SAV6: A Novel Inter-AS Source Address Validation Protocol for IPv6 Internet

IP spoofing is prevalently used for anonymity and reflection attacks, e.g., distributed denial of service (DDoS) attacks, which have shown increasingly destructive power in recent years because today's Internet lacks validation on source addresses. Moreover, the fast deployment of IPv6 on the Internet may further aggravate the damages of DDoS attacks. This paper proposes a novel source address validation mechanism called SAV6, which leverages the huge IPv6 address space to validate source addresses at an inter-autonomous system (AS) granularity. In SAV6, each IPv6 address contains an AS number (ASN), whose corresponding AS announces the prefix of the address to other ASes. An AS can determine the authenticity of the source address by whether the ASN in the address matches the corresponding prefix after receiving an incoming packet. The performance evaluation of a SAV6 prototype shows that it adds little performance overhead to the deployed infrastructures and is a lightweight and deployable protocol.