Details

Although IPv6 has many advantages over IPv4, not all organizations have IPv6 or dual stack configurations implemented.

Rationale:

If IPv6 or dual stack is not to be used, it is recommended that IPv6 be disabled to reduce the attack surface of the system.

Solution

Edit /etc/default/grub and remove add ipv6.disable=1 to the GRUB_CMDLINE_LINUX parameters:

GRUB_CMDLINE_LINUX=”ipv6.disable=1″

Run the following command to update the grub2 configuration:

# grub2-mkconfig -o /boot/grub2/grub.cfg

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/2449

This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Unix.

References

• 800-53|SI-4
• CSCv7|9.2

Source

• Tenable.com/audits