openvpn

This role installs OpenVPN, configures it as a server, sets up networking (either iptables or firewalld), and can optionally create client certificates.

Tested OSes (TravisCI):

• Fedora 28+
• CentOS 7

Requirements

Openvpn must be available as a package in yum/apt! For CentOS users, this role will run yum install epel-release to ensure openvpn is available.

Ubuntu precise has a weird bug that might make the iptables-persistent install fail. There is a workaround.

Role Variables

Variable	Type	Choices	Default	Comment
openvpn_base_dir	string		/etc/openvpn	Path where your OpenVPN config will be stored
openvpn_ovpn_dir	string		/etc/openvpn	Path where your client configurations will be stored
openvpn_key_dir	string		/etc/openvpn/keys	Path where your server private keys and CA will be stored
openvpn_local	string			Local host name or IP address for bind. If specified, OpenVPN will bind to this address only. If unspecified, OpenVPN will bind to all interfaces.
openvpn_port	int		1194	The port you want OpenVPN to run on. If you have different ports on different servers, I suggest you set the port in your inventory file.
openvpn_server_hostname	string		{{inventory_hostname}}	The server name to place in the client configuration file (if different from the inventory_hostname
openvpn_proto	string	udp, tcp	udp	The protocol you want OpenVPN to use
openvpn_dualstack	boolean		true	Whether or not to use a dualstack (IPv4 + v6) socket
openvpn_config_file	string		openvpn_{{ openvpn_proto }}_{{ openvpn_port }}	The config file name you want to use
openvpn_rsa_bits	int		2048	Number of bit used to protect generated certificates
openvpn_service_name	string		openvpn	Name of the service. Used by systemctl to start the service
openvpn_uninstall	boolean	true , false	false	Set to true to uninstall the OpenVPN service
openvpn_use_pregenerated_dh_params	boolean	true , false	false	DH params are generted with the install by default
openvpn_use_hardened_tls	boolean	true , false	true	Require a minimum version of TLS 1.2
openvpn_use_modern_tls	boolean	true , false	true	Use modern Cipher for TLS encryption (Not recommended with OpenVPN 2.4)
openvpn_verify_cn	boolean	true , false	false	Check that the CN of the certificate match the FQDN
openvpn_redirect_gateway	boolean	true , false	true	OpenVPN gateway push
openvpn_set_dns	boolean	true , false	true	Will push DNS to the client (Cloudflare and Google)
openvpn_enable_management	boolean	true , false	true
openvpn_management_bind	string		/var/run/openvpn/management unix	The interface to bind on for the management interface. Can be unix or TCP socket.
openvpn_management_client_user	string		root	Use this user when using a Unix socket for management interface.
openvpn_server_network	string		10.9.0.0	Private network used by OpenVPN service
openvpn_server_netmask	string		255.255.255.0	Netmask of the private network
tls_auth_required	boolean	true , false	true	Ask the client to push the generated ta.key of the server during the connection
firewalld_default_interface_zone	string		public	Firewalld zone where the "ansible_default_ipv4.interface" will be pushed into
openvpn_server_ipv6_network	boolean	true , false	false	If set, the network address and prefix of an IPv6 network to assign to clients. If True, IPv4 still used too.
openvpn_ca_key	dict			Contain "crt" and "key". If not set, CA cert and key will be automatically generated on the target system.
openvpn_tls_auth_key	string			Single item with a pre-generated TLS authentication key.
openvpn_topology	boolean	true , false	false	the "topology" keyword will be set in the server config with the specified value.
openvpn_push	list		empty	Set here a list of string that will be placed as "push "". E.g - route 10.20.30.0 255.255.255.0 will generate push "route 10.20.30.0 255.255.255.0"
openvpn_use_ldap	boolean	true , false	false	Active LDAP backend for authentication. Client certificate not needed anymore
ldap	dict			Dictionary that contain LDAP configuration
manage_firewall_rules	boolean	true , false	true	Allow playbook to manage iptables
openvpn_crl_path	string			Define a path to the CRL file for revokations.
openvpn_use_crl	boolean	true , false		Configure OpenVPN server to honor certificate revocation list.
clients	list		[]	List of clients to add to OpenVPN
openvpn_sync_certs	boolean	true , false	false	Revoke certificates not explicitly defined in 'clients'
openvpn_revoke_these_certs	list		[]	List of client certificates to revoke.
openvpn_client_register_dns	boolean	true , false	true	Add register-dns option to client config (Windows only).
openvpn_duplicate_cn	boolean	true , false	false	Add duplicate-cn option to server config - this allows clients to connect multiple times with the one key. NOTE: client ip addresses won't be static anymore!
openvpn_addl_server_options	list		empty	List of user-defined server options that are not already present in the server template. (e.g. - ping-timer-rem)
openvpn_addl_client_options	list		empty	List of user-defined client options that are not already present in the client template. (e.g. - mssfix 1400)
openvpn_status_version	int	1, 2, 3	1	Define the formatting of the openvpn-status.log file where are listed current client connection
openvpn_resolv_retry	int/string	any int, infinite	5	Hostname resolv failure retry seconds. Set "infinite" to retry indefinitely in case of poor connection or laptop sleep mode recovery etc.
openvpn_client_to_client	boolean	true, false	false	Set to true if you want clients to access each other.
openvpn_masquerade_not_snat	boolean	true, false	false	Set to true if you want to set up MASQUERADE instead of the default SNAT in iptables.
openvpn_compression	string		lzo	Set compress compression option. Empty for no compression.
openvpn_cipher	string		AES-256-CBC	Set cipher option for server and client.
openvpn_auth_alg	string		SHA256	Set auth authentication algoritm.
openvpn_tun_mtu	int			Set tun-mtu value. Empty for default.
openvpn_log_dir	string		/var/log	Set location of openvpn log files. This parameter is a part of log-append configuration value.
openvpn_log_file	string		openvpn.log	Set log filename. This parameter is a part of log-append configuration value.
openvpn_logrotate_config	string		See defaults/main.yml	Configure logrotate script.
openvpn_keepalive_ping	int		5	Set keepalive ping interval seconds.
openvpn_keepalive_timeout	int		30	Set keepalive timeout seconds
openvpn_service_user	string		nobody	Set the openvpn service user.
openvpn_service_group	string		nogroup	Set the openvpn service group.

LDAP object

Variable	Type	Choices	Default	Comment
url	string		ldap://host.example.com	Address of you LDAP backend with syntax ldap[s]://host[:port]
anonymous_bind	string	False , True	False	This is not an Ansible boolean but a string that will be pushed into the configuration file,
bind_dn	string		uid=Manager,ou=People,dc=example,dc=com	Bind DN used if "anonymous_bind" set to "False"
bind_password	string		mysecretpassword	Password of the bind_dn user
tls_enable	string	yes , no	no	Force TLS encryption. Not necessary with ldaps addresses
tls_ca_cert_file	string		/etc/openvpn/auth/ca.pem	Path to the CA ldap backend. This must must has been pushed before
tls_cert_file	string			Path to client authentication certificate
tls_key_file	string			Path to client authentication key
base_dn	string		ou=People,dc=example,dc=com	Base DN where the backend will look for valid user
search_filter	string		(&(uid=%u)(accountStatus=active))	Filter the ldap search
require_group	string	False , True		This is not an Ansible boolean but a string that will be pushed into the configuration file,
group_base_dn	string		ou=Groups,dc=example,dc=com	Precise the group to look for. Required if require_group is set to "True"
group_search_filter	string		((cn=developers)(cn=artists))	Precise valid groups
verify_client_cert	string	none , optional , require	client-cert-not-required	In OpenVPN 2.4+ client-cert-not-required is deprecated. Use verify-client-cert instead.

Dependencies

Does not depend on any other roles

Example Playbook

- hosts: vpn
  gather_facts: true
  roles:
    - {role: kyl191.openvpn, clients: [client1, client2],
                        openvpn_port: 4300}

Note: As the role will need to know the remote used platform (32 or 64 bits), you must set gather_facts to true in your play.

License

GPLv2

Author Information

Written by Kyle Lexmond