What does Denial-of-Service Attack (DoS) mean?
A denial-of-service (DoS) is an attack in which the hackers make attempts to prevent legitimate users from accessing the service. Generally, the attacker sends tons of messages asking the server or network to authenticate requests that have invalid return addresses. DoS attacks prevent the server or network from finding the return address of the attacker when sending the authentication approval, thus causing the server to wait before closing the connection. After the connection is closed by the server, the attacker sends more authentication messages containing invalid return addresses. The process of authentication and server wait will thus begin again, keeping the server or network busy.
DoS attack victims very often target web servers of high-profile organizations such as commerce, banking, and media companies, or trade and government organizations. Even though DoS attacks do not generally result in the theft or loss of vital data or other assets, they can actually cost the victim a great deal of both money and time.
Basic types of DoS attacks
A DoS attack can be executed through a number of different ways and the most basic types include:
- Interrupting a service to a specific system or individual
- Disrupting the state of information, such resetting of TCP sessions
- Flooding the network to prevent legitimate network traffic
- Preventing a particular individual from accessing a service
- Interrupting the connections between two machines in order to prevent access to a service
The smurf attack is another variant of the DoS. This attack is carried out via emails with automatic responses. For instance, if someone sends hundreds of email messages containing a fake return email address to hundreds of people in an organization with the help of an autoresponder on in their email, the initially sent messages can actually become thousands sent to the fake email address. If that fake email address belongs to someone, this can go to the extent of overwhelming that person's account.
Given below are a few indicators of a DoS attack:
- Inability to load a specific website such as your web property
- Unexpected loss of connectivity across devices on the same network
- Unusually slow network performance such as long load times for websites or files
Prevent a DoS attack by installing a reliable web security software: Comodo cWatch
Generally, experts recommend a number of strategies that you can use to prevent DoS attacks, starting with setting up an incident response plan well in advance.
An enterprise will have to contact its internet service provider (ISP) if it suspects that a DoS attack is underway. This is essential in order to determine whether the incident is a real DoS attack or degradation of performance brought about by some other factor. The ISP is capable of helping with DoS mitigation by rerouting or strangling malicious traffic and using load balancers to lower the effect of the DoS attack.
Comodo has developed cWatch in order to simplify all of those complicated steps involved in DoS prevention. This web security package is a Managed Security Service for websites and applications that incorporate a Web Application Firewall (WAF) provisioned over a Secure Content Delivery Network (CDN). cWatch is a completely managed solution from a 24/7 staffed Cyber Security Operation Center (CSOC) of specialized security analysts and is powered by a Security Information and Event
Management (SIEM) that can leverage data from more than 85 million endpoints in order to detect and mitigate threats even before they occur.
The cWatch WAF is capable of eliminating application vulnerabilities and protecting web applications and websites against advanced attacks including such as Denial-of-Service (DoS), Cross-Site Scripting, and SQL Injection. Combined with malware scanning, vulnerability scanning and automatic virtual patching and hardening engines, the Comodo WAF that is offered to you through cWatch provides robust security that is wholly managed for customers as part of the Comodo cWatch Web solution.
Removal
Security stack layer 1
Malware Detect & Removal
Our malware detection scanning, preventive methods and removal enables you to take a proactive approach to protect the business and brand reputation from malware attacks and infections.
- Unsuspecting websites get infected with malicious code.
- Continuous website monitoring to detect any incidents.
- Identify and remediate the cause to hardening your websites.
Comodo cWatch Web can identify malware, provide the tools and methods to remove it, and help to prevent future malware attacks at the edge before it hits the network, included as a paid member.
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Response
Security stack layer 5
Cyber Security Operations Center
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- 24 / 7 / 365 security monitoring using state-of-the-art tech.
- Engage clients of complex threats to resolve the issue.
- Real-time web traffic monitoring and proactive incident fixes.
C.S.O.C. checks for threats, identifies and analysis then performs the necessary actions to resolve the issue while offloading costs of in-house experts by using stack layer 3 to handle the heavy lifting.
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Intelligence
Security stack layer 3
Security Information • Event Management
S.I.E.M. collects logs and events the network traffic and web assets, security devices, operating systems, applications, databases, and reviews the vulnerabilities using artificial intelligence to process.
- Reduces billions of events into prioritized threats real-time.
- Identifies changes in network behavior with activity baselines.
- Flows data searches in real-time streaming or historical mode.
S.I.E.M. senses and tracks significant threats to links to all online supporting data and context for easier investigation. While anomaly detection to identify changes associated with the network safety.
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Prevention
Security stack layer 4
Web Application Firewall
W.A.F. by Comodo eliminates application vulnerabilities to protect websites and web applications against advanced attacks including Denial-of-Service (DDoS), SQL Injection and Cross-Site Scripting.
- Destroys malicious requests and thwart hack attempts.
- Protection to account registration forms and login pages.
- Malicious bots and brute force attacks are block and patched.
Combined with malware scanning, vulnerability scanning and automatic virtual patching and hardening engines provides robust security is fully managed for Comodo cWatch Web customers.
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Performance
Security stack layer 2
Add a network of globally distributed servers designed to boost the speed for websites and web applications by transferring content to your user based on their proximity to the nearest CDN web server.
- Proven to increase search engine rankings and site scores.
- 29 worldwide CDN node locations to reach your users.
- Save your bandwidth by leveraging CDN browser caching.
CDN serves your users your website content with virtually unlimited capacity. Giving you the freedom to focus less on site maintenance, more on scaling the uptime of your traffic and target audience.
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Compliance
Security stack layer 6
Payment Card Industry • Data Security Standard
PCI • DSS ensures that your customers' cardholder info is kept secure from security breaches through a meticulous scan of your network and applications to identify and fix security vulnerabilities.
- Simple and automated way to stay compliant with PCI • DSS.
- Pass the requirements for the 12 points PCI • DSS standard.
- Schedule on-demand PCI scans to report quarterly results.
Establishes and implements a firewall, hardens your environment, disables unnecessary services & configures system parameters to prevent misuse, ensures system audit components are protected.
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