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NPMPLUS_NOT_REACHABLE.md

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+# NPMplus Not Reachable - Critical Issue
+
+**Date**: 2026-01-21  
+**Issue**: NPMplus (192.168.11.166) is not reachable from internal network
+
+---
+
+## Problem
+
+Testing shows:
+- ❌ `curl http://192.168.11.166` → Connection refused
+- ❌ `curl https://192.168.11.166` → Connection refused
+- ❌ Port 80: NOT REACHABLE
+- ❌ Port 443: NOT REACHABLE
+
+**This is a critical issue** - NPMplus itself is not accessible.
+
+---
+
+## Possible Causes
+
+### 1. NPMplus Container Not Running
+- Container may have stopped
+- Docker service may have stopped
+
+### 2. NPMplus Not Listening on Ports
+- Nginx inside container may have stopped
+- Ports may not be bound correctly
+
+### 3. Network/Firewall Issue
+- Container network configuration issue
+- Firewall blocking access to container IP
+
+### 4. IP Address Changed
+- Container IP may have changed
+- DHCP may have assigned different IP
+
+---
+
+## Diagnosis Steps
+
+### Step 1: Check Container Status
+
+```bash
+ssh root@r630-01
+pct status 10233
+```
+
+**Expected**: `status: running`
+
+### Step 2: Check Docker Container
+
+```bash
+pct exec 10233 -- docker ps | grep npmplus
+```
+
+**Expected**: Container should be running and healthy
+
+### Step 3: Check Listening Ports
+
+```bash
+pct exec 10233 -- ss -tlnp | grep -E ":80 |:443 "
+```
+
+**Expected**: Should show ports 80 and 443 listening
+
+### Step 4: Check Container IP
+
+```bash
+pct exec 10233 -- ip addr show | grep "inet "
+```
+
+**Expected**: Should show 192.168.11.166
+
+### Step 5: Test from Container Itself
+
+```bash
+pct exec 10233 -- curl -I http://localhost:80
+pct exec 10233 -- curl -I https://localhost:443 -k
+```
+
+**Expected**: Should return HTTP response
+
+---
+
+## Quick Fixes
+
+### If Container is Stopped
+
+```bash
+ssh root@r630-01
+pct start 10233
+sleep 10
+pct status 10233
+```
+
+### If Docker Container is Stopped
+
+```bash
+pct exec 10233 -- docker ps -a | grep npmplus
+pct exec 10233 -- docker start npmplus
+```
+
+### If Nginx is Not Running
+
+```bash
+pct exec 10233 -- docker exec npmplus nginx -t
+pct exec 10233 -- docker exec npmplus nginx -s reload
+```
+
+---
+
+## Verification
+
+After fixes, verify:
+
+```bash
+# From internal network
+curl -v http://192.168.11.166 -H "Host: explorer.d-bis.org"
+curl -v https://192.168.11.166 -H "Host: explorer.d-bis.org" -k
+
+# Check ports
+timeout 3 bash -c "echo > /dev/tcp/192.168.11.166/80" && echo "Port 80: OPEN" || echo "Port 80: CLOSED"
+timeout 3 bash -c "echo > /dev/tcp/192.168.11.166/443" && echo "Port 443: OPEN" || echo "Port 443: CLOSED"
+```
+
+---
+
+## Summary
+
+**Critical Issue**: NPMplus is not reachable on its internal IP (192.168.11.166)
+
+**This must be fixed before external access can work.**
+
+Even if port forwarding rules are active, external traffic cannot reach NPMplus if it's not accessible internally.
+
+---
+
+**Status**: ❌ **CRITICAL - NPMplus Not Reachable - Must Fix First**