RedHat Enterprise Linux 7 CIS compliancy.

Based on the exellent work done by the MindPointGroup Ansible Role](https://galaxy.ansible.com/MindPointGroup/RHEL7-CIS/)

Configure RHEL/Centos 7 machine to be CIS compliant. Level 1 and 2 findings will be corrected by default.

Warning on use

This role will make changes to the system that could break things. This is not an auditing tool but rather a remediation tool to be used after an audit has been conducted.

IMPORTANT INSTALL STEP

If you want to install this via the ansible-galaxy command you'll need to run it like this:

ansible-galaxy install -p roles -r requirements.yml

With this in the file requirements.yml:

- src: https://github.com/schubergphilis/RHEL7-CIS.git

Based on CIS RedHat Enterprise Linux 7 Benchmark v2.1.1 - 01-31-2017 .

This repo originated from work done by Sam Doran

Requirements

You should carefully read through the tasks to make sure these changes will not break your systems before running this playbook. If you want to do a dry run without changing anything, set the below sections (rhel7cis_section1-6) to false.

Role Variables

There are many role variables defined in defaults/main.yml. This list shows the most important.

rhel7cis_notauto: Run CIS checks that we typically do NOT want to automate due to the high probability of breaking the system (Default: false)

rhel7cis_section1: CIS - General Settings (Section 1) (Default: true)

rhel7cis_section2: CIS - Services settings (Section 2) (Default: true)

rhel7cis_section3: CIS - Network settings (Section 3) (Default: true)

rhel7cis_section4: CIS - Logging and Auditing settings (Section 4) (Default: true)

rhel7cis_section5: CIS - Access, Authentication and Authorization settings (Section 5) (Default: true)

rhel7cis_section6: CIS - System Maintenance settings (Section 6) (Default: true)

Disable all selinux functions

rhel7cis_selinux_disable: false

Service variables:

These control whether a server should or should not be allowed to continue to run these services

rhel7cis_avahi_server: false  
rhel7cis_cups_server: false  
rhel7cis_dhcp_server: false  
rhel7cis_ldap_server: false  
rhel7cis_telnet_server: false  
rhel7cis_nfs_server: false  
rhel7cis_rpc_server: false  
rhel7cis_ntalk_server: false  
rhel7cis_rsyncd_server: false  
rhel7cis_tftp_server: false  
rhel7cis_rsh_server: false  
rhel7cis_nis_server: false  
rhel7cis_snmp_server: false  
rhel7cis_squid_server: false  
rhel7cis_smb_server: false  
rhel7cis_dovecot_server: false  
rhel7cis_httpd_server: false  
rhel7cis_vsftpd_server: false  
rhel7cis_named_server: false  
rhel7cis_bind: false  
rhel7cis_vsftpd: false  
rhel7cis_httpd: false  
rhel7cis_dovecot: false  
rhel7cis_samba: false  
rhel7cis_squid: false  
rhel7cis_net_snmp: false  

Designate server as a Mail server

rhel7cis_is_mail_server: false

System network parameters (host only OR host and router)

rhel7cis_is_router: false

IPv6 required

rhel7cis_ipv6_required: true

AIDE

rhel7cis_config_aide: true

AIDE cron settings

rhel7cis_aide_cron:
  cron_user: root
  cron_file: /etc/crontab
  aide_job: '/usr/sbin/aide --check'
  aide_minute: 0
  aide_hour: 5
  aide_day: '*'
  aide_month: '*'
  aide_weekday: '*'  

SELinux policy

rhel7cis_selinux_pol: targeted

Set to 'true' if X Windows is needed in your environment

rhel7cis_xwindows_required: no

Client application requirements

rhel7cis_openldap_clients_required: false 
rhel7cis_telnet_required: false 
rhel7cis_talk_required: false  
rhel7cis_rsh_required: false 
rhel7cis_ypbind_required: false 

Time Synchronization

rhel7cis_time_synchronization: chrony
rhel7cis_time_Synchronization: ntp

rhel7cis_time_synchronization_servers:
    - 0.pool.ntp.org
    - 1.pool.ntp.org
    - 2.pool.ntp.org
    - 3.pool.ntp.org  

3.4.2 | PATCH | Ensure /etc/hosts.allow is configured

rhel7cis_host_allow:
  - "10.0.0.0/255.0.0.0"  
  - "172.16.0.0/255.240.0.0"  
  - "192.168.0.0/255.255.0.0"    

rhel7cis_firewall: firewalld
rhel7cis_firewall: iptables

Dependencies

Ansible > 2.2

Example Playbook

This sample playbook should be run in a folder that is above the main RHEL7-CIS / RHEL7-CIS-devel folder.

- name: Harden Server
  hosts: servers
  become: yes

  roles:
    - RHEL7-CIS

Tags

Many tags are available for precise control of what is and is not changed.

Some examples of using tags:

    # Audit and patch the site
    ansible-playbook site.yml --tags="patch"

License

MIT