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Diagram of a DDoS attack. Note how multiple computers are attacking a single computer. In computing, a denial-of-service attack (DoS attack) is a cyberattack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting or overloading services of a host connected to a network.
DDoS mitigation is a set of network management techniques and/or tools for resisting or mitigating the impact of distributed denial-of-service (DDoS) attacks on networks attached to the Internet by protecting the target and relay networks.
Fail2Ban can perform multiple actions whenever an abusive IP address is detected: [7] update Netfilter/iptables or PF firewall rules, TCP Wrapper's hosts.deny table, to reject an abuser's IP address; email notifications; or any user-defined action that can be carried out by a Python script.
Low Orbit Ion Cannon (LOIC) is an open-source network stress testing and denial-of-service attack application written in C#.LOIC was initially developed by Praetox Technologies, however it was later released into the public domain [2] and is currently available on several open-source platforms.
Port knocking is a flexible, customisable system add-in. If the administrator chooses to link a knock sequence to an activity such as running a shell script, other changes such as implementing additional firewall rules to open ports for specific IP addresses can easily be incorporated into the script. Simultaneous sessions are easily accommodated.
Slowloris is a type of denial of service attack tool which allows a single machine to take down another machine's web server with minimal bandwidth and side effects on unrelated services and ports.
Incapsula was founded in 2009 by Gur Shatz and Marc Gaffan. [5] [better source needed] The company has its origins in Imperva (NYSE:IMPV), an American-based cyber security firm which at the time owned 85% of Incapsula. [2]
PeerGuardian is a free and open source program developed by Phoenix Labs (software).It is capable of blocking incoming and outgoing connections based on IP blacklists.The aim of its use was to block peers on the same torrent download from any visibility of your own peer connection using IP lists.