What is DDoS? And How to Protect From It?

What is DDoS? And How to Protect From It?

What is DDos? The acronym DDoS (denial of service) is a common net-based analogy for what is sometimes referred to as “The Great Burn” or “The Traffic Crunch”. DDoS is used to refer to a unique class of online attacks that attack a network and its customer IP address, and ultimately can bring a system to its knees. DDoS can be likened to a roadblock, where an attacker or attackers jam up a traffic signal that is vital to a larger system.

Most people use the term “Ddos” to describe a kind of online attack that involves the use of traffic manipulation, specifically application-blocking software, and the deliberate slowing down or blocking of a web browser. Application-blocking software is often used by web servers to prevent scripts from loading, or as an alternative to antivirus programs. These programs are typically incorporated within firewalls or other traffic filters, and they are often used as a way to protect websites against hackers.

Basis of Application-Blocking software:

The purpose behind application-blocking software is to prevent a web application from accessing areas of a website that the application needs to perform. This is sometimes achieved with the help of DNS spoofing techniques, where the spoofed IP address of a legitimate internet destination is used instead of the real IP address. For example, suppose you visited this particular web site, but the page actually has this IP, and when you try to go somewhere else on this site it shows a message saying that you’re not authorized to go there. This is the result of a deliberate attack on the web application. This kind of attack can occur within the scope of a content delivery network (CDN), or it can occur on an edge between two geographically dispersed systems.

DDoS Mitigation:

Application-blocking software is also called “Ddos Mitigation”. Basically, it’s the opposite of what was stated above – it is the prevention of “Dos” attacks. Now, if you’re wondering how this could be remotely possible, this is where the term “DDos” comes from. Basically, it’s an attempt to “prevent” the attack from ever happening. A “D dos” program is used to block a web application before it even gets to the point of reaching the user’s computer.

Types of DDoS Protection:

Many companies think that on-premise protection is enough to stop hackers, and that they should not pay the extra cost for a custom web filtering solution. While on-premise traffic blocking is certainly adequate, in some cases companies may find that additional on-premises D of protection is needed. For example, if they find that they have Web filtering issues, but that they don’t need to block all traffic – they simply need to block certain types of traffic. By using an on-premise D of the solution, they are not blocking the types of traffic that they need to stay functional and secure.

On the other hand, many companies feel that they can “iptrace” their network or otherwise gain access to the inner workings of a company’s systems without necessarily needing to employ a custom-D dos protection solution. The problem here is that such “iptrace” techniques often require knowing the precise IP addresses of every piece of hardware or software on the network, something that many businesses do not have. A better solution is to use a feature known as TCPS (TCP Tracing) to determine the exact path through which a particular packet of data is travelling.

Web Application Firewall (WAF):

Another common method of combating Ddos attacks is to implement policies known as “wafs”. These policies are used to limit or to outright ban certain types of on-network traffic. For example, a company may choose to implement a policy that prohibits all ICMP Echo Request (Echo Squelch) traffic, regardless of whether the request is coming from an Echo-able device or not. The purpose of such a policy would be to prevent attackers from using Echo packets to conduct their nefarious activities.

Content Delivery Network (CDN):

Some companies have discovered a way to counter this type of attack: by utilizing what is known as a content delivery network, or CDN. Essentially, a CDN functions exactly like a traditional Internet connection, except that instead of forwarding data packets between end-users on a local area network (LAN), they are forwarding data between Internet-connected computers on a Content Delivery Network. There are a few benefits to a Content Delivery Network: firstly, because the data is not being sent directly to the end-user, this means that there is generally no response time involved, meaning that a Ddos attack is less likely to succeed. Secondly, since the information is delivered through a CDN and is virtually always received within a fraction of a second, there are typically no data loss involved and also very low CPU activity which can help prevent the attack from getting into the server.

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