PhilandClaude Opus 5.5
dff614b481
sshd accepted passwords from the internet (about 12,000 failed logins a day) and root logins with a key. Keys only now, no root, no X11 forwarding. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
44 lines
1.2 KiB
YAML
44 lines
1.2 KiB
YAML
- name: Install common packages
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apt:
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name:
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- aptitude
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- jq
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state: latest
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update_cache: true
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- name: UFW - Enable and deny by default
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community.general.ufw:
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state: enabled
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default: deny
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# Security updates install themselves each day (Debian's default origins:
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# the -security archive only). No automatic reboots.
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- name: Install unattended-upgrades
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ansible.builtin.apt:
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name: unattended-upgrades
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state: present
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- name: Turn on daily unattended upgrades
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ansible.builtin.copy:
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dest: /etc/apt/apt.conf.d/20auto-upgrades
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owner: root
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mode: '0644'
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content: |
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APT::Periodic::Update-Package-Lists "1";
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APT::Periodic::Unattended-Upgrade "1";
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# Keys only. sshd_config's Include comes first and sshd keeps the first value
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# it reads, so this drop-in overrides the defaults further down. Root has no
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# keys, and Ansible logs in as the regular user.
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- name: SSH - keys only, no root login, no X11
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ansible.builtin.copy:
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dest: /etc/ssh/sshd_config.d/10-hardening.conf
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owner: root
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mode: '0644'
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content: |
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PasswordAuthentication no
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KbdInteractiveAuthentication no
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PermitRootLogin no
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X11Forwarding no
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validate: /usr/sbin/sshd -t -f %s
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notify: reload ssh
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