A Beginner’s Guide to DDoS Attack and Protection

A Beginner’s Guide to DDoS: Mechanics, Attack Types, and Protection

In the current Australian cyber threat landscape, availability is just as important as confidentiality. While data breaches make headlines, Distributed Denial of Service (DoS) attacks can silently cripple a business, costing thousands of dollars in lost revenue per minute.

For IT managers and business owners, the question isn't just "what is it?"—it is effectively asking, "how do you DDoS proof a network?" To answer that, we must first understand the mechanics of the attack itself.

What is a DDoS Attack?

A Distributed Denial of Service (DDoS) attack is a malicious attempt to disrupt the normal traffic of a targeted server, service, or network by overwhelming the target or its surrounding infrastructure with a flood of Internet traffic.

Think of it like a physical shop entrance. If one person stands in the doorway (a standard DoS attack), security can easily remove them. But if a large number of people crowd the door simultaneously, blocking legitimate customers from entering, the shop effectively ceases to function.

In the digital world, the goal is to send so much "junk" traffic that the server cannot process legitimate traffic, causing the site to slow to a crawl or crash completely.

The Mechanics: How Do You DDoS a Modern Network?

When people search for "ddos attack how to" or "how to dos," they are usually trying to understand the architecture behind these massive assaults.

A standard DoS attack typically comes from a single source. However, a DDoS attack relies on a network of compromised machines, known as a botnet.

1. Recruitment: Attackers infect thousands of vulnerable computers, servers, and increasingly, IoT devices (like smart cameras and routers) with malware.

2. Command and Control (C2): The attacker controls these infected devices remotely.

3. The Attack: The attacker sends a command to the botnet. Suddenly, thousands (or millions) of devices send a request to the attack targets simultaneously.

Because the traffic comes from legitimate devices distributed across the globe, distinguishing the bad traffic from the good is incredibly difficult.

Common Types of DDoS Attacks

Not all attacks are the same. Understanding the types of attack is critical for selecting the right DDoS protection. They generally fall into three categories:

1. Volumetric Attacks

These are the most common. The goal is to consume the bandwidth of the target site.

• UDP Floods: Attackers send vast amounts of UDP packets to random ports on the host. The host checks for the application listening at that port, finds none, and replies with an "ICMP Destination Unreachable" packet, exhausting its resources.

• DNS Amplification: This effectively explains "how to dos" with efficiency. The attacker sends a small request to a third-party server with a spoofed IP address (the victim's IP). The server sends a massive response to the victim, amplifying the traffic volume significantly.

2. Protocol Attacks (State-Exhaustion)

These attacks target the connection state tables in firewalls and load balancers.

• SYN Flood: The attacker sends a succession of SYN requests (the first part of a TCP handshake) in an attempt to consume enough server resources to make the system unresponsive to legitimate traffic.

3. Application Layer Attacks (Layer 7)

These are the most insidious. They don't target bandwidth; they target the web server itself.

• HTTP Floods: The attacker sends what looks like legitimate HTTP requests (e.g., "GET /index.html" or "POST /login"). Because generating the page requires processing power from the server and database, a large number of these requests can crash the database, even with low bandwidth usage.

The Motivation: Why Attackers Do It

Why would someone expend resources to crash your site?

• Extortion: This is rising in Australia. Attackers demonstrate a small attack, then demand a ransom to stop a larger one.

• Smoke-Screening: Attackers use DDoS to distract your security team while they perform a more subtle data breach or injection attack elsewhere.

• Business Competition: Unscrupulous competitors may hire "DDoS-for-hire" services to take your site offline during peak sales periods.

Protection Strategies: How to Defend Your Infrastructure

To mitigate these threats, relying on a simple firewall is no longer enough. You need a multi-layered strategy.

Rate Limiting

Rate limiting restricts the number of network traffic requests a user can make within a specific timeframe. While this helps against simple scripting attacks, it often fails against complex botnets that rotate IP addresses.

Web Application Firewalls (WAFs)

Web Application Firewalls WAFs are essential for stopping application layer attacks. A WAF sits between the internet and your server, inspecting traffic for malicious patterns (like SQL injection or known bot signatures) and blocking them before they reach your database.

Traffic Scrubbing and Cloud Mitigation

For volumetric attacks, on-premise hardware often fails because the pipe simply fills up. Cloud-based DDoS protection services act as a massive filter. They accept all traffic meant for your website, "scrub" the bad requests at their massive data centers, and send only the legitimate traffic to your server.

Understanding "how to dos" or the mechanics of a botnet isn't about learning to hack—it's about learning to survive. As IoT devices proliferate, the scale of distributed denial of service dos attacks will only grow.

Organizations must move beyond reactive measures. You need to baseline your traffic, implement robust WAFs, and regularly stress-test your environment to ensure your defenses actually work when the flood arrives.

Is your infrastructure resilient enough to withstand a DDoS attack? Don't wait for your server to crash to find out. Contact Lean Security today to discuss our stress-testing and web application security services.

9 Things Everyone Should Know about Website Security Scans and Why They are a Must for All Serious Webmaster

Website security is a major concern of many website owners all over the world these days. It is not important to know and identify the framework used but you have to still maintain the web application including the server so as to avoid intrusions. Identity thieves and hackers may attack your site in order to get access to your confidential data and files plus to be able to use the server to send abused mails as well as to host a malicious file. In order to prevent such attacks, you have to keep in mind the following things associated with web security scan:

Things You Have to Keep in Mind about Website Security Scan

1. Keep the framework and software updated. Every software development companies repair security bugs in the updated editions of their products so it is a must to check the version of your framework and software then download the recently upgraded version. This way, you will be making your site more secure and safer from attacks online. Usually, hackers make use of the security holes in websites to carry out some malicious activities that can do a significant effect over your site.
2. Make use of impossible to detect, strong and unique passwords. It is always important to make use of strong passwords for the cPanel, FTP accounts and on the email accounts so as to prevent the security breaches. You must make use of small letters, special characters, capital letters and numbers in creating a brand new password to make it strong and impossible to guess for intruders.
3. Always filter JavaScript and HTML. The XSS or Cross Site Scripting is the most typical method that is utilized when it comes to intrusion. The intruders may insert the scripting code in the web forms or they may use JavaScript in running a malicious code. To guarantee security, you have to check the data that has been submitted and then eliminate those unimportant HTML tags.
4. Display the error messages with caution. When the internet users enter wrong login details, there will be a simple error notification that will be displayed on your site. On the other hand, you need to be extra careful when writing a reply for that message. Hackers usually make use of instinctive force attack strategy so that they can get your password and username. Instead of making users aware that they only have to mind the password or the username, you can say that either of them is incorrect. You can also make use of Captcha to add more security for your website.
5. Use client-side and server-side validation. When it comes to preventing any malicious data from being added, you have to make use of both the server-side and the client-side validation.
6. Look at the uploaded files. When your website offers a section where people can upload files, you have to be careful about those files uploaded to your site. Hackers might also upload an infected file to your server in order to run a malicious code.
7. Choose a website security scanner tool from a reliable vendor online.
8. Avoid using free tools online. They might be ineffective.
9. Remember to keep your website security scanner updated. Automatic updates should be enabled for your convenience.

Businesses and webmasters should consider the importance of having an efficient website security scanner to know how vulnerable their websites to hacking and phishing. Consider getting one for your site too today.

7 Simple Steps to Protect Your Website from Most Common Cyber Threats

Your web browser has been attacked. Apart from just tricking you in downloading and installing some malicious software programs, attackers primarily target the flaws present within the browser that you use up to the plugins of it so as to compromise your personal computer. Here are 7 simple steps that you can take so as to protect your website from the most common threats and attacks online:

1. Keeping your web browser up to date. Make use of a new and updated web browser and keep it automatically updated. Never use an out of date web browser such as Apple’s Safari for Windows and any previous editions of Microsoft’s IE. The best browsers that you can use are Google Chrome and Mozilla Firefox.
2. Enabling the click-to-play plugins. It will improve the loading of the web pages and it helps you save battery power and CPU cycles. It also comes with some necessary security advantages. With this, attackers will not be able to use the flaws present in the browser you are using including the plugins in the background.
3. Uninstall the unneeded plugins. There can be many plugins that you do not use. You may uninstall them to keep your website safer.
4. Keep your plugins up to date as well. Any plugin that you always use should be kept updated as well just like your web browser. All you need to do is to let their automatic updates feature enabled to keep them updated every now and then.
5. Make use of a 64-bit internet browser. A 64-bit program typically comes with a greater protection from attacks. You must make use of a 64-bit internet browser, thinking that you use a 64-bit edition of Windows. The ASLR or Address Space Layout Randomization becomes more effective if it is used together with a 64-bit program. Google Chrome is available in 32-bit as well as 64-bit version. On the other hand, there is a great chance that you still make use of the 32-bit version that was previously installed on your device. You have to check and find out whether you are using a 32-bit or 64-bit version of Google Chrome. If you learned that you are still using the previous version then you should replace it with the 64-bit version. Stable 64-bit version for Firefox is not yet available but you can make use of the developer builds. Mozilla is planning to make a 64-bit version of Firefox that will be made available through the steady network in Firefox 41.
6. Run a program that is against exploitation. An anti-exploit program is something that you can use in order to harden your internet browser against a few of the most typical kinds of attacks. Instead of relying on the antivirus-style blacklist of a specific behavior or software, such kind of program will just prevent some forms of unusual behavior to take place.
7. Beware when using a browser extension. A browser extension is awesome and it is a powerful tool that you can use to customize the web as well as your browser. Also, it is potentially harmful. There are some extensions out there that can insert an advertisement to web pages that you use and perform any other nasty things that you do not want. You may choose to use just some browser extensions only and pick those that will help making your browser run better.

Securing the software of your browse is just a part of this. It is also necessary to avoid those phishing sites or nasty software. Many websites out there attempt to fool you and download viruses or malware instead of the software program that you need.

5 Little-Known Facts That Can Affect Web Application Security

Business applications that hold sensitive information related to business processes and customers are prone to malicious hackers and viruses. Incorporating cost-effective security measures is a must in order to protect this important information and prevent data stealing attacks. If businesses fail to take the necessary web security test measures, they will lose the trust of customers and experience significant losses.

Hackers can use various methods to breach security such as denial of service, SQL injection, cross site scripting and buffer overflow. Vulnerabilities are often used during attacks because it’s easier for hackers to take advantage of these weak aspects. Here are 5 little-known facts that can affect web application security.

1.       99 percent of computers have Adobe Flash, Adobe Reader or Oracle Flash, making them susceptible to exploit kits due to the high level of vulnerabilities present in these types of software. It only takes one click on an infected ad banner to provide a hacker with complete access to the computer. Keeping the software updated or installing a solution that automatically updates the software can be done to protect your computer and sensitive information.

2.       Hackers love social media. People spend a lot of time on social networking sites and tend to click links posted by their friends. Hackers take advantage of this fact.  Some of the most common attacks directed at social media sites are phishing where the hacker tries to get sensitive information such as passwords, credit card info and usernames by posing as a trustworthy entity in a Tweet or Facebook post and social spam that can appear in various forms like malicious links, bulk messages, false reviews and fake friends.

3.       Social engineering is the psychological manipulation of a person into revealing sensitive information or doing actions. It is the favorite way of cyber attackers to manipulate victims and gather information, gain access to systems and commit fraud. Don’t give away sensitive data to strangers or click any malicious links. 

4.       Governments are creating malware and using it in espionage programs or as digital weapons. The malware created by the government makes you more vulnerable to security attacks as it speeds up the development of criminal malware. Cyber attackers do a lot of reverse engineering on malware created by the government and use its technical approach and tactics to develop their own malware. Governments are also trying to restrain people’s right to encrypt sensitive data for the sake of protection against terrorists and cyber criminals. Cyber policies, however, do more harm than good. Learning more about cyber security and keeping tabs on the latest news in the industry is one way of protecting yourself. You can also install an AV solution and a corresponding solution that can boost your protection against security threats and attacks.

5.       Hacktivism is the mutinous use of computer networks and computers to endorse a political agenda. Its ends are often associated with human rights or free speech. The term may have a positive note, but it actually depends on the one using it. Hacktivism can be a vague anti-systemic movement or a politically driven technology hack. It can indicate anti-spam activists or political protest and is the main factor that drives cyber-attacks.

A web security test can confirm if the security processes in the organization comply with the rules and are efficient enough to fight attacks. It ensures that the vulnerabilities are exposed so that these weak aspects are addressed efficiently and accordingly. Web security testing can expose vulnerability to URL redirection, installation path disclosure, cookie manipulation, PHP code injection, file inclusion, SQL injection, Net exception, command execution and script language error. This process helps organizations ensure that their critical processes and sensitive information are safe from malicious hackers and viruses.

What You Need to Know About Web Application Security

Web applications being used at enterprises that hold valuable and sensitive data and information related to the business’ consumers are normally at a higher risk from hackers and malicious viruses. So as to guard this sensitive data, businesses must integrate cost effective web application security measures. In a nutshell, companies should consider acquire services of a reliable managed web applications security provider that provides extensive security.

When viruses or hackers attack web applications, they can end up causing devastating disruptions that are not only costly but also severely affect the operations of the business. When web applications security test measures are taken regularly and properly, enterprises can end up getting affected severely. As a result, not only do these companies fail to earn the trust of their consumers but they also end up experiencing irreversible loss.

The most ordinary and widespread state for an enterprise is vulnerability. It frequently needs patches to appropriately administer web application security so as to save the standard operations from being disturbed; enterprises need to utilize efficient patch management. It definitely is a difficult operation and necessitates the services of an expert IT team that can easily manage the operation of patches that are vital. Apart from of the patching process’ competence, defense from probable attacks cannot be pledged.

There are several techniques that hackers use for instance, SQL injection, buffer overflow, cross site scripting, and denial of service. These vulnerabilities are employed more than the configuration problems during the attacks. The reason for this is that, it is generally easier for hackers to make use of vulnerabilities since the process of patching is not efficient. Nevertheless, a very effective way of countering this problem is by acquiring managed web application security services.

Web security tests basically find out if or not the security processes in an enterprise are in conformity with the regulations and are competent enough to act in response to the attacks. The online system on the other hand ensures that all the vulnerabilities are positioned with respect to the point of view of the hacker so that the problems and issues are resolved accordingly in an efficient manner.

At Lean Security, our experienced security consultants carry out high-level security assessment of our clients’ web applications, highlighting all the security issues and providing our customers with pertinent guidance and support to ensure that their data is secure.