Ddos protection hosting

What is DDos Attack?

A Denial of Service attack (DoS) or Distributed Denial of Service attack (DDoS) aims at rendering a computer resource either unavailable or with sufficiently crippled user accessibility. There are different techniques and means to launch such attacks. Motives could also be very varied, as well as the targets. DDoS attacks usually represent the organized attempts to make a web site or service not function or cause sufficient downtime for a limited time or permanently.

Typical targets of DoS attacks include all kinds of (prominent or not so prominent) sites or services such as financial and banking institutions, online e-commerce establishments, news & media sites, online gaming communities, the public sector, and lately, even entire countries.

Type of Ddos

There are four primary types of DDoS attacks that provide the foundation for numerous variations and combinations. Below is a brief description of what they are and how they affect site/server accessibility.

SYN flood - numerous TCP connection requests (SYN packets, the first packet of the three-way handshake) are sent to a machine at such a rate that it cannot cope to process all of them. Often, these packets are sent with randomly-generated spoofed source IP addresses. The server responds to SYN request by sending a SYN-ACK trying to establish a valid connection, then waits for confirmation (ACK) for some time, yet such confirmation never arrives. Thus, the connection table of the server fills up and as it does, all new connections are dropped and legitimate users are effectively cut off from accessing the server.

Connection flood is an attack that creates a vast number of empty connections to the targeted server. Only packets establishing the three-way handshake (SYN, SYN-ACK, ACK) are sent with no data transfer, the server starts waiting, within keepalive TCP parameters if such are set at all, for data that never comes through. As the name suggests, the aim is to create a large number of real connections, coming from real IP's, eating into the backlog connection capacity of targeted web servers.

UDP flood is mostly aimed at bandwidth depletion. A large number of big (up to 35Kb) packets are being sent, often with spoofed source IP addresses to a targeted host through the stateless computer networking protocol UDP. In order to intensify bandwidth abuse, sometimes packets are sent to random ports on the host, thus increasing return ICMP rates, in which case the victim server usually replies with an ICMP Destination Unreachable packet after checking for application listening at the respective port and finding none. Connection bandwidth is depleted, rendering the server unreachable by real clients.

HTTP flood aims to bring down a machine through en masse addressing of a single or multiple URLs within a domain, thus causing a webserver overload and as a result - hardware resource depletion. HTTP Flood attacks sometimes lead to physical destruction of server hardware, due to its inability to cope with the overload on CPU and RAM. Rather than going after static content, attackers prefer to target dynamic content in order to amplify hardware load. As the server gets busy with the attack requests, it cuts off or considerably slows down "good" traffic generated by legitimate users.

If you own a Business website with Higher Visitors and If you are under DDoS attack, DDoS Protected Hosting Packages are for you. You can choose any of our DDoS Protected Hosting service to make your website live against any DDoS attack. 

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