Title

The system must be configured with a default gateway for IPv6 if the system uses IPv6, unless the system is a router. (Cat II impact)

Discussion

If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of Service attacks.

Check Content

Check for a default route for IPv6. # netstat -f inet6 -r | grep default If the system uses IPv6, and no results are returned, this is a finding.

Fix Text

Add a default route for IPv6. # route add -inet6 default <gateway> Add this command to an init script.

Additional Identifiers

Rule ID: SV-227910r603266_rule

Vulnerability ID: V-227910

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.