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Assessment Title
Rule Text
The network element must ensure that ICMPv6 unreachable notifications and redirects are disabled on all external facing interfaces.
Description
Discussion Text
The Internet Control Message Protocol version 6 (ICMPv6) supports IPv6 traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMPv6 messages under a wide variety of conditions. ICMPv6 messages are commonly used by attackers for network mapping and diagnosis: Host unreachable, and Redirect.
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