# Public IP Connectivity Test Results

**Date**: 2026-01-21  
**Public IP**: 76.53.10.36  
**Test Method**: Direct IP access (bypassing DNS)

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## Test Results

### Port Connectivity Tests

#### Port 80 (HTTP)
- **Test**: Direct connection to 76.53.10.36:80
- **Result**: [See test output below]
- **Status**: ⚠️ **TIMEOUT** or ✅ **CONNECTED**

#### Port 443 (HTTPS)
- **Test**: Direct connection to 76.53.10.36:443
- **Result**: [See test output below]
- **Status**: ⚠️ **TIMEOUT** or ✅ **CONNECTED**

### HTTP/HTTPS Response Tests

#### HTTP Direct IP
- **Test**: `curl http://76.53.10.36`
- **Result**: [See test output below]

#### HTTPS Direct IP
- **Test**: `curl https://76.53.10.36`
- **Result**: [See test output below]

#### HTTP with Host Header
- **Test**: `curl -H "Host: explorer.d-bis.org" http://76.53.10.36`
- **Result**: [See test output below]
- **Purpose**: Tests if NPMplus responds to correct Host header

#### HTTPS with Host Header
- **Test**: `curl -H "Host: explorer.d-bis.org" https://76.53.10.36`
- **Result**: [See test output below]
- **Purpose**: Tests if NPMplus responds to correct Host header

### Network Connectivity Tests

#### Ping Test
- **Test**: `ping -c 4 76.53.10.36`
- **Result**: [See test output below]
- **Purpose**: Verify basic network connectivity

#### Traceroute
- **Test**: `traceroute 76.53.10.36`
- **Result**: [See test output below]
- **Purpose**: See network path to public IP

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## Analysis

### If Ports Are Closed/Timeout

**Possible Causes:**
1. **UDM Pro Firewall Blocking**
   - Port forwarding rules not enabled
   - Firewall rules blocking WAN → LAN
   - Rule order issue (block before allow)

2. **ISP Blocking**
   - ISP blocking ports 80/443
   - Common for residential connections
   - May require business connection

3. **Network Routing**
   - Traffic not reaching UDM Pro
   - WAN interface not receiving traffic
   - ISP routing issue

### If Ports Are Open But No Response

**Possible Causes:**
1. **NPMplus Not Responding**
   - Service not running
   - Wrong Host header
   - SSL certificate issue

2. **Port Forwarding Not Working**
   - Rules configured but not active
   - Wrong internal IP
   - Interface mismatch

### If Ports Are Open and Responding

**Status**: ✅ **Working!**
- External access is functional
- Issue may be DNS-related
- Or browser cache/SSL issue

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## Next Steps Based on Results

### If Timeout/Closed:
1. Check UDM Pro port forwarding rules are enabled
2. Verify firewall rule order
3. Test from different network (mobile hotspot)
4. Check ISP restrictions

### If Open But No Response:
1. Verify NPMplus is running
2. Check Host header requirement
3. Verify port forwarding destination IP
4. Check NPMplus logs

### If Working:
1. Clear browser cache
2. Check DNS resolution
3. Test SSL certificate
4. Verify domain configuration

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## Expected Behavior

**If everything is working correctly:**
- Port 80: Should respond with HTTP 301 redirect to HTTPS
- Port 443: Should respond with HTTP 200 and explorer frontend
- Host header: Should route to correct backend (VMID 5000)

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**Test Results**: [See command output below]