some problems. In a June report, the congressional Government Accountability Office said federal agencies reportable more than 16,000 threats or incidents terminal year, roughly threesome nowadays the turn in 2007. Most of those participating unlicensed admittance to the system, violations of machine ingest policies or investigations into potentially bruising incidents.

The Homeland Security Department, meanwhile, says there were 5,499 famous breaches of U.S. polity computers in 2008, up from 3,928 the preceding year, and meet 2,172 in 2006.

By LOLITA C. BALDOR