---
- name: system setup | openssh | copy hardened sshd config for bastion
  tags: openssh,ssh,system,settings
  copy:
    dest: /etc/ssh/sshd_config.d/hardened.conf
    owner: root
    group: root
    mode: '0644'
    content: |
      # This file is managed by Ansible for the bastion role
      # It overwrites/complements settings from the base role.
      LogLevel VERBOSE
      MaxAuthTries 3
      PubkeyAuthentication yes
      AuthorizedKeysFile      .ssh/authorized_keys
      PasswordAuthentication no
      UsePAM yes
      AllowAgentForwarding no
      AllowTcpForwarding no
      X11Forwarding no
      PrintMotd no
      
      # Harden Ciphers and Algorithms
      KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
      Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
      MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com
      HostKeyAlgorithms ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256

      PrintLastLog no
      TCPKeepAlive yes
      Subsystem       sftp    /usr/lib/ssh/sftp-server
      AcceptEnv *
      AllowUsers lowpriv sshjumpuser

      Match User lowpriv,sshjumpuser
              AllowAgentForwarding yes
              AllowTcpForwarding yes
  notify: [ "restart_sshd", "Update_aide_database" ]