![]() ![]() Attackers use their DDoS vector(s) of choice, but then distribute them over hundreds or even thousands of destination IP addresses. Otherwise known as ‘spread spectrum’ or ‘subnet’ DDoS attacks, these target a range of addresses or entire subnets, rather than a single IP address. The ACK (or ACK-PUSH) flood exhausts a victim’s firewalls by forcing state-table lookups and servers by depleting their system resources used to match these incoming packets to an existing flow. In an ACK flood attack or ACK-PUSH Flood, attackers send spoofed ACK (or ACK-PUSH) packets at very high packet rates that fail to belong to any current session within the firewall’s state-table and/or server’s connection list. ![]()
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