web site is showing improved performance today after several days of outages and service problems. While the Paypal site is now available, some delays in other services persist.
"A few residual issues are still impacting some users," parent company eBay said in a system notice. "PayPal system-generated emails, such as payment notification emails, password recovery emails, and confirmation emails, may be delayed. We are working to resolve these issues as soon as possible."
Paypal began experiencing performance problems Friday after a redesign and code revision destabilized its site performance. Company press reps have said that while eBay's infrastructure allows site changes to be rolled back, Paypal's does not.
Paypal is powered by an Apache web server on Linux, while eBay runs on Windows Server 2003.
Problems implementing a site redesign temporarily crippled some operations of Paypal
the popular payment processing service. The performance problems, which began after a site update Thursday night, escalated Monday as the Paypal web site became unreachable. The site returned to service early today, but was experiencing intermittent outages again by midday.
The problems limited Paypal's ability to process payments for its parent company, the auction site eBay, as well as thousands of web sites that use Paypal to process online payments. The incident is the latest in a series of outages this month for services that allow web merchants to accept credit cards, several of which have been knocked offline by distributed denial of service (DDoS) attacks.
Paypal's issues appear to be internal, and have had significant impact. "A technical problem with the PayPal platform has caused intermittent errors and availability for members attempting to use the PayPal site since Friday 10/8," eBay said in a notice to members. "Activities such as paying for ended eBay listings, using the Immediate Payment feature, using PayPal shipping functionality, and accessing account information have been intermittently available. Offline use of PayPal debit cards has also been impacted intermittently, and some members have been unable to use them."
Online payment processors continue to come under attack, with the Bank of Scotland's Worldpay
service becoming the latest provider to have its operations disrupted by a distributed denial of service (DDoS) attack.
Worldpay says it has been "adversely affected" by a DDoS that commenced over the weekend, with the service showing some signs of improved performance Tuesday. A dynamically updating performance chart for Worldpay is available here.
Ranking by Failed Requests and Connection time,
September 1st - 30th 2004
During September all of the sites monitored experienced some failed requests, with Energis, New York Internet, Express Technologies and
INetU the most reliable sites during the period.
Outages caused by hurricanes and floods were absent from the list, however
Alabanza experienced a major outage due to an underground fire near its datacenter.
The dominant operating system was Windows, with six of the top most reliable sites running on a Microsoft operating system, evenly split between Windows Server 2003 and Windows 2000.
, 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
Authorize.net "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."
Payment processor Authorize.Net
says it has been fending off intense distributed denial of service (DDoS) attacks which have caused intermittent outages.
"Authorize.net 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.