How To Protect Against Syn Flood Attacks?
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1. Use rate limiting on network infrastructure: Rate limiting is a simple task that can be performed at the network level, such as using firewalls or routers to throttle incoming network traffic. Rate limiting allows a network administrator to control how much data can be sent by a single source, and can prevent large numbers of data packets from overwhelming a system.
2. Implement IP address spoofing protection: Network administrators can implement IP address spoofing protection on their systems, which is a method of making sure that the IP address of an incoming packet matches that of its intended recipient. This prevents attackers from sending SYN flood attacks from spoofed IP addresses.
3. Enforce SYN cookies for TCP connections: SYN cookies are a process whereby the server’s response to a SYN request includes a cookie which the client must use in subsequent messages. This prevents attackers from sending multiple SYN requests from spoofed IP addresses as each packet requires a unique cookie.
4. Utilize intrusion detection systems (IDS): Intrusion detection systems monitor for unusual activity on a network such as an abnormally high number of SYN requests or a large amount of data being sent from a single source. When these types of activities are detected, they can alert a network administrator who can then take steps to stop the attack.
5. Install anti–DDoS software: Anti–DDoS software can be installed on a server or a network infrastructure to detect and react to Denial of Service type attacks such as SYN floods. This commercial off–the–shelf software will recognize these attacks and respond quickly to mitigate any damage.