Security

Defending Denial of Service: State Overload Attacks

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Executive Summary

In a Denial-of-Service (DoS) attack, an attacker attempts to prevent legitimate users from accessing information or services. By targeting one's computer and its network connection, or the computers and network of the sites they are trying to use, an attacker may be able to prevent one from accessing email, web sites, online accounts (banking, etc.), or other services that rely on the affected computer. Several value-added services have been proposed for deployment in the Internet. IP multicast is an example of such a service. IP multicast is a stateful service in that it requires routers to maintain state for forwarding multicast data toward receivers.

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