The router administrator will ensure ICMPv6 unreachable notifications, and redirects are disabled on all external interfaces of the premise router.

From Infrastructure Router Security Technical Implementation Guide Juniper

Part of ICMPv6 unreachable notifications and redirects must be disabled

SV-15322r1_rule The router administrator will ensure ICMPv6 unreachable notifications, and redirects are disabled on all external interfaces of the premise router.

Vulnerability discussion

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.

Check content

Review the active configuration to determine if controls have been defined to ensure router has ICMPv6 unreachables or redirects disabled any external interfaces.

Fix text

The network element configuration must be changed to ensure ICMPv6 unreachables and redirects are disabled at all external interfaces.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.