Through last night Practical Performance Analyst has been subjected to continued Denial Of Service attacks. Fortunately we’ve been able to identify the source of the attack and work with the hosting providers to address the issue. For those who are unaware of what a DOS or Denial Of Service attack is, here’s how Wikipedia defines a Denial Of Service Attack or DOS in short.
A DOS is defined as follows: In computing, a denial-of-service (DoS) or distributed denial-of-service (DDoS) attack is an attempt to make a machine or network resource unavailable to its intended users. A DoS attack generally consists of efforts to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet.
As clarification, distributed denial-of-service attacks are sent by two or more people, or bots, and denial-of-service attacks are sent by one person or system. Perpetrators of DoS attacks typically target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers. Denial-of-service threats are also common in business, and are sometimes responsible for website attacks.
To read more about a DoS please head to Wikipedia.
The DOS attack we witnessed last night looked like custom written bots scraping and downloading content from all across Practical Performance Analyst including the other websites that are linked to from Practical Performance Analyst. The rate of requests we received impacted our ability to respond to other legitimate traffic. We request those readers who would like to gain an understanding of the relevant concepts to come as frequently to Practical Performance Analyst, read through the relevant content and help us improve the quality of content part of the SPE (Systems Performance Engineering) Body Of Knowledge here at Practical Performance Analyst.
We are a small volunteer run effort and pay for all the hosting charges/bandwidth ourselves. DOS attacks like the above impact not just the maintainers of the website but all those readers and users out there. Downtime impacts all the users/readers out there who use Practical Performance Analyst on a daily basis to refer to relevant SPE (Systems Performance Engineering) fundamentals.
We humbly request you to not conduct yourself in such a manner that causes us financial grief and impacts the ability of the community to access the information hosted at Practical Performance Analyst. If you have any concerns, questions of input please write to me at trevor at practical performance analyst dot com.