Revisiting inter-AS IP spoofing let the protection drive source address validation

IP spoofing, which is prevalently used for anonymity and reflection attacks, has shown increasing destructive power in recent years. Although certain source address validation solutions have been standardized by the Internet Engineering Task Force, few networks are willing to adopt them in view of the deficiency of deployment benefits. Actually, all the source address validation solutions face the problem of a lack of deployability. In this paper, we summarize the key points describing deployability and propose a new security service-inter-autonomous-system (AS) Source Address Protection (iSAP). Technically, by increasing the possibility of keeping the source address belonging to one AS from being the victim of reflection flooding, iSAP improves the deployers ability to prevent IP spoofing and increases incremental deployability. In reality, such a service can also be regarded as a new profit opportunity for ASes and it could progress gradually once it is well commercialized. Based on simulations with real Internet topology data, the results illustrate that iSAP can protect ASes from being reflected with only a few deployers, exhibiting a high potential to mitigate reflection flooding with modest resource consumption.