Managing Reputation In An IPv6 World

A proposed roadmap for maintaining a safe, secure messaging environment as the transition to IPv6 begins.

As Internet Service Providers (ISP) prepare to deploy IPv6, some industry observers have expressed concern that this new standard will impact defenses against messaging abuse. IP reputation has long been a critical element in the defense against abuse with many mailbox providers opting to limit or refuse traffic based on it. Yet conventional approaches to IP reputation tracking will be rendered unworkable as IPv6 expands the Internet address space from 4 billion addresses to an almost incomprehensible 3.4 * 10^38 addresses.

In this new white paper, Alec Peterson, Message Systems Chief Technology Officer, and Robert Marchi, Senior Solutions Architect at anti-abuse application partner eleven, propose specific methodologies for tracking reputation in the IPv6 environment. They put forth a novel approach by which ISPs can continue to track subscriber reputation as a means to effectively combat abuse and filter spam by mapping IP prefixes to subscribers, rather than mapping complete addresses to subscribers. The paper serves as a starting point to prompt industry dialogue on this critical issue.

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