93 lines
2.4 KiB
YAML
93 lines
2.4 KiB
YAML
---
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- name: Set some variables
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set_fact:
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ssh_hardening_backup_suffix: "42.{{ ansible_date_time.date }}@{{ ansible_date_time.time }}~"
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ssh_hardening_distri: "{{ (ansible_distribution|lower).split(' ')[0] }}-{{ ansible_distribution_major_version }}"
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- name: Get SSH version number
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shell: 'ssh -V 2>&1 | grep -o "OpenSSH_[0-9]\+\.[0-9]" | grep -o "[0-9]\+\.[0-9]"'
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changed_when: False
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register: ssh_hardening_version
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- name: Read forced config file
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include_vars: "ssh_{{ ssh_hardening_force }}.yml"
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when: ssh_hardening_force is defined
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- name: Read SSH version config file
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include_vars: "ssh_{{ ssh_hardening_version.stdout_lines.0 }}.yml"
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when: ssh_hardening_force is not defined
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- name: Read distribution specific variables
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include_vars: "{{ item }}"
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with_first_found:
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- "os_{{ ssh_hardening_distri }}.yml"
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- "os_{{ (ansible_distribution|lower).split(' ')[0] }}.yml"
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- "os_{{ (ansible_os_family|lower).split(' ')[0] }}.yml"
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- "os_default.yml"
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- name: Backup sshd_config
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copy:
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src: "{{ ssh_hardening_sshd_config }}"
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dest: "{{ ssh_hardening_sshd_config }}.{{ ssh_hardening_backup_suffix }}"
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remote_src: yes
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owner: root
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group: root
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mode: 0600
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####################
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- name: "Hostkeys: Disable (EC)DSA"
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lineinfile:
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dest: "{{ ssh_hardening_sshd_config }}"
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regexp: '(?i)\s*#*\s*hostkey.*{{ item }}_key'
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state: absent
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loop:
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- dsa
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- ecdsa
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notify: Restart SSH
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- name: "Hostkeys: Enable (RSA &) ED25519"
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lineinfile:
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dest: "{{ ssh_hardening_sshd_config }}"
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regexp: '(?i)\s*#*\s*hostkey.*{{ item }}_key'
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line: 'HostKey /etc/ssh/ssh_host_{{ item }}_key'
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loop: '{{ ssh_hardening_hostkeys }}'
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notify: Restart SSH
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- name: "Renew RSA hostkeys if too short"
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openssh_keypair:
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path: /etc/ssh/ssh_host_rsa_key
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type: rsa
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size: 4096
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when: '"rsa" in ssh_hardening_hostkeys'
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####################
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- name: "INCLUDE: Remove small Diffie-Hellman moduli"
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include_tasks: moduli.yml
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####################
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- name: "Check for crypto-policies"
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stat:
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path: /etc/crypto-policies/back-ends/opensshserver.config
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register: ssh_hardening_use_policies
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- name: "The (RedHat) crypto policy way..."
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include_tasks: restrictions_crypto_policy.yml
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when: ssh_hardening_use_policies.stat.exists
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- name: "The standard config way..."
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include_tasks: restrictions_configfile.yml
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when: not ssh_hardening_use_policies.stat.exists
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