cyberstrikeus 3.3.3 Ensure IPv6 is disabled (Not Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
Although IPv6 has many advantages over IPv4, few organizations have implemented IPv6.
Rationale
If IPv6 is not to be used, it is recommended that it be disabled to reduce the attack surface of the system.
Audit Procedure
Run the following command and verify that each linux line has the ipv6.disable=1 parameter set:
grep "^\s*linux" /boot/grub/grub.cfg
Expected Result
Each linux line should contain ipv6.disable=1.
Remediation
Edit /etc/default/grub and add ipv6.disable=1 to GRUB_CMDLINE_LINUX:
GRUB_CMDLINE_LINUX="ipv6.disable=1"
Run the following command to update the grub2 configuration:
update-grub
Default Value
IPv6 is enabled by default.
References
- CIS Controls: 3 - Secure Configurations for Hardware and Software on Mobile Devices, Laptops, Workstations, and Servers
- CIS Controls: 11 - Secure Configurations for Network Devices such as Firewalls, Routers and switches
Profile
- Level 1 - Server
- Level 1 - Workstation