Post-Tyranny-Tech-Infrastru.../ansible/roles/nat-gateway/tasks/main.yml

---
# NAT Gateway Configuration
# Enables internet access for private network clients via edge server

- name: Enable IP forwarding
  sysctl:
    name: net.ipv4.ip_forward
    value: '1'
    state: present
    reload: yes
  tags: [nat, gateway]

- name: Install iptables-persistent
  apt:
    name: iptables-persistent
    state: present
    update_cache: yes
  tags: [nat, gateway]

- name: Configure NAT (masquerading) for private network
  iptables:
    table: nat
    chain: POSTROUTING
    out_interface: eth0
    source: 10.0.0.0/16
    jump: MASQUERADE
    comment: NAT for private network clients
  notify: Save iptables rules
  tags: [nat, gateway]

- name: Allow forwarding from private network (in DOCKER-USER chain)
  iptables:
    chain: DOCKER-USER
    in_interface: enp7s0
    out_interface: eth0
    source: 10.0.0.0/16
    jump: ACCEPT
    comment: Allow forwarding from private network
  notify: Save iptables rules
  tags: [nat, gateway]

- name: Allow established connections back to private network (in DOCKER-USER chain)
  iptables:
    chain: DOCKER-USER
    in_interface: eth0
    out_interface: enp7s0
    ctstate: ESTABLISHED,RELATED
    jump: ACCEPT
    comment: Allow established connections to private network
  notify: Save iptables rules
  tags: [nat, gateway]

- name: Return from DOCKER-USER chain for other traffic
  iptables:
    chain: DOCKER-USER
    jump: RETURN
    comment: Let Docker handle other traffic
  notify: Save iptables rules
  tags: [nat, gateway]

- name: Save iptables rules
  shell: |
    iptables-save > /etc/iptables/rules.v4
  args:
    creates: /etc/iptables/rules.v4
  tags: [nat, gateway]
feat: Add infrastructure roles for multi-tenant architecture Add new Ansible roles and configuration for the edge proxy and private network architecture: ## New Roles: - edge-traefik: Edge reverse proxy that routes to private clients - Dynamic routing configuration for multiple clients - SSL termination at the edge - Routes traffic to private IPs (10.0.0.x) - nat-gateway: NAT/gateway configuration for edge server - IP forwarding and masquerading - Allows private network clients to access internet - iptables rules for Docker integration - diun: Docker Image Update Notifier - Monitors containers for available updates - Email notifications via Mailgun - Per-client configuration - kuma: Uptime monitoring integration - Registers HTTP monitors for client services - Automated monitor creation via API - Checks Authentik, Nextcloud, Collabora endpoints ## New Playbooks: - setup-edge.yml: Configure edge server with proxy and NAT ## Configuration: - host_vars: Per-client Ansible configuration (valk, white) - SSH bastion configuration for private IPs - Client-specific secrets file references This enables the scalable multi-tenant architecture where: - Edge server has public IP and routes traffic - Client servers use private IPs only (cost savings) - All traffic flows through edge proxy with SSL termination 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2026-01-20 19:05:51 +01:00			`---`
			`# NAT Gateway Configuration`
			`# Enables internet access for private network clients via edge server`

			`- name: Enable IP forwarding`
			`sysctl:`
			`name: net.ipv4.ip_forward`
			`value: '1'`
			`state: present`
			`reload: yes`
			`tags: [nat, gateway]`

			`- name: Install iptables-persistent`
			`apt:`
			`name: iptables-persistent`
			`state: present`
			`update_cache: yes`
			`tags: [nat, gateway]`

			`- name: Configure NAT (masquerading) for private network`
			`iptables:`
			`table: nat`
			`chain: POSTROUTING`
			`out_interface: eth0`
			`source: 10.0.0.0/16`
			`jump: MASQUERADE`
			`comment: NAT for private network clients`
			`notify: Save iptables rules`
			`tags: [nat, gateway]`

			`- name: Allow forwarding from private network (in DOCKER-USER chain)`
			`iptables:`
			`chain: DOCKER-USER`
			`in_interface: enp7s0`
			`out_interface: eth0`
			`source: 10.0.0.0/16`
			`jump: ACCEPT`
			`comment: Allow forwarding from private network`
			`notify: Save iptables rules`
			`tags: [nat, gateway]`

			`- name: Allow established connections back to private network (in DOCKER-USER chain)`
			`iptables:`
			`chain: DOCKER-USER`
			`in_interface: eth0`
			`out_interface: enp7s0`
			`ctstate: ESTABLISHED,RELATED`
			`jump: ACCEPT`
			`comment: Allow established connections to private network`
			`notify: Save iptables rules`
			`tags: [nat, gateway]`

			`- name: Return from DOCKER-USER chain for other traffic`
			`iptables:`
			`chain: DOCKER-USER`
			`jump: RETURN`
			`comment: Let Docker handle other traffic`
			`notify: Save iptables rules`
			`tags: [nat, gateway]`

			`- name: Save iptables rules`
			`shell: \|`
			`iptables-save > /etc/iptables/rules.v4`
			`args:`
			`creates: /etc/iptables/rules.v4`
			`tags: [nat, gateway]`