Anti-DDoS FilterOur filter solution - explained

Anti-DDoS

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  • Types of attacks

    There are three ways of making your site, server or infrastructure unavailable:

    Bandwidth

    This type of attack consists of saturating the server's network capacity, rendering it unreachable.

    Resources

    This type of attack consists of depleting the machine's system resources, which prevents it from responding to legitimate requests.

    Exploitation

    Also called "exploit", this type of attack targets a particular software fault either to make the machine unavailable or to take control of it.

    Name of attack OSI Type Explanation of attack
    ICMP Echo Request Flood L3 Resource Also called Ping Flood, mass sending of packets including the response of the victim, which has the same content as the original packet
    IP Packet Fragment Attack L3 Resource Sending of IP packets that voluntarily reference other packets that will never be sent, which saturates the victims memory
    SMURF L3 Bandwidth ICMP broadcast attack usurping the source address to redirect multiple responses to the victim
    GMP Flood L3 Resource Mass sending of IGMP packets (multi-cast management protocol)
    Ping of Death L3 Exploit Sending of ICMP packets which exploit an implementation bug in certain operating systems
    TCP SYN Flood L4 Resource Mass sending of TCP connections requests
    TCP Spoofed SYN Flood L4 Resource Mass sending of TCP connections requests to usurp the source address
    TCP SYN ACK Reflection Flood L4 Bandwidth Mass sending of TCP connections requests to a large number of machines, usurping the victim's source address. The bandwidth of the victim will be saturated by the responses to these requests.
    TCP ACK Flood L4 Resource Mass sending of TCP segment delivery receipts
    TCP Fragmented Attack L4 Resource Sending of TCP segments that voluntarily reference other segments that will never be sent, which saturates the victim's memory
    UDP Flood L4 Bandwidth Mass sending of UDP packets (not requiring a previously-established connection)
    UDP Fragment Flood L4 Resource Sending of UDP datagrams that voluntarily reference other datagrams that will never be sent, which saturates the victim's memory
    Distributed DNS Amplification Attack L7 Bandwidth Mass sending of DNS requests usurping the source address of the victim, to a large number of legitimate servers. As the response is more voluminous than the question, an amplification of the attack follows
    DNS Flood L7 Resource Attack of a DNS server by mass sending of requests
    HTTP(S) GET/POST Flood L7 Resource Attack of a web server by mass sending of requests
    DDoS DNS L7 Resource Attack of a DNS server by mass sending of requests from a large set of machines which are under the attacker's control

    Source: OVH.com

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