thingies

ansible/infra/01_user_and_access_setup_playbook.yml

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+- name: Secure Debian VPS
+  hosts: vipy
+  vars_files:
+    - ../vars.yml
+  become: true
+
+  tasks:
+    - name: Update and upgrade apt packages
+      apt:
+        update_cache: yes
+        upgrade: full
+        autoremove: yes
+
+    - name: Create new user
+      user:
+        name: "{{ new_user }}"
+        groups: sudo
+        shell: /bin/bash
+        state: present
+        create_home: yes
+
+    - name: Set up SSH directory for new user
+      file:
+        path: "/home/{{ new_user }}/.ssh"
+        state: directory
+        mode: "0700"
+        owner: "{{ new_user }}"
+        group: "{{ new_user }}"
+
+    - name: Copy current user's authorized_keys to new user
+      copy:
+        src: "/home/{{ ansible_user }}/.ssh/authorized_keys"
+        dest: "/home/{{ new_user }}/.ssh/authorized_keys"
+        owner: "{{ new_user }}"
+        group: "{{ new_user }}"
+        mode: "0600"
+        remote_src: true
+
+    - name: Allow new user to run sudo without password
+      copy:
+        dest: "/etc/sudoers.d/{{ new_user }}"
+        content: "{{ new_user }} ALL=(ALL) NOPASSWD:ALL"
+        owner: root
+        group: root
+        mode: "0440"
+
+    - name: Disable root login
+      lineinfile:
+        path: /etc/ssh/sshd_config
+        regexp: "{{ item.regexp }}"
+        line: "{{ item.line }}"
+        state: present
+        backrefs: yes
+      loop:
+        - { regexp: "^#?PermitRootLogin .*", line: "PermitRootLogin no" }
+        - {
+            regexp: "^#?PasswordAuthentication .*",
+            line: "PasswordAuthentication no",
+          }
+
+    - name: Restart SSH
+      service:
+        name: ssh
+        state: restarted
+

ansible/infra/02_firewall_playbook.yml

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+- name: Secure Debian VPS
+  hosts: vipy
+  vars_files:
+    - ../vars.yml
+  become: true
+
+  tasks:
+    - name: Install UFW
+      apt:
+        name: ufw
+        state: present
+
+    - name: Turn UFW off
+      ufw:
+        state: disabled
+
+    - name: Configure UFW default rules
+      ufw:
+        policy: deny
+        direction: incoming
+
+    - name: Allow outgoing traffic
+      ufw:
+        rule: allow
+        direction: out
+
+    - name: Allow SSH port through UFW
+      ufw:
+        rule: allow
+        direction: in
+        port: "{{ ssh_port }}"
+        proto: tcp
+        from_ip: "{{ allow_ssh_from if allow_ssh_from != 'any' else omit }}"
+
+    - name: Turn UFW on
+      ufw:
+        state: enabled
+
+    - name: Install fail2ban
+      apt:
+        name: fail2ban
+        state: present
+
+    - name: Ensure fail2ban is running
+      service:
+        name: fail2ban
+        enabled: yes
+        state: started
+
+    - name: Remove unnecessary services
+      apt:
+        name: "{{ item }}"
+        state: absent
+        purge: yes
+      loop:
+        - exim4
+        - apache2
+        - cups
+        - rpcbind
+        - nfs-common
+        - telnet
+        - ftp
+        - samba
+
+    - name: Install auditd
+      apt:
+        name:
+          - auditd
+          - audispd-plugins
+        state: present
+
+    - name: Enable and start auditd
+      service:
+        name: auditd
+        enabled: yes
+        state: started