2023-08-21 11:42:45 +02:00
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---
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- name: Basic Debian Linux Hardening
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hosts: all
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tasks:
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- name: check if we are in an container env by existing systemd
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stat:
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path: /usr/bin/systemd
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register: nocontainer
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2023-09-28 12:49:13 +02:00
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# - name: Remove root-Password
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# user:
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# name: root
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# password: '*'
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# when: nocontainer.stat.exists == true
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2023-08-21 11:42:45 +02:00
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- name: SSHD hardening
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blockinfile:
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path: /etc/ssh/sshd_config.d/hardening.conf
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mode: "0444"
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owner: root
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group: root
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create: yes
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insertbefore: BOF # Beginning of the file
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marker: "# {mark} ANSIBLE MANAGED BLOCK"
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block: |
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Port 22
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Port 33
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PermitRootLogin prohibit-password
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PermitUserRC no
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PermitUserEnvironment no
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PubkeyAuthentication yes
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X11Forwarding no
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AllowAgentForwarding no
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AllowTcpForwarding yes
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Subsystem sftp internal-sftp -f AUTH -l INFO -u 0007
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## Ciphers Check https://sshcheck.com/server/{{inventory_hostname}}/
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# nmap -p22 -n -sV --script ssh2-enum-algos localhost
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KexAlgorithms curve25519-sha256@libssh.org
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HostKeyAlgorithms ssh-ed25519
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Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com
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MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com
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IgnoreRhosts yes
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LogLevel VERBOSE
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AddressFamily any
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backup: yes
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validate: /usr/sbin/sshd -T -f %s
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notify:
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- Restart sshd
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when: nocontainer.stat.exists == true
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- name: Disable external sftp-Subsystem
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replace:
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path: /etc/ssh/sshd_config
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regexp: '(^Subsystem.*sftp.*)'
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replace: '#\1'
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validate: /usr/sbin/sshd -T -f %s
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backup: yes
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notify:
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- Restart sshd
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when: nocontainer.stat.exists == true
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handlers:
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- name: Restart sshd
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service:
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name: sshd
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state: restarted
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