sshd

Ansible Role SSHD

Ansible role l3d.users.sshd to Manage SSHD Configuration of the system and which Accounts are allowed to login.

There are two variables to define users. The l3d_users__default_users is ment to put to your group_vars to define a default for your system. The l3d_users__local_users could be put in your host_vars to define host-specific user and admin roles.

Variables:

User Management

• The dictionary-variable for your group_vars to set your general users and admins is l3d_users__default_users.
• The dictionary-variable for your host_vars to set your host-specific users and admins is: l3d_users__local_users. The Option of these directory-variables are the following.

option	values	required	description
name	string	required	The user you want to create
state	present	-	Create or delete user
shell	/bin/bash	-	The Shell of the User
create_home	true	-	create a user home (needed to store ssh keys)
admin	false	-	enable it to give the user superpowers
admin_commands	string or list	-	Commands that are allows to be run as admin, eg. 'ALL' or specific script
admin_nopassword	false	-	Need no Password for sudo
admin_ansible_login	true	-	if admin: true and l3d_users__create_ansible: true your ssh keys will be added to ansible user
pubkeys	string or lookup	-	see examples
exclusive_pubkeys	true	-	delete all undefined ssh keys
password	password hash	-	See official FAQ
groups	list	-	Additional groups for your user
remove	false	-	completly remove user if state: absent

There is a third directory-variable called l3d_users__ssh_login: [] which only support name and state for users, that sould be able to login on that system.

Other Variables

name	default value	description
l3d_users__limit_login	true	Only allow SSH login for specified users
l3d_users__sshd_port	22	Port for SSH
l3d_users__sshd_password_authentication	false	Allow login with Password
l3d_users__sshd_permitrootlogin	false	Allow login as root
l3d_users__create_ansible	true	Create Ansible User
l3d_users__ansible_user_state	present	Ansible User State
l3d_users__sshd_manage_server_key_types	true	Manage Server SSH Key types
l3d_users__sshd_server_key_types	['ed25519']	List of supported SSH Key Types
l3d_users__sshd_manage_key_algorithmus	true	Manage SSH Key Algorythmins
l3d_users__sshd_key_algorithmus	['ssh-ed25519-cert-v01@openssh.com', 'ssh-ed25519', 'ecdsa-sha2-nistp521-cert-v01@openssh.com', 'ecdsa-sha2-nistp384-cert-v01@openssh.com', 'ecdsa-sha2-nistp256-cert-v01@openssh.com']	Used SSH Key Algorithms
l3d_users__sshd_manage_kex_algorithmus	true	Manage SSH Kex Algorythms
l3d_users__sshd_kex_algorithmus	['curve25519-sha256@libssh.org', 'diffie-hellman-group-exchange-sha256', 'diffie-hellman-group-exchange-sha1']	Used Kex Algorythms
l3d_users__sshd_manage_ciphers	true	Manage SSH Ciphers
l3d_users__sshd_ciphers	['chacha20-poly1305@openssh.com', 'aes256-gcm@openssh.com', 'aes256-ctr']	Used SSH Ciphers
l3d_users__sshd_manage_macs	true	Manage Used MACs
l3d_users__sshd_macs	['hmac-sha2-512-etm@openssh.com', 'hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512']	Used MACs
l3d_users__sshd_xforwarding	true	Enable X-Forwarding
l3d_users__server_key_mode	0600	Mode of server keys in Filesystem
l3d_users__sshd_userrules	[]	Array for custom SSHD rules
l3d_users__sshd_userrules[].name		user for the custom SSHD rules
l3d_users__sshd_userrules[].rules	[]	list of custom SSHD rules for a user
submodules_versioncheck	false	Optionaly enable simple versionscheck of this role

Example Playbook

- name: Create System with User and Passwords
  hosts: example.com
  roles:
    - {role: l3d.users.sshd, tags: 'sshd'}
  vars:
    l3d_users__local_users:
      - name: 'alice'
        state: 'present'
      - name: 'bob'
        state: 'present'
    l3d_users__ssh_login:
      - name: 'charlie'
        state: 'present'

    l3d_users__limit_login: true
    l3d_users__create_ansible: true
    submodules_versioncheck: true