| 3.3.3 Ensure /etc/hosts.deny is configured | CIS Aliyun Linux 2 L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.1 Ensure default deny firewall policy - Chain FORWARD | CIS Aliyun Linux 2 L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.1 Ensure default deny firewall policy - Chain OUTPUT | CIS Aliyun Linux 2 L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.1 Ensure ufw is installed | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.1 Ensure ufw is installed | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.2 Ensure loopback traffic is configured - input | CIS Aliyun Linux 2 L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.3.3 Ensure IPv6 outbound and established connections are configured | CIS Amazon Linux 2 STIG v1.0.0 L1 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.4 Ensure ufw loopback traffic is configured - v4 | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.4 Ensure ufw loopback traffic is configured - v6 | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.5 Ensure ufw outbound connections are configured | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.1.7 Ensure ufw default deny firewall policy | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.2.3 Ensure iptables are flushed with nftables - v4 | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.2.3 Ensure iptables are flushed with nftables - v6 | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.2.4 Ensure a nftables table exists | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.2.9 Ensure nftables service is enabled | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.2.9 Ensure nftables service is enabled | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.3.1.1 Ensure iptables packages are installed - iptables | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.3.2.1 Ensure iptables default deny firewall policy - 'Chain FORWARD' | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.3.2.1 Ensure iptables default deny firewall policy - 'Chain INPUT' | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.3.2.2 Ensure iptables loopback traffic is configured | CIS Ubuntu Linux 16.04 LTS Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.5.3.3.1 Ensure ip6tables default deny firewall policy - 'Chain OUTPUT' | CIS Ubuntu Linux 16.04 LTS Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.1.4 Ensure loopback traffic is configured - allow out v6 | CIS Debian Family Workstation L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.1.4 Ensure loopback traffic is configured - deny in from ::1 | CIS Debian Family Server L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.1.5 Ensure outbound connections are configured | CIS Debian Family Workstation L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.1.6 Ensure firewall rules exist for all open ports | CIS Debian Family Workstation L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.1 Ensure IPv4 default deny firewall policy - FORWARD | CIS Red Hat 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.1 Ensure IPv4 default deny firewall policy - FORWARD | CIS CentOS 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.1 Ensure IPv4 default deny firewall policy - INPUT | CIS CentOS 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.1 Ensure IPv4 default deny firewall policy - OUTPUT | CIS Oracle Linux 6 Workstation L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.1 Ensure IPv4 default deny firewall policy - OUTPUT | CIS CentOS 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.3 Ensure iptables are flushed - v4 | CIS Debian Family Server L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.3 Ensure loopback traffic is configured - v4 | CIS Ubuntu Linux 18.04 LXD Host L1 Server v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.2.3 Ensure loopback traffic is configured - v6 | CIS Ubuntu Linux 18.04 LXD Host L1 Workstation v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - FORWARD | CIS Red Hat 6 Workstation L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - FORWARD | CIS Oracle Linux 6 Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - FORWARD | CIS CentOS 6 Workstation L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - INPUT | CIS Red Hat 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - INPUT | CIS Red Hat 6 Workstation L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.1 Ensure IPv6 default deny firewall policy - OUTPUT | CIS CentOS 6 Workstation L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.2 Ensure IPv6 loopback traffic is configured - OUTPUT | CIS Red Hat 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.2.2 Ensure loopback traffic is configured - OUTPUT | CIS Debian Family Server L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.3.1 Ensure IPv6 default deny firewall policy - Chain FORWARD | CIS Debian Family Server L1 v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - iptables | CIS Red Hat 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - iptables | CIS Oracle Linux 6 Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - iptables | CIS CentOS 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - ss | CIS Red Hat 6 Server L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - ss | CIS Oracle Linux 6 Server L1 v2.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.6.3.4 Ensure IPv6 firewall rules exist for all open ports - ss | CIS CentOS 6 Workstation L1 v3.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 3.8 Disable IPv6 | CIS Ubuntu Linux 18.04 LXD Host L2 Server v1.0.0 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
| 4.8 Enable IP6tables | CIS Red Hat Enterprise Linux 5 L1 v2.2.1 | Unix | SYSTEM AND COMMUNICATIONS PROTECTION |
