Says New Defenses Stymie DDoS Attack, which handles credit card transactions for online merchants, says new defensive measures have helped deflect a persistent distributed denial of service (DDoS) attack that caused sporadic outages last week. "successfully installed industry leading solutions designed to negate the impact of (DDoS) attacks," the company said over the weekend. "These installations are successfully thwarting a current and sustained attack with no DDoS-related degradation to our service whatsoever." Site Performance

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DDoS Attacks Target

Payment processor Authorize.Net says it has been fending off intense distributed denial of service (DDoS) attacks which have caused intermittent outages.

" continues to experience a series of large scale distributed denial of service (DDoS) attacks," the company said in a statement on its web site, calling the attacks "unprecedented in their severity and tenacity." The company said the attacks have caused periodic outages for merchants using its service to process credit card payments. Some customers were able to process transactions from existing accounts, but were unable to sign up new accounts.

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Baltimore Fire Knocks Alabanza Offline

Thousands of web sites hosted at Alabanza are offline today after power was turned off at its Baltimore, Md. data center facility because of an underground fire nearby.

Alabanza hosts more than 188,000 hostnames, and specializes in the reseller hosting market. Its customers include 30 companies hosting 1,000 hostnames or more, including Apollo Hosting (13K) and ChristianWebHost (12K).

Alabanza Site Performance

A dynamically updating graph is available here.

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Ivan Causes Downtime, Damage at Data Centers

Hurricane Ivan took a toll on data centers as it stormed up the East Coast of the U.S. last week, doing major damage to a facility near Washington, D.C. and also disrupting the operations of the U.S. government's retirement savings system. Ivan, one of the most powerful Atlantic hurricanes in recent years, also did extensive damage to Internet connectivity during its deadly march through the Caribbean.

On Friday night, a tornado spawned by the remnants of Ivan ripped the roof off a data center in Ashburn, Va. that housed the beta site of the online game World of Warcraft, which posted pictures of the damage. Water leaked onto the servers, forcing a shutdown of the system, which was still down early Monday. WoW recently announced a deal to host the site with AT&T, which has a data center in Ashburn's Beaumont Corporate Park.

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Latest MyDoom DDoS Targets Symantec

MyDoom.W, a new version of the infamous Internet worm, instructs infected computers to launch a distributed denial of service (DDoS) attack on Symantec, a leading vendor of antivirus software. Earlier versions of MyDoom orchestrated DDoS attacks that knocked out the web sites of The SCO Group and the Recording Industry Association of America (RIAA). Similar attacks on Microsoft have been unsuccessful.

MyDoom.W is lightly circulated at present, and has had no visible effect on Symantec's operations. According to Symantec, the worm programs infected machines to send a GET request to on port 80 every 300ms from now through Oct. 1. Other antivirus firms say the attack is not scheduled to begin until Sept. 29. The antivirus vendors can't seem to agree on a name, either, as the worm is also identified as MyDoom.X and MyDoom.Y by various providers.

If the author's intent is to interfere with Symantec's ability to distribute virus definition updates to customers, he/she is using the wrong URL, as is the company's main business web site. Virus updates are distributed via, which uses Akamai's content distribution network to speed downloads and defend against DDoS attacks.

Most Reliable Hosting Providers during August

Ranking by Failed Requests and Connection time,
August 1st - 31st 2004

Hoster Performance August04

During August all of the hosters monitored experienced some failed requests, with iPowerWeb, Italian hoster SeeWeb and Rackspace the most reliable sites during the period.

For the first time, Linux is the dominant operating system, with five of the top ten running their sites on a Linux distribution.

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