Cloud Security

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DDoS Attack Protection

With the IoT boom and the increasing trend of smart home appliances which seriously lack in security, new waves of Distributed Denial of Service attacks (DDoS) heavily threaten many websites. Not only banks, organizations, and online shops, but even small personal websites are now facing these attacks frequently. Just imagine a downtime on your website could cost you thousands or millions of dollars!

ArvanCloud easily helps you defend your website and services against DDoS attacks, without any need for you to change your host, your network architecture, or your code. By using advanced Anycast architecture and GSLB technology, ArvanCloud's DDoS Protection system helps you fend off all kinds of DDoS attacks, including DNS server, UDP, TCP, layer 3/4 ICMP, and even advanced layer 7 bots.

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    Network Layer Attacks

    Layer 3,4 attacks are the most common types of DDoS attacks on the Internet. In every quarter, various vulnerabilities are found which give rise to millions of bots. This makes the statistics on attack types vary from time to time, but it is safe to say that %90 of all attacks are done on Network layer.


    SYN Flood

    The SYN Flood method has roots in the structure of TCP protocol which consists of three steps to establish a connection.

    In a SYN Flood attack, the attacker generates a large number of TCP/SYN packets with forged sender addresses and sends them to the victim. The victim machine handles each packet like a real connection request and tries to establish a connection by sending back a SYN-ACK packet. But since the senders are fake, connections remain half-open waiting for a response that never comes. Very soon the system reaches its maximum allowed connections and most of the system's resources are engaged with fake connections, denying service to real users.


    UDP Flood Attack

    In UDP Flood attacks the attacker sends a flood of UDP packets to several random ports. At first, for each port the operating system looks for an application listening to it; but when the it doesn't find any, the OS sends back ICMP Destination Unreachable packets in response; a process which heavily engages system resources.


    Reflected and Amplification Attacks

    In a Reflected attack, the attacker generates a flood of forged packets with the victim’s IP address as the sender, and sends them to a large pool of servers and computers. Then, all these systems reply by sending back packets to the victim’s address. This takes up the victim’s bandwidth and other resources, rendering the service unresponsive.

    In a more advanced type of this model, which is known as Amplification Attack, the hacker sends certain requests that their replies are much larger in size.
    In DNS Amplification method, the replies are as much as 179 times larger than the request packet, and in NTP Amplification method they get as much as 556 times larger, which means a hacker can flood the victim with 556 GB of data using only 1GB himself.
    Since Reflected and Amplification techniques can power up an attack more than 500 times, they were once considered the most dangerous DDoS attacks. But today they make up only about %5 of all these attacks.

    Basic Protection

    ArvanCloud CDN has several PoP sites around the wolrd, which in itself spreads the load of an attack among distant nodes. These PoP sites are powerful nodes and act as the first line of defense, neutralizing small to medium attacks with sheer response power. For stronger attacks, these nodes block the attack load from reaching inside the cloud to your origin servers.

    Application Layer Attacks

    Although Application Layer or L7 attacks compose only about %10 of all attacks, it is considered as one of the most complicated kinds of DDoS attack to mitigate. Just imagine hundreds of thousands of infected devices including home PCs, servers, and even home internet modems lacking secure setup, simultaneously sending requests to a website.
    Most countermeasures for DDoS attacks are ineffective against this type, and the attacked servers or website will go down very easily.

    But ArvanCloud's Cloud Security System protects your business against them very simply. In ArvanCloud’s panel, there are three levels of protection available against L7 attacks:


    Standard Protection

    In this mode, users will not notice any changes on your website’s performance, but the bulk of robots that are unable to set cookies and use it in other connections will stay out.


    Advanced Protection

    If attacking bots turn out to be more advanced, you can enable this mode, which uses a type of encryption method that identifies and filters out bots that try to simulate human behavior. When a user opens your website, for a few moments they'll see a page which verifies them as humans.


    Professional Protection

    Suppose that attacking bots were even stronger than before. Here, we turn to advanced verification which shows a security code or image recognition captcha to the user. Since the this happens outside of your servers, this method stands among the most effective measures against Application Layer DDoS attacks.


    Obsolete Attacks

    Sometimes names such as Smurf, Nuke, Teardrop, Ping of Death, etc. are mentioned as DDoS attack methods. Today, these types of attacks are obsolete or rendered ineffective, and are mostly used against older devices and infrastructure, and are easily neutralized in modern structures. ArvanCloud's Cloud Security scans for and coutnters these types as well.

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    FREE

    • Number of Domains: Unlimited
    • Number of requests: Unlimited

    Personal Website

    FREE

    • Traffic: 20 GB
    • Number of requests: 19,000
    • Number of Purges: 200

    Website with low views

    38,900

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    39,900

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