Git initial commit

LICENSE

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+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# cloud-vpn
+
+Ansible role to provide an OpenVPN server; relies on easyrsa for certificates.

defaults/main.yml

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+---
+cloud_apps: /opt
+cloud_storage: /opt/storage
+cloud_stage: prod
+cloud_update: false
+
+vpn_internal_dns: 1.1.1.1
+
+vpn_allow_adjacent_client_traffic: True
+vpn_keepalive: 25
+
+vpn_gateway_clientfolder: /etc/wireguard/clients
+vpn_gateway_interface: eth0
+vpn_gateway_host: my-wireguard-server.tld
+vpn_gateway_port: 51820
+vpn_gateway_net_prefix: 10.10.123
+vpn_gateway_net_cidr: 28
+vpn_gateway_public_key: your-public-key
+vpn_gateway_private_key: your-privat-key
+
+vpn_gateway_forward: []
+#  - server_port: 22
+#    client_port: "{{ ssh_port }}"
+#    client_index: 0
+
+
+vpn_clients: []
+#  - name:
+#    index: 1
+#    private_key:
+#    public_key:

handlers/main.yml

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+---
+- name: restart wireguard service
+  service:
+    name: wg-quick@{{ cloud_name }}
+    state: restarted
+    enabled: yes
+  when: wireguard_installed is defined and not wireguard_installed.changed

meta/main.yml

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+---
+galaxy_info:
+  role_name: vpn
+  namespace: opendevchain
+  author: Lars Hahn
+  company: OpenDevChain
+  license: MIT
+  description: Role to setup a wireguard server.
+  min_ansible_version: 2.7
+  platforms:
+    - name: Debian
+      versions:
+        - 12
+  galaxy_tags:
+    - vpn
+dependencies: []

tasks/main.yml

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+---
+- name: install fail2ban service
+  apt:
+    update_cache: yes
+    state: "{% if cloud_update | bool %}latest{% else %}present{% endif %}"
+    install_recommends: yes
+    pkg: wireguard
+  register: wireguard_installed
+
+- name: setup key files
+  template:
+    src: "etc/wireguard/{{ item }}.j2"
+    dest: "/etc/wireguard/{{ item }}"
+    owner: root
+    mode: 0600
+  loop:
+    - private.key
+    - public.key
+  notify: restart wireguard service
+
+- name: setup wireguard config
+  template:
+    src: "etc/wireguard/wireguard.conf.j2"
+    dest: "/etc/wireguard/{{ cloud_name }}.conf"
+    owner: root
+    mode: 0600
+  notify: restart wireguard service
+
+- name: setup client folder
+  file:
+    state: directory
+    mode: 0600
+    owner: root
+    path: "{{ vpn_gateway_clientfolder }}"
+
+- name: setup client configs
+  template:
+    src: "etc/wireguard/clients/wireguard-client.conf.j2"
+    dest: "{{ vpn_gateway_clientfolder }}/{{ vpn_client.name }}.conf"
+    owner: root
+    mode: 0600
+  loop: "{{ vpn_clients }}"
+  loop_control:
+    loop_var: vpn_client
+    label: "{{ vpn_client.name }}"
+
+
+- name: enable wireguard systemd unit
+  systemd:
+    name: wg-quick@{{ cloud_name }}
+    enabled: yes
+    daemon_reload: yes
+    state: started

templates/etc/wireguard/clients/wireguard-client.conf.j2

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+[Interface]
+Address = {{ vpn_gateway_net_prefix }}.{{ vpn_client.index }}/32
+PrivateKey = {{ vpn_client.private_key }}
+DNS = {{ vpn_internal_dns }}
+
+[Peer]
+PublicKey = {{ vpn_gateway_public_key }}
+Endpoint = {{ vpn_gateway_host }}:{{ vpn_gateway_port }}
+AllowedIPs = {{ vpn_gateway_net_prefix }}.1/{% if vpn_allow_adjacent_client_traffic %}{{ vpn_gateway_net_cidr }}{% else %}32{% endif %}
+
+PersistentKeepalive = {{ vpn_keepalive }}

templates/etc/wireguard/private.key.j2

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+{{ vpn_gateway_private_key }}

templates/etc/wireguard/public.key.j2

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+{{ vpn_gateway_public_key }}

templates/etc/wireguard/wireguard.conf.j2

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+[Interface]
+Address = {{ vpn_gateway_net_prefix }}.1/{{ vpn_gateway_net_cidr }}
+ListenPort = {{ vpn_gateway_port }}
+PrivateKey = {{ vpn_gateway_private_key }}
+
+{% if vpn_gateway_forward is defined and vpn_gateway_forward | length > 0 %}
+PreUp = sysctl -w net.ipv4.ip_forward=1
+PreUp = sysctl -w net.ipv6.conf.all.forwarding=1
+
+{% for config in vpn_gateway_forward %}
+PreUp = iptables -t nat -A PREROUTING -i {{ vpn_gateway_interface }} -p {{ config.protocol | default('tcp') }} --dport {{ config.server_port }} -j DNAT --to-destination {{ vpn_gateway_net_prefix }}.{{ config.client_index }}:{{ config.client_port }}
+PostDown = iptables -t nat -D PREROUTING -i {{ vpn_gateway_interface }} -p {{ config.protocol | default('tcp') }} --dport {{ config.server_port }} -j DNAT --to-destination {{ vpn_gateway_net_prefix }}.{{ config.client_index }}:{{ config.client_port }}
+
+{% endfor %}
+PreUp = iptables -t nat -A POSTROUTING -o {{ cloud_name }} -j MASQUERADE
+PostDown = iptables -t nat -D POSTROUTING -o {{ cloud_name }} -j MASQUERADE
+{% endif %}
+
+{% for vpn_client in vpn_clients %}
+## vpn {{ cloud_name }} - {{ vpn_client.name }} ##
+[Peer]
+PublicKey = {{ vpn_client.public_key }}
+AllowedIPs = {{ vpn_gateway_net_prefix }}.{{ vpn_client.index }}/32
+
+{% endfor %}