Abstract-We propose an architecture called secure overlay services (SOS) that proactively prevents denial of service (DoS) attacks, geared toward supporting emergency services, or similar types of communication. The architecture uses a combination of secure overlay tunneling, routing via consistent hashing, and filtering. We reduce the probability of successful attacks by: 1) performing intensive filtering near protected network edges, pushing the attack point perimeter into the core of the network, where high-speed routers can handle the volume of attack traffic and 2) introducing randomness and anonymity into the forwarding architecture, making it difficult for an attacker to target nodes along the path to a specific SOS-protected destination. Using simple analytical models, we evaluate the likelihood that an attacker can successfully launch a DoS attack against an SOSprotected network. Our analysis demonstrates that such an architecture reduces the likelihood of a successful attack to minuscule levels. Our performance measurements using a prototype implementation indicate an increase in end-to-end latency by a factor of two for the general case, and an average heal time of less than 10 s. Index Terms-Access control, denial of service (DoS) attacks, overlay networks, packet filtering, peer-to-peer (P2P) networks.
These levels of indirection may increase latency by a factor of 5 or even 10 REF .
SOS: an architecture for mitigating DDoS attacks
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Computer Science