What Is DDoS And How To Protect Your Website


What is DDoS and how to protect your website - There are many different ways to hack a website, but one of the most common and easiest is a DDoS attack that makes your website unavailable to visitors to interrupt or suspend hosting company services. The web is connected to the Internet. DDoS attacks are distributed attacks of DoS hacks, which usually involve more than one single IP address.

Hackers often target websites or services like banks, credit card payment gateways, but can also be business or personal websites for revenge, extortion and activity.

DDoS attacks are illegal in the United States and other countries, so I recommend against using them! Although you can find and purchase services that will carry out a DDoS attack against someone's website, you should never use that service, moreover, you should pass these websites to the police. local.

Example - What is a DDoS attack?


Anyone can execute a DOS attack, you just need a good computer and internet bandwidth and you can use your browser by typing multiple times on the same website and automatically refreshing with how to use extensions / plugins / extensions every few seconds. Most web servers will have no problems with this small illustrated DoS attack, but if you ask your friends to join then this will be a DDoS and you will use more resources and eventually have The ability to target the website is not available.

Statistics - Who is most targeted?


As mentioned before, DDoS is an illegal activity, but there are people who will attack any website or network you choose for $ 150. I don't know about such services, but some time ago I happened to see some forum posts where people were offering those services. Apparently these websites have been taken down and the government is trying to find the authors of such posts.

China, the United States and Canada were the most targeted web resources in 2015, followed by Russia, Vietnam, South Korea, Germany, France, the Netherlands and Hong Kong in the top 10.

Most attacks are launched on Thursday and they last more than four hours, Linux is used to launch attacks more often than Windows.

See more: Build a Website with WordPress

Symptom - How to determine if your website is under attack?


There is a list of symptoms for DDoS attacks, but it's not very standard because similar symptoms can appear if your web server has hardware or Internet problems:

  • Unusually slow website loading or website features;

  • Website connection not available;

  • The number of emails received is abnormally high;

  • Unusually large number of accounts, posts, threads and other spam activities.

How to protect your website against DDoS attacks?

Even if you only have a personal website, it is better to protect your investment because there are people who launch DDoS attacks for revenge or just to check web server and type of DDoS attack. they use.

There are several ways to avoid your website from DDoS attacks:

  1. Select the appropriate Internet Service Provider (ISP) with the appropriate hardware and have a contractual agreement with your web host. Usually, ISPs offer DDoS mitigation and even if you have more ISPs for your web server, you can maximize uptime and protect your network links.

  2. Having a cloud mitigation provider provides you with DDoS mitigation from a cloud with lots of bandwidth and the ability to minimize and your own data will be securely stored in one or more internet clouds. Cloud mitigation vendors have a team of security engineers and researchers working to protect their customers from DDoS attacks.

  3. Using routers, switches and firewalls, you can stop simple ping attacks and stop invalid IP addresses filtering out unnecessary protocols and they provide automatic speed limits, delayed links, traffic shaping, Bogon filtering and deep packet inspection.

  4. Having a properly configured server application, you can minimize the damage of a DDoS attack, especially if the administrator knows which resources the application can use and also performs updates in real time. in the event of an attack.

  5. Use an Intrusion Detection System (IDS) to detect traffic anomalies, but this is not an automated system and you need to manually enable it.

  6. Buying excess bandwidth can handle various spikes in traffic.

  7. Use an application front-end hardware to analyze data packets and identify common, preferred or dangerous packets.

  8. Using DDS-based defense systems can block DoS attacks based on connection and protocol attacks.

  9. Use the Application-level key completion indicator to indicate whether incoming traffic is legitimate.

  10. Use the blackout process to send all attacks to the null interface.

  11. Use a sinking process to route traffic and reject bad packets.

  12. There is a cleaning center that uses various methods such as proxies, tunnels and circuits that separate legitimate traffic from bad media.

  13. Use IP unicast backlink verification to verify each packet received for DDoS attacks.

  14. Dump logs because your web server logs cannot tell the difference between good traffic and bad traffic and the log files are getting too big.

  15. Capture evidence by using a Linux workstation that can handle packet streams and snoop programs to catch them.

  16. Contact law enforcement and ask them to help you.

There are many software that can help you protect your website from DDoS attacks such as:

  • CloudFlare provides protection against DoS attacks of all types and sizes, support, Anycast for DNS and TCP, absorbing attacks before they overload your server, minimizing applications. volume, uptime, global, distributed networks, automated learning, and legitimate traffic. CloudFlare has protected more than 2 million websites and the largest DDoS attack has stopped at about 600Gbps.

  • DDoS Protector blocks DoS attacks within seconds with multi-layer protection and provides performance up to 40 Gbps. The software also uses new techniques and traditional techniques to block a variety of attacks with advanced challenge techniques, behavioral protection and automatic signature.

  • The FortiWeb application firewall provides a variety of protection policies specific to DoS and DDoS, network and application layer protection, HTTP and HTTPS protection, sophisticated botnet challenges and feedback protection and Geo IP Analysis.

  • Secure64 DNS Author provides reduced DNS DDoS server protection and DNS bandwidth. In addition, the DNS Secure64 Agency can detect high volumes of DDoS attacks that allow you to ensure DNS availability even during an attack, eliminating oversupply and the need for specialized network security equipment. .

  • FortGuard's anti-DDoS firewall provides you with the highest standard of protection against attacks, integrated IPS, SYN protection, arp spoofing, port scanning, SQL SQL and TCP Flooding, capabilities Real-time display of attacks, TCP flow control, packet filtering, IP whitelist and blacklist, proxy management and log records.


All of these ways to protect against DDoS attacks will keep your website running through a DDoS attack if that is the case.

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Nguyen Diep
My name is Nguyen Manh Cuong. I was born in a poor village in Ba Vi district, HA NOI province - windy and sunny land. Currently

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