How to Prevent and Stop Denial of Service (DoS) Attacks
Attackers with malicious intent block users from accessing a service through denial-of-service (DoS). This can be done by targeting the network and computers of the website you are trying to access, or your computer and the network connection. An attacker can block you from accessing any of your email or online accounts.
An attacker sends a flood of unnecessary requests to the website’s main server, which overloads it. This then blocks any future requests until the site has enough capacity. You are automatically made a victim by this attacker who refuses to accept legitimate requests.
Types of DoS attacks:
- Syn flooding:
These attacks involve multiple attackers attacking zombies simultaneously flooding the target with many SYN packets. The SYN requests will overwhelm the target, causing it to either go down or drastically reduce its performance.
- Fragmentation attacks:
Fragmentation attacks can be a problem type of DoS attack this hinders the target’s ability to reassemble itself. The target is sent several fragmented packages, which he or she finds difficult to reassemble, thus denying access to valid clients.
- Volumetric attacks
These attacks consume all bandwidth on a network and prevent authorized clients from accessing it. This is done by flooding network devices such as switches or hubs with many ICMP echo requests/reply packets. The entire bandwidth is then consumed and clients cannot connect to the target network.
- TCP-State exhaustion attack:
this does attackThis happens when an attacker sets up and destroys TCP connections and overwhelms stable tables.
This attack involves causing permanent damage to the system hardware and sending fake updates to it, rendering them unusable. The only way out is to reinstall the hardware.
- Application Layer Attacks
This is what an attacker doesDoS attacks by taking advantage of programming errors in the app. To do this, the target sends several requests to it to exhaust its resources and prevent it from servicing valid clients. Buffer overflow attacks can result in a programming error. If the allocated memory to a variable’s variable is less than what was requested, it can cause the application to crash or memory leakage.
DoS Attack Prevention
DoS attacks can’t be predicted. DoS attacks can’t be prevented. There are not many ways to avoid being affected by DoS attacks. However, there are some things you can do to reduce your chances of being part of an attack that could use your computer to attack another. These are the most important features that will increase your chances of winning.
- The configuration of servers can reduce the chance of being attacked. You can help reduce the likelihood of being attacked if you are a network administrator for a company.
- Third-party services offer guidance and protection from DoS attacks. These services can be costly but they are also very effective.
- If you haven’t already, install a firewall or an antivirus program on your network. This will limit bandwidth usage to authenticated users.
DoS attacks generally target high-profile companies such as financial and bank sector companies, trade and business stubs, and other large organizations. These organizations should be aware of DoS attacks, and keep an eye on their shoulders to avoid any possible attacks. Although these attacks don’t directly involve the theft of confidential information it can cost victims significant time and money to fix the problem.
Stop DoS Attacks Using Comodo
Installing cWatch, a Comodo web security tool can help you get a strong firewall and an antivirus program. One of the most important features in cWatch is the Comodo WAF. This WAF that plays a major role in stopping DoS attacks is capable of eliminating application vulnerabilities and protecting web applications and websites against advanced attacks including Denial-of-Service (DDoS), Cross-Site Scripting, and SQL Injection. The Comodo WAF is integrated with vulnerability scanning and malware scanning and automatic virtual patches and hardening engines. It provides strong security that can be fully managed by customers as part of the Comodo cWatch Web Solution.
These features are available in the Comodo WAF:
- DDoS protection
Anycast network that is globally distributed allows efficient traffic distribution. It blocks traffic that is not HTTP/HTTPS-based. The current network capacity exceeds 1 TB/s. Each PoP is composed of multiple 10G or 100G ports that are designed to scale up and absorb large attacks.
- Prevention of malicious bots and brute force
This WAF prevents malicious bots from launching brute force attacks on websites. It protects account registration forms as well as login pages against various attack vectors, including reconnaissance, application DoS, and web scraping attacks.
- Hacks and attacks on websites must be stopped
Protect vulnerable websites by detecting and eliminating malicious requests, and stop hacking attempts. It also targets application targeting attacks such as Drupal, Joomla WordPress, WordPress, and plugins.
- Zero-day immediate response
All websites under management receive regular updates of virtual patches. When zero-day attacks become public, the WAF provides an immediate response to help you apply the patch.
Other features of cWatch include:
- Cyber Security Operations Center (CSOC). An entire team of certified cybersecurity professionals is available round the clock to provide surveillance and remediation services.
- Security Information and Event Management (SIEM).Advanced intelligence that leverages current events and data from over 85M+ endpoints, and more than 100M+ domains
- PCI ScanningAllows merchants and service providers to remain in compliance with PCI-DSS
- Secure Content Delivery Network (CDN): To improve the performance of web applications and websites, a global network of distributed servers is used
- Malware Monitoring and Resolution: It detects malware and provides tools and methods to remove it.