refactor(hardening): update security handlers and tasks

- Update hardening handlers for service restart management
- Modify hardening tasks for improved security configurations
- Align with container scanning integration

Part of: Infrastructure hardening improvements

roles/hardening/handlers/main.yml

@@ -3,3 +3,8 @@
   service:
     name: rsyslog
     state: restarted
+
+- name: Restart SSH
+  service:
+    name: ssh
+    state: restarted

roles/hardening/tasks/main.yml

@@ -1,4 +1,48 @@
 ---
+- name: Install unattended-upgrades for automatic security updates
+  apt:
+    name:
+      - unattended-upgrades
+      - apt-listchanges
+    state: present
+    update_cache: true
+
+- name: Configure unattended-upgrades for security updates only
+  copy:
+    dest: /etc/apt/apt.conf.d/50unattended-upgrades
+    owner: root
+    group: root
+    mode: "0644"
+    content: |
+      Unattended-Upgrade::Allowed-Origins {
+          "${distro_id}:${distro_codename}-security";
+          "${distro_id}ESMApps:${distro_codename}-apps-security";
+          "${distro_id}ESM:${distro_codename}-infra-security";
+      };
+      Unattended-Upgrade::Package-Blacklist {
+      };
+      Unattended-Upgrade::AutoFixInterruptedDpkg "true";
+      Unattended-Upgrade::MinimalSteps "true";
+      Unattended-Upgrade::InstallOnShutdown "false";
+      Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
+      Unattended-Upgrade::Remove-Unused-Dependencies "true";
+      Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
+      Unattended-Upgrade::SyslogEnable "true";
+      Unattended-Upgrade::SyslogFacility "daemon";
+      Unattended-Upgrade::OnlyOnACPower "false";
+
+- name: Enable automatic updates via periodic apt configuration
+  copy:
+    dest: /etc/apt/apt.conf.d/20auto-upgrades
+    owner: root
+    group: root
+    mode: "0644"
+    content: |
+      APT::Periodic::Update-Package-Lists "1";
+      APT::Periodic::Unattended-Upgrade "1";
+      APT::Periodic::Download-Upgradeable-Packages "1";
+      APT::Periodic::AutocleanInterval "7";
+
 - name: Install rsyslog
   apt:
     name: rsyslog
@@ -11,6 +55,18 @@
     state: started
     enabled: true
 
+- name: Check if reboot is required
+  stat:
+    path: /var/run/reboot-required
+  register: reboot_required_file
+  changed_when: false
+
+- name: Display reboot required message
+  debug:
+    msg: "REBOOT REQUIRED: Security updates installed requiring system restart"
+  when: reboot_required_file.stat.exists
+  changed_when: false
+
 - name: Configure rsyslog to write UFW kernel logs to /var/log/ufw.log
   copy:
     dest: /etc/rsyslog.d/20-ufw.conf
@@ -51,8 +107,67 @@
           endscript
       }
 
-- name: Set UFW logging level to low
-  command: ufw logging low
-  register: ufw_logging
-  changed_when: "'Logging enabled' in ufw_logging.stdout or 'Logging:' in ufw_logging.stdout"
+- name: Tighten sudo privileges for ansible user
+  copy:
+    dest: /etc/sudoers.d/90-ansible
+    owner: root
+    group: root
+    mode: "0440"
+    validate: /usr/sbin/visudo -csf %s
+    content: |
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/apt-get *, /usr/bin/apt *, /usr/bin/dpkg *
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/systemctl *, /bin/systemctl *
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/docker *, /usr/local/bin/docker *
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/mkdir /opt/*, /bin/mkdir /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/chown /opt/*, /bin/chown /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/chmod /opt/*, /bin/chmod /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/cp /opt/*, /bin/cp /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/mv /opt/*, /bin/mv /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/rm /opt/*, /bin/rm /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/tee /opt/*, /bin/tee /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/bin/cat /opt/*, /bin/cat /opt/*
+      ansible ALL=(ALL) NOPASSWD: /usr/sbin/ufw *
+      ansible ALL=(ALL) NOPASSWD: /sbin/sysctl *, /usr/sbin/sysctl *
   failed_when: false
+
+- name: Include container scanning tasks
+  include_tasks: container-scanning.yml
+  when: enable_container_scanning | default(true) | bool
+
+- name: Ensure SSH directory exists
+  file:
+    path: /etc/ssh/sshd_config.d
+    state: directory
+    mode: "0755"
+
+- name: Configure SSH hardening
+  copy:
+    dest: /etc/ssh/sshd_config.d/99-infra-ansible.conf
+    owner: root
+    group: root
+    mode: "0644"
+    content: |
+      # Ansible-managed SSH hardening
+      PermitRootLogin no
+      PasswordAuthentication no
+      KbdInteractiveAuthentication no
+      ChallengeResponseAuthentication no
+      PubkeyAuthentication yes
+      UsePAM yes
+      ClientAliveInterval 180
+      LoginGraceTime 30
+      MaxAuthTries 3
+      MaxSessions 10
+      MaxStartups 10:30:60
+      StrictModes yes
+      AuthorizedKeysFile .ssh/authorized_keys
+  notify: Restart SSH
+
+- name: Ensure fail2ban SSH jail port matches actual SSH port
+  lineinfile:
+    path: /etc/ssh/sshd_config.d/99-infra-ansible.conf
+    regexp: '^Port\s+'
+    line: "Port {{ ansible_port | default(22) }}"
+    create: false
+  notify: Restart SSH
+  when: ansible_port is defined and ansible_port != 22