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. Edit /etc/rc.config.d/netconf-ipv6 Add an IPV6_GATEWAY[0]="<gateway>" Restart the system to apply the new default gateway setting.

Additional Identifiers

Rule ID: SV-26805r1_rule

Vulnerability ID: V-22490

Group Title: GEN005570

Expert Comments

CCIs tied to check.

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