There are many solutions to prevent DDoS attacks using IP spoofing.

By spoofing the ACK response, the receiver server never receives a completed TCP handshake and may be left holding allocated resources.

This is done by spoofing the IP address in the ACK response in the three-way TCP protocol handshake - SYN, SYN-ACK, ACK. IP address spoofing may also be used to attack application server resources.The objective of the reflected attack is to amplify the output responses from a few requests using techniques such as DNS amplification, Smurf attack or NTP amplification. In a reflected DDoS attack, the attacker sends altered source IP to DNS resolvers, NTP servers and intermediary servers to generate fake requests. The IP address spoofing may also be used to launch a reflected DDoS attack.The IP address modification is used to mask the identity and location of the compromised and malware infected bots. These botnets may be remotely instructed to launch DDoS attacks. A botnet is a collection of infected or compromised bots that are geographically distributed.In an IP address spoofing DDoS attack, the attacker modifies the source IP address of the data packet to disguise an attacker’s origin IP.The source IP address may be altered to disguise an attacker’s origin IP. The Internet Protocol (IP) protocol header includes the source IP address of the sender of the data packet.

The spoofing may be used to launch DDoS attacks in Internet Protocol (IP), Address Resolution Protocol (ARP) and in the Domain Name System (DNS). Spoofing refers to altering an address to impersonate someone else.

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