127 lines
4.4 KiB
YAML
127 lines
4.4 KiB
YAML
---
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- ansible.builtin.debug:
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msg: "Warning: empty 'evolinux_ssh_password_auth_addresses' variable, tasks will be skipped!"
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when: evolinux_ssh_password_auth_addresses == []
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# From 'man sshd_config' :
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# « If all of the criteria on the Match line are satisfied, the keywords
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# on the following lines override those set in the global section of the config
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# file, until either another Match line or the end of the file.
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# If a keyword appears in multiple Match blocks that are satisfied,
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# only the first instance of the keyword is applied. »
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#
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# We want to allow any user from a list of IP addresses to login with password,
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# but users of the "{{ evolinux_internal_group }}" group can't login with password from other IP addresses
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- name: "Security directives for Evolinux (Debian 10 or later)"
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ansible.builtin.blockinfile:
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dest: /etc/ssh/sshd_config
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marker: "# {mark} EVOLINUX PASSWORD RESTRICTIONS"
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block: |
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Match Address {{ evolinux_ssh_password_auth_addresses | join(',') }}
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PasswordAuthentication yes
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Match Group {{ evolinux_internal_group }}
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PasswordAuthentication no
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insertafter: EOF
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validate: '/usr/sbin/sshd -t -f %s'
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notify: reload sshd
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when:
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- evolinux_ssh_password_auth_addresses != []
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- ansible_distribution_major_version is version('10', '>=')
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- name: Security directives for Evolinux (Jessie/Stretch)
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ansible.builtin.blockinfile:
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dest: /etc/ssh/sshd_config
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marker: "# {mark} EVOLINUX PASSWORD RESTRICTIONS BY ADDRESS"
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block: |
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Match Address {{ evolinux_ssh_password_auth_addresses | join(',') }}
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PasswordAuthentication yes
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insertafter: EOF
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validate: '/usr/sbin/sshd -t -f %s'
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notify: reload sshd
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when:
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- evolinux_ssh_password_auth_addresses != []
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- ansible_distribution_major_version is version('10', '<')
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# We disable AcceptEnv because it can be a security issue, but also because we
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# do not want clients to push their environment variables like LANG.
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- name: disable AcceptEnv in ssh config
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ansible.builtin.replace:
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dest: /etc/ssh/sshd_config
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regexp: '^AcceptEnv'
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replace: "#AcceptEnv"
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notify: reload sshd
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when: evolinux_ssh_disable_acceptenv | bool
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- name: Set log level to verbose (for Debian >= 9)
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ansible.builtin.replace:
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dest: /etc/ssh/sshd_config
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regexp: '^#?LogLevel [A-Z]+'
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replace: "LogLevel VERBOSE"
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notify: reload sshd
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when: ansible_distribution_major_version is version('9', '>=')
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# Should we allow the current user?
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- name: Allow the current user
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block:
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- name: "Get current user"
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ansible.builtin.command:
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cmd: logname
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changed_when: False
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register: _logname
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check_mode: no
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- name: verify AllowUsers directive
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ansible.builtin.command:
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cmd: "grep -E '^AllowUsers' /etc/ssh/sshd_config"
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failed_when: False
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changed_when: False
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register: grep_allowusers_ssh
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check_mode: no
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- name: verify AllowGroups directive
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ansible.builtin.command:
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cmd: "grep -E '^AllowGroups' /etc/ssh/sshd_config"
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failed_when: False
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changed_when: False
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register: grep_allowgroups_ssh
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check_mode: no
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# If we have AllowUsers but not AllowGroups, append the user to the list
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- name: "Modify AllowUsers sshd directive for current user"
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ansible.builtin.replace:
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dest: /etc/ssh/sshd_config
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regexp: '^(AllowUsers ((?!{{ _logname.stdout }}).)*)$'
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replace: '\1 {{ _logname.stdout }}'
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validate: '/usr/sbin/sshd -t -f %s'
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notify: reload sshd
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when:
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- grep_allowusers_ssh.rc == 0
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- grep_allowgroups_ssh.rc != 0
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# If we have AllowGroups but not AllowUsers, add the user to the group and append the group to the list
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- name: "Add current user to {{ evolinux_ssh_group }} group"
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ansible.builtin.user:
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name: "{{ _logname.stdout }}"
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group: "{{ evolinux_ssh_group }}"
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append: yes
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when:
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- grep_allowusers_ssh.rc != 0
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- grep_allowgroups_ssh.rc == 0
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- name: "Append '{{ evolinux_ssh_group }}' to AllowGroups sshd directive"
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ansible.builtin.replace:
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dest: "/etc/ssh/sshd_config"
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regexp: '^(AllowGroups ((?!{{ evolinux_ssh_group }}).)*)$'
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replace: '\1 {{ evolinux_ssh_group }}'
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validate: '/usr/sbin/sshd -t -f %s'
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notify: reload sshd
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when:
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- grep_allowusers_ssh.rc != 0
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- grep_allowgroups_ssh.rc == 0
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when: evolinux_ssh_allow_current_user | bool
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- ansible.builtin.meta: flush_handlers
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