Blueprint: Pangolin identity-aware VPN and proxy server

blueprints/pangolin/README.md

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+# Pangolin Dokploy Template
+
+> **Zero-trust identity-aware reverse proxy and VPN server for secure remote access**
+
+- 🔐 **Identity-Aware Access**: Enforce authentication before reaching any resource
+- 🌐 **WireGuard VPN Tunnels**: Connect remote sites and clients with modern WireGuard
+- 🔄 **Dynamic Reverse Proxy**: Built-in Traefik for automatic TLS and HTTP routing
+- 👥 **Multi-Org Support**: Isolated organizations with role-based access control
+- 🔑 **SSO / OIDC Integration**: Connect to Authelia, Authentik, Keycloak, and more
+- 🛡️ **Zero-Trust Architecture**: No implicit trust — every request is authenticated
+- 📊 **Audit Logging**: Track all access and connections
+
+**Official Documentation**: https://docs.pangolin.net/
+
+---
+
+## Architecture
+
+```
+Internet
+    │
+    ├── 443 (HTTPS) ──► Gerbil + Traefik ──► Tunneled Services
+    ├── 51820 (UDP) ──► Gerbil (WireGuard) ──► VPN Clients
+    │
+    └── Dokploy Traefik ──► Pangolin Dashboard (Admin UI)
+
+┌─────────────────────────────────────────────────────┐
+│                  Pangolin Stack                     │
+│                                                     │
+│  ┌────────────┐    ┌─────────┐    ┌─────────────┐  │
+│  │  Pangolin  │◄───│ Gerbil  │◄───│   Traefik   │  │
+│  │  (Control) │    │  (VPN)  │    │  (Proxy)    │  │
+│  │ Port 3001  │    │UDP 51820│    │ Port 80/443 │  │
+│  │ Port 3000  │    │         │    │             │  │
+│  └────────────┘    └─────────┘    └─────────────┘  │
+│         │                                           │
+│  ┌──────▼──────┐                                    │
+│  │  SQLite DB  │ (persisted in pangolin-config volume)│
+│  └─────────────┘                                    │
+└─────────────────────────────────────────────────────┘
+```
+
+**Service Type**: Multi-service stack (Pangolin + Gerbil + Traefik)  
+**Database**: Self-contained SQLite (in `/app/config/db`)  
+**VPN**: WireGuard via Gerbil  
+**Proxy**: Embedded Traefik instance for tunneled services  
+
+---
+
+## Prerequisites
+
+1. **Dedicated server or VPS** (recommended — Pangolin uses ports 80, 443, 51820)
+2. **DNS configuration**:
+   - `pangolin.example.com` → Server IP (admin dashboard)
+   - `*.example.com` → Server IP (wildcard for tunneled services)
+3. **Firewall rules**: Open ports `443/tcp`, `80/tcp`, `51820/udp`
+4. **Dokploy** installed and running
+
+> **⚠️ Port Conflict Warning**: Pangolin's embedded Traefik uses ports 80 and 443.
+> If Dokploy's Traefik already uses these ports on the same host, you must either:
+> - Deploy Pangolin on a **dedicated server**
+> - Change `HTTP_PROXY_PORT` and `HTTPS_PROXY_PORT` to alternate values (e.g., 8080, 8443)
+
+---
+
+## Quick Start
+
+### 1. Configure DNS
+
+Before deploying, set up DNS records:
+
+```
+# Admin dashboard
+pangolin.example.com     A    <your-server-ip>
+
+# Wildcard for tunneled services
+*.example.com            A    <your-server-ip>
+```
+
+### 2. Deploy Template
+
+In Dokploy:
+1. Select **"Add New Template"**
+2. Choose **"Pangolin"**
+3. Fill in the required variables (see [Configuration](#configuration) below)
+4. Deploy
+
+### 3. Complete Initial Setup
+
+Navigate to `https://pangolin.example.com/auth/initial-setup` and:
+1. Confirm admin email and password
+2. Configure your organization name
+3. Verify DNS is working
+
+### 4. Create Your First Tunnel
+
+1. In Pangolin admin: **Sites** → **Add Site**
+2. Choose **WireGuard** tunnel type
+3. Follow the newt/WireGuard client setup instructions
+4. Add resources behind the tunnel
+
+---
+
+## Configuration
+
+### Required Variables
+
+| Variable | Description | Example |
+|----------|-------------|---------|
+| `pangolin_domain` | Admin dashboard domain | `pangolin.example.com` |
+| `base_domain` | Base domain for tunneled services | `example.com` |
+| `admin_email` | Initial admin email address | `admin@example.com` |
+| `admin_password` | Initial admin password (auto-generated) | *(generated)* |
+| `letsencrypt_email` | Email for Let's Encrypt certificates | `admin@example.com` |
+| `app_secret` | Application secret key (auto-generated) | *(generated)* |
+| `resource_access_secret` | Resource token secret (auto-generated) | *(generated)* |
+
+### Optional Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `wireguard_port` | `51820` | WireGuard VPN UDP port |
+| `https_proxy_port` | `443` | HTTPS port for tunneled services |
+| `http_proxy_port` | `80` | HTTP port (redirects to HTTPS) |
+| `smtp_host` | *(empty)* | SMTP server for email notifications |
+| `smtp_port` | `587` | SMTP port |
+| `smtp_username` | *(empty)* | SMTP username |
+| `smtp_password` | *(empty)* | SMTP password |
+| `smtp_from_email` | *(empty)* | From address for outgoing emails |
+| `log_level` | `info` | Log level: `debug`, `info`, `warn`, `error` |
+
+### Environment Variables (Advanced)
+
+These are set via Dokploy's environment variable injection:
+
+| Variable | Description |
+|----------|-------------|
+| `PANGOLIN_DOMAIN` | Admin dashboard domain |
+| `WIREGUARD_PORT` | WireGuard listen port |
+| `HTTPS_PROXY_PORT` | HTTPS proxy port |
+| `HTTP_PROXY_PORT` | HTTP proxy port |
+
+---
+
+## Identity Provider Setup
+
+Pangolin supports SSO via OpenID Connect (OIDC). Configure in the admin UI under:
+**Settings** → **Identity Providers**
+
+### Authelia
+
+1. In Authelia, create a new OIDC client:
+   ```yaml
+   # authelia/configuration.yml
+   identity_providers:
+     oidc:
+       clients:
+         - id: pangolin
+           description: Pangolin
+           secret: your-client-secret
+           public: false
+           authorization_policy: two_factor
+           redirect_uris:
+             - https://pangolin.example.com/api/v1/auth/oidc/callback
+           scopes:
+             - openid
+             - profile
+             - email
+           grant_types:
+             - authorization_code
+   ```
+2. In Pangolin admin: **Settings** → **Identity Providers** → **Add OIDC**
+3. Enter:
+   - **Issuer URL**: `https://auth.example.com`
+   - **Client ID**: `pangolin`
+   - **Client Secret**: `your-client-secret`
+
+### Authentik
+
+1. In Authentik, create an OAuth2/OIDC provider:
+   - **Redirect URIs**: `https://pangolin.example.com/api/v1/auth/oidc/callback`
+   - **Scopes**: `openid`, `profile`, `email`
+2. Create an Application linked to this provider
+3. In Pangolin admin: **Settings** → **Identity Providers** → **Add OIDC**
+4. Use the Authentik OIDC metadata URL
+
+### Keycloak
+
+1. In Keycloak, create a new client:
+   - **Client ID**: `pangolin`
+   - **Client Protocol**: `openid-connect`
+   - **Valid Redirect URIs**: `https://pangolin.example.com/api/v1/auth/oidc/callback`
+2. Note the client secret from the **Credentials** tab
+3. In Pangolin admin: configure OIDC with Keycloak's realm OIDC endpoint
+
+---
+
+## Networking
+
+### Port Requirements
+
+| Port | Protocol | Purpose | Required |
+|------|----------|---------|----------|
+| `443` | TCP | HTTPS for tunneled services + Let's Encrypt | Yes |
+| `80` | TCP | HTTP → HTTPS redirect + Let's Encrypt challenge | Yes |
+| `51820` | UDP | WireGuard VPN tunnels | Yes |
+
+### Firewall Rules
+
+```bash
+# Open required ports
+ufw allow 80/tcp
+ufw allow 443/tcp
+ufw allow 51820/udp
+
+# Restrict admin dashboard to trusted IPs (recommended)
+ufw allow from <your-ip> to any port 443
+```
+
+### DNS Wildcard Setup
+
+Pangolin creates subdomains for each exposed service:
+
+```
+# All tunneled services use subdomains of base_domain
+api.example.com       → service behind Pangolin tunnel
+app.example.com       → another service
+db-admin.example.com  → protected database UI
+```
+
+---
+
+## Security Considerations
+
+### Credential Management
+
+- ✅ Admin password is auto-generated (32 characters)
+- ✅ App secrets are auto-generated and stored in Dokploy
+- ✅ Change admin password after first login
+- ✅ Enable MFA for admin accounts
+
+### Network Security
+
+- ✅ All traffic encrypted via TLS (Let's Encrypt)
+- ✅ WireGuard provides end-to-end encryption for VPN tunnels
+- ✅ Deploy on a dedicated server to avoid port conflicts
+- ✅ Use firewall to restrict access to management ports
+- ✅ Enable identity provider authentication for zero-trust access
+
+### Secrets Rotation
+
+To rotate secrets:
+1. Update `app_secret` and `resource_access_secret` in Dokploy
+2. Redeploy the stack
+3. Users will need to log in again (sessions invalidated)
+
+---
+
+## Troubleshooting
+
+### Admin Dashboard Not Loading
+
+```bash
+# Check Pangolin is healthy
+docker compose ps
+docker compose logs pangolin
+
+# Verify Traefik routing
+curl -I https://pangolin.example.com
+```
+
+### WireGuard Connection Fails
+
+```bash
+# Check Gerbil is running
+docker compose logs gerbil
+
+# Verify UDP port is open
+nc -u -zv your-server-ip 51820
+
+# Check WireGuard key was generated
+docker compose exec gerbil ls /var/config/key
+```
+
+### Let's Encrypt Certificate Issues
+
+```bash
+# Check Traefik logs
+docker compose logs traefik
+
+# Verify HTTP challenge is reachable
+curl http://your-domain/.well-known/acme-challenge/test
+
+# Common cause: port 80 blocked by firewall
+ufw status
+```
+
+### Services Not Accessible via Tunnel
+
+1. Verify site is connected: Pangolin admin → **Sites** → check status
+2. Check resource configuration: correct target URL
+3. Review access policies: user has permission to access resource
+4. Check Traefik config: `docker compose logs traefik`
+
+---
+
+## Backup
+
+### Critical Data
+
+Back up these named volumes regularly:
+
+| Volume | Contents |
+|--------|----------|
+| `pangolin-config` | SQLite database, WireGuard keys, Pangolin application configuration |
+| `traefik-certs` | Traefik ACME storage (Let's Encrypt certificates) |
+
+```bash
+# Example backup command for pangolin config volume
+docker run --rm \
+  -v pangolin-config:/source:ro \
+  -v /backup:/backup \
+  alpine tar czf /backup/pangolin-config-$(date +%Y%m%d).tar.gz -C /source .
+```
+
+---
+
+## Updating
+
+To update Pangolin:
+1. Check the [Pangolin releases page](https://github.com/fosrl/pangolin/releases)
+2. Update the image reference in `docker-compose.yml`
+3. Also update `gerbil` image to the compatible version
+4. Redeploy in Dokploy
+
+> ⚠️ Always check the release notes for breaking changes before upgrading.
+
+---
+
+## Production Checklist
+
+Before going live:
+
+- [ ] DNS configured: `pangolin.example.com` and `*.example.com` → server IP
+- [ ] Firewall open: ports 80, 443 (TCP), 51820 (UDP)
+- [ ] Admin password changed after first login
+- [ ] MFA enabled on admin account
+- [ ] Let's Encrypt certificates active (check Traefik logs)
+- [ ] SMTP configured (for user invites)
+- [ ] Identity provider configured (optional but recommended)
+- [ ] Volume backup strategy in place
+- [ ] First tunnel tested end-to-end
+
+---
+
+## Support & Resources
+
+- **Official Docs**: https://docs.pangolin.net/
+- **GitHub**: https://github.com/fosrl/pangolin
+- **GitHub Issues**: https://github.com/fosrl/pangolin/issues
+- **Gerbil (tunnel agent)**: https://github.com/fosrl/gerbil
+
+---
+
+## Template Metadata
+
+- **Application**: Pangolin
+- **Image**: `ghcr.io/fosrl/pangolin:sha256-3013a0e89e3259567fd86d23af50fc1c7ad9216ab0693ceb823b01c35e6acb5`
+- **Gerbil**: `ghcr.io/fosrl/gerbil:1.3.0`
+- **Type**: Identity-aware VPN and Proxy Server
+- **Architecture**: Multi-service (Pangolin + Gerbil + Traefik)
+- **Storage**: SQLite in persistent volumes
+- **Networking**: WireGuard VPN + HTTP/HTTPS reverse proxy
+- **Status**: Production-Ready
+
+---
+
+## License
+
+Pangolin is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0)  
+See: https://github.com/fosrl/pangolin/blob/main/LICENSE