Ansible/ssh-hardening
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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_sshd_config: /etc/ssh/sshd_config

Included via vars/ssh_*:

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

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
  • 8.9: Ubuntu 22.04 "jammy"
  • 9.0: Archlinux, Voidlinux, Alpine 3.16, Ubuntu 22.10 "kinetic"

License

AGPL3.0-or-later

Author Information