Ansible/ssh-hardening
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ssh-hardening/README.md
Sven Velt 18ed1ea57e Update README
2024-07-10 11:21:35 +02:00

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ssh-hardening

SSH server hardening, based on https://www.sshaudit.com & more

Requirements

  • OpenSSH versions 6.5+

Role Variables

Defaults:

  • ssh_hardening_hostkeys: rsa, ed25519
  • ssh_hardening_hostkeys_all: dsa, ecdsa, rsa, ed25519
  • ssh_hardening_moduli: /etc/ssh/moduli
  • ssh_hardening_moduli_backup: /etc/ssh/moduli.not-hardened
  • ssh_hardening_root_group: root
  • ssh_hardening_service_name: sshd
  • ssh_hardening_sshd_config: /etc/ssh/sshd_config

Included via vars/ssh_*:

  • ssh_hardening_opts: Parameter/Values to set for specific SSH version

Included via vars/os_*:

  • ssh_hardening_moduli
  • ssh_hardening_moduli_backup
  • ssh_hardening_service_name
  • ssh_hardening_root_group

Command line variables (undefined):

  • ssh_hardening_force: version/id to include, overwrites detected version!

Dependencies

  • None

Example Playbook

- hosts: servers
  roles:
     - { role: ssh-hardening }

SSH versions

  • 6.0: [_] Debian 7 "wheezy"
  • 6.5: (support for curve25519-sha256@libssh.org, ssh-ed25519, chacha20-poly1305@openssh.com)
  • 6.6: ✅ Ubuntu 14.04 "trusty"
  • 6.7: ✅ Debian 8 "jessie"
  • 7.0:
  • 7.1:
  • 7.2: ✅ Ubuntu 16.04 "xenial"
  • 7.4: ✅ Debian 9 "stretch", ✅ RedHat 7 - (added curve25519-sha256)
  • 7.6: ✅ Ubuntu 18.04 "bionic"
  • 7.7:
  • 7.8:
  • 7.9: ✅ Debian 10 "buster"
  • 8.0: ✅ RedHat 8
  • 8.1: ✅ Suse 15.2
  • 8.2: ✅ Ubuntu 20.04 "focal"
  • 8.3:
  • 8.4: ✅ Alpine 3.13, ✅ Debian 11 "bullseye", ✅ Fedora 33, ✅ OpenSUSE 15.3/15.4
  • 8.5: (added sntrup761x25519-sha512@openssh.com)
  • 8.6: ✅ Alpine 3.14, ✅ Fedora 34
  • 8.7: ✅ Fedora 35
  • 8.8: ✅ Alpine 3.15, ✅ Fedora 36, ✅ Fedora 37
  • 8.9: ✅ Ubuntu 22.04 "jammy"
  • 9.0: ✅ Alpine 3.16, ✅ Fedora 38, ✅ Ubuntu 22.10 "kinetic", ✅ Ubuntu 23.04 "lunar"
  • 9.1: ✅ Alpine 3.17
  • 9.2: ✅ Debian 12 "bookworm"
  • 9.3: ✅ Alpine 3.18, ✅ Fedora 39, ✅ Ubuntu 23.10 "mantic"
  • 9.4:
  • 9.5:
  • 9.6: ✅ Alpine 3.19, Fedora 40, Ubuntu 24.04 "noble"
  • 9.7: ✅ Alpine 3.20
  • 9.8: Archlinux, ✅ Voidlinux

License

AGPL3.0-or-later

Author Information