# JWT Authentication Setup - Complete

**Last Updated:** 2026-01-31  
**Document Version:** 1.0  
**Status:** Active Documentation

---

**Date**: 2025-12-26  
**Status**: ✅ **FULLY OPERATIONAL**

---

## ✅ Setup Complete

JWT authentication has been successfully configured for the Permissioned RPC endpoints on VMID 2501.

### Endpoints Configured

| Endpoint | VMID | IP | Authentication | Status |
|----------|------|-----|----------------|--------|
| `https://rpc-http-prv.d-bis.org` | 2501 | 192.168.11.251 | ✅ JWT Required | ✅ Active |
| `wss://rpc-ws-prv.d-bis.org` | 2501 | 192.168.11.251 | ✅ JWT Required | ✅ Active |
| `https://rpc-http-pub.d-bis.org` | 2502 | 192.168.11.252 | ❌ No Auth | ✅ Active |
| `wss://rpc-ws-pub.d-bis.org` | 2502 | 192.168.11.252 | ❌ No Auth | ✅ Active |

---

## 🔑 JWT Secret

**Location**: `/etc/nginx/jwt_secret` on VMID 2501  
**Secret**: `UMW58gEniB9Y75yNmw0X9hI+ycg1K+d1TG8VdB6TqX0=`

⚠️ **IMPORTANT**: Keep this secret secure. All JWT tokens are signed with this secret.

---

## 🚀 Quick Start

### 1. Generate a JWT Token

```bash
cd /home/intlc/projects/proxmox
./scripts/generate-jwt-token.sh [username] [expiry_days]
```

**Example:**
```bash
./scripts/generate-jwt-token.sh my-app 30
```

### 2. Use the Token

**HTTP RPC:**
```bash
curl -k \
  -H "Authorization: Bearer YOUR_TOKEN_HERE" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc-http-prv.d-bis.org
```

**WebSocket RPC:**
```javascript
const ws = new WebSocket('wss://rpc-ws-prv.d-bis.org', {
  headers: {
    'Authorization': 'Bearer YOUR_TOKEN_HERE'
  }
});
```

### 3. Test Without Token (Should Fail)

```bash
curl -k \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc-http-prv.d-bis.org
```

**Expected Response:**
```json
{"jsonrpc":"2.0","error":{"code":-32000,"message":"Unauthorized. Missing or invalid JWT token. Use: Authorization: Bearer <token>"},"id":null}
```

---

## 📋 Services Status

### VMID 2501 Services

- ✅ **Nginx**: Active and running
- ✅ **JWT Validator Service**: Active on port 8888
- ✅ **Besu RPC**: Running on ports 8545 (HTTP) and 8546 (WebSocket)

### Check Status

```bash
ssh root@192.168.11.10 "pct exec 2501 -- systemctl status nginx jwt-validator"
```

---

## 🔧 Configuration Files

### Nginx Configuration
- **Location**: `/etc/nginx/sites-available/rpc-perm`
- **Enabled**: `/etc/nginx/sites-enabled/rpc-perm`

### JWT Validator Service
- **Script**: `/usr/local/bin/jwt-validator-http.py`
- **Service**: `/etc/systemd/system/jwt-validator.service`
- **Port**: 8888 (internal only, 127.0.0.1)

### JWT Secret
- **Location**: `/etc/nginx/jwt_secret`
- **Permissions**: 640 (readable by root and www-data group)

---

## 🧪 Testing

### Test Health Endpoint (No Auth Required)

```bash
curl -k https://rpc-http-prv.d-bis.org/health
# Expected: healthy
```

### Test with Valid Token

```bash
# Generate token
TOKEN=$(./scripts/generate-jwt-token.sh test-user 365 | grep "Token:" | tail -1 | awk '{print $2}')

# Test HTTP endpoint
curl -k \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc-http-prv.d-bis.org

# Expected: {"jsonrpc":"2.0","id":1,"result":"0x8a"}
```

### Test with Invalid Token

```bash
curl -k \
  -H "Authorization: Bearer invalid-token" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc-http-prv.d-bis.org

# Expected: 401 Unauthorized
```

---

## 🔄 Token Management

### Generate New Token

```bash
./scripts/generate-jwt-token.sh [username] [expiry_days]
```

### Token Structure

JWT tokens contain:
- **Header**: Algorithm (HS256) and type (JWT)
- **Payload**: 
  - `sub`: Username/subject
  - `iat`: Issued at timestamp
  - `exp`: Expiration timestamp
- **Signature**: HMAC-SHA256 signature

### Token Expiry

Tokens expire after the specified number of days. To generate a new token:

```bash
./scripts/generate-jwt-token.sh username days
```

### Revoke All Tokens

To revoke all existing tokens, generate a new JWT secret:

```bash
ssh root@192.168.11.10 "pct exec 2501 -- openssl rand -base64 32 > /etc/nginx/jwt_secret"
ssh root@192.168.11.10 "pct exec 2501 -- chmod 640 /etc/nginx/jwt_secret && chgrp www-data /etc/nginx/jwt_secret"
ssh root@192.168.11.10 "pct exec 2501 -- systemctl restart jwt-validator"
```

Then generate new tokens for authorized users.

---

## 🌐 DNS Configuration

### Required DNS Records

Ensure these DNS records are configured in Cloudflare:

| Type | Name | Target | Proxy | Notes |
|------|------|--------|-------|-------|
| A | `rpc-http-prv` | `192.168.11.251` | 🟠 Proxied | Permissioned HTTP RPC |
| A | `rpc-ws-prv` | `192.168.11.251` | 🟠 Proxied | Permissioned WebSocket RPC |
| A | `rpc-http-pub` | `192.168.11.252` | 🟠 Proxied | Public HTTP RPC |
| A | `rpc-ws-pub` | `192.168.11.252` | 🟠 Proxied | Public WebSocket RPC |

### Verify DNS

```bash
# Check DNS resolution
dig rpc-http-prv.d-bis.org
nslookup rpc-http-prv.d-bis.org
```

---

## 🔍 Troubleshooting

### 401 Unauthorized

**Issue**: Token is missing or invalid

**Solutions**:
1. Check Authorization header format: `Authorization: Bearer <token>`
2. Verify token hasn't expired
3. Generate a new token
4. Ensure token matches the current JWT secret

### 500 Internal Server Error

**Issue**: JWT validation service not responding

**Solutions**:
```bash
# Check service status
ssh root@192.168.11.10 "pct exec 2501 -- systemctl status jwt-validator"

# Check logs
ssh root@192.168.11.10 "pct exec 2501 -- journalctl -u jwt-validator -n 20"

# Restart service
ssh root@192.168.11.10 "pct exec 2501 -- systemctl restart jwt-validator"
```

### Connection Refused

**Issue**: Service not listening on port 8888

**Solutions**:
```bash
# Check if service is running
ssh root@192.168.11.10 "pct exec 2501 -- ss -tlnp | grep 8888"

# Check JWT secret permissions
ssh root@192.168.11.10 "pct exec 2501 -- ls -la /etc/nginx/jwt_secret"

# Fix permissions if needed
ssh root@192.168.11.10 "pct exec 2501 -- chmod 640 /etc/nginx/jwt_secret && chgrp www-data /etc/nginx/jwt_secret"
```

### Nginx Configuration Errors

**Issue**: Nginx fails to start or reload

**Solutions**:
```bash
# Test configuration
ssh root@192.168.11.10 "pct exec 2501 -- nginx -t"

# Check error logs
ssh root@192.168.11.10 "pct exec 2501 -- tail -20 /var/log/nginx/rpc-http-prv-error.log"

# Reload nginx
ssh root@192.168.11.10 "pct exec 2501 -- systemctl reload nginx"
```

---

## 📊 Monitoring

### View Access Logs

```bash
# HTTP access logs
ssh root@192.168.11.10 "pct exec 2501 -- tail -f /var/log/nginx/rpc-http-prv-access.log"

# WebSocket access logs
ssh root@192.168.11.10 "pct exec 2501 -- tail -f /var/log/nginx/rpc-ws-prv-access.log"

# Error logs
ssh root@192.168.11.10 "pct exec 2501 -- tail -f /var/log/nginx/rpc-http-prv-error.log"
```

### Monitor JWT Validator Service

```bash
ssh root@192.168.11.10 "pct exec 2501 -- journalctl -u jwt-validator -f"
```

---

## 🔐 Security Best Practices

1. **Keep JWT Secret Secure**
   - Store in secure location
   - Don't commit to version control
   - Rotate periodically

2. **Set Appropriate Token Expiry**
   - Use short expiry for high-security applications
   - Use longer expiry for trusted services
   - Regenerate tokens when compromised

3. **Monitor Access**
   - Review access logs regularly
   - Watch for unauthorized access attempts
   - Set up alerts for suspicious activity

4. **Use HTTPS Only**
   - All endpoints use HTTPS (port 443)
   - Never send tokens over unencrypted connections

5. **Rate Limiting** (Future Enhancement)
   - Consider adding rate limiting to prevent abuse
   - Configure per-user or per-IP limits

---

## 📚 Related Documentation

- [RPC_JWT_AUTHENTICATION.md](RPC_JWT_AUTHENTICATION.md) - Detailed JWT authentication guide
- [RPC_DNS_CONFIGURATION.md](RPC_DNS_CONFIGURATION.md) - DNS setup and configuration
- [BESU_RPC_CONFIGURATION_FIXED.md](../05-network/BESU_RPC_CONFIGURATION_FIXED.md) - Besu RPC node configuration

---

## ✅ Verification Checklist

- [x] JWT authentication configured on VMID 2501
- [x] JWT validator service running on port 8888
- [x] Nginx configured with auth_request
- [x] JWT secret generated and secured
- [x] Token generation script working
- [x] Valid tokens allow access
- [x] Invalid tokens are rejected
- [x] Health endpoint accessible without auth
- [x] Documentation complete

---

**Last Updated**: 2025-12-26  
**Status**: ✅ **PRODUCTION READY**