# NSG Fix Complete ✅

## Changes Applied

### 1. Removed Subnet NSG from Nginx Subnet
- ✅ Subnet NSG association removed
- ✅ Nginx subnet no longer has subnet-level NSG
- ✅ Only NIC-level NSG remains

### 2. Removed P2P/RPC/Metrics Rules
- ✅ Besu-specific rules removed from Nginx subnet NSG
- ✅ Nginx subnet NSG now only has SSH rule (if any)
- ✅ NIC NSG has correct rules (HTTP/HTTPS/SSH)

## Configuration Changes

### Terraform Variables Added
1. **`subnet_nsg_enabled`** (bool, default: `true`)
   - Controls whether NSG is attached to subnet
   - Set to `false` for Nginx proxy subnet

2. **`enable_besu_rules`** (bool, default: `true`)
   - Controls whether Besu-specific rules are created
   - Set to `false` for Nginx proxy subnet

### Files Modified
1. `terraform/modules/networking-vm/main.tf`
   - Conditional subnet NSG association
   - Dynamic Besu rules (P2P/RPC/Metrics)

2. `terraform/modules/networking-vm/variables.tf`
   - Added `subnet_nsg_enabled` variable
   - Added `enable_besu_rules` variable

3. `terraform/phases/phase1/phase1-main.tf`
   - Updated `networking_admin` module:
     - `subnet_nsg_enabled = false`
     - `enable_besu_rules = false`

## Verification Results

### Subnet NSG
- **Status**: ✅ Detached from Nginx subnet
- **Before**: Had wrong rules (P2P/RPC/Metrics)
- **After**: Not attached (uses NIC-level NSG only)

### NIC NSG
- **Status**: ✅ Attached with correct rules
- **Rules**: HTTP (80), HTTPS (443), SSH (22)
- **Outbound**: Allowed to backend VMs

### Port Accessibility
- **Port 80**: ✅ Accessible
- **Port 443**: ✅ Accessible
- **Cloudflare Tunnel**: ✅ Working

## Impact

### Nginx Proxy
- ✅ Cleaner configuration (single NSG)
- ✅ Correct rules (HTTP/HTTPS/SSH only)
- ✅ No unnecessary Besu rules

### Besu Nodes
- ✅ Unchanged (still have subnet NSG + Besu rules)
- ✅ No impact on backend VMs

## Next Steps

1. ✅ **Terraform Plan**: Completed
2. ✅ **Terraform Apply**: Completed
3. ✅ **Verification**: Completed

## Summary

The NSG configuration has been successfully updated:
- Subnet NSG removed from Nginx subnet
- P2P/RPC/Metrics rules removed
- NIC NSG has correct rules
- Ports 80 and 443 are accessible

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**Status**: ✅ **All Changes Applied Successfully**

The Nginx proxy now uses only the NIC-level NSG with correct rules (HTTP/HTTPS/SSH), and the subnet NSG with unnecessary Besu rules has been removed.