SYN flood A SYN flood occurs when a host sends a flood of TCP/SYN packets, often with a forged sender address. Each of these packets is handled like a connection request, causing the server to spawn a half-open connection, send back a TCP/SYN-ACK packet, and wait for a packet in response from the sender address. However, because the sender's address is forged, the response never comes. These half-open connections exhaust the available connections the server can make, keeping it from responding to legitimate requests until after the attack ends.
SYN flood A SYN flood occurs when a host sends a flood of TCP/SYN packets often with a forged sender address Each of these packets is handled like a connection request causing the server to spawn a half-open connection send back a TCP/SYN-ACK packet and wait for a packet in response from the sender address However because the sender's address is forged the response never comes These half-open connections exhaust the available connections the server can make keeping it from responding to legitimate requests until after the attack ends