Fragmented ACK Attack

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A Fragmented ACK attack is a variation of the ACK & PSH-ACK Flood that uses 1500-byte packets with the goal of hogging the target network’s bandwidth with only a moderate packet rate. If application level filters were applied on network equipment (routers and such), it will have to reassemble the packets, consuming much of its resources. If no filters were applied, these attack packets will be able to pass through many network security devices such as routers, ACLs, and firewalls undetected. These fragmented packets usually contain junk data, as the goal of the attacker is to simply consume all of the target network’s bandwidth.