How to enable DOS mitigation on your cPanel account

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Written by Dennis Nind

Last published at: February 8th, 2019

In computing, a denial-of-service attack (DoS attack) is a cyber-attack where the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet. Denial of service is typically accomplished by flooding the targeted machine or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled. In a distributed denial-of-service attack (DDoS attack), the incoming traffic flooding the victim originates from many different sources. This effectively makes it impossible (or, more difficult) to stop the attack simply by blocking a single source. A DoS or DDoS attack is analogous to a group of people crowding the entry door or gate to a shop or business, and not letting legitimate parties enter into the shop or business, disrupting normal operations. Criminal perpetrators of DoS attacks often target sites or services hosted on high-profile web servers such as banks or credit card payment gateways. Revenge, blackmail[2][3][4] and activism[5] can motivate these attacks. If your site is under attack, the team have probably already noticed and will be filtering the traffic to your accounts / sites. However, if you suspect your account is under a DOS attack, please inform us via a support ticket immediately and do the following...

  1. Login to cPanel
  2. Go to 'Nginx Cluster Control' section and select 'CLOUDNS'
  3. Select the domain you wish to enable the protection for from the dropdown list and click 'Configure'
  4. Select 'Application Settings'
  5. Enable the 'xss_filter' option
  6. Click 'Submit'