diff --git a/opnsense_person_alias_manager.py b/opnsense_person_alias_manager.py
new file mode 100644
index 0000000..5311663
--- /dev/null
+++ b/opnsense_person_alias_manager.py
@@ -0,0 +1,175 @@
+#!/usr/bin/env python3
+"""
+OPNsense Person-Based Alias Manager
+Dynamically updates OPNsense firewall aliases based on device assignments in Home Assistant
+"""
+
+import requests
+import sys
+import json
+from urllib3.exceptions import InsecureRequestWarning
+requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
+
+class PersonBasedAliasManager:
+    def __init__(self, opnsense_host: str, api_key: str, api_secret: str):
+        self.host = opnsense_host
+        self.api_key = api_key
+        self.api_secret = api_secret
+        self.base_url = f"https://{opnsense_host}/api"
+        
+    def _make_request(self, endpoint: str, method: str = "GET", data: dict = None):
+        """Make API request to OPNsense"""
+        url = f"{self.base_url}/{endpoint}"
+        
+        try:
+            if method == "GET":
+                response = requests.get(
+                    url,
+                    auth=(self.api_key, self.api_secret),
+                    verify=False,
+                    timeout=10
+                )
+            elif method == "POST":
+                response = requests.post(
+                    url,
+                    auth=(self.api_key, self.api_secret),
+                    json=data,
+                    verify=False,
+                    timeout=10
+                )
+            
+            response.raise_for_status()
+            return response.json()
+        except Exception as e:
+            print(f"Error making request to {endpoint}: {e}")
+            return None
+    
+    def update_person_alias(self, person: str, mac_addresses: list, force_create: bool = False):
+        """Update or create a person's blocked device alias"""
+        alias_name = f"Blocked_{person}"
+        
+        # Filter out empty MAC addresses
+        mac_addresses = [mac for mac in mac_addresses if mac and mac.strip()]
+        
+        if not mac_addresses and not force_create:
+            print(f"No MAC addresses for {person}, skipping alias update")
+            return True
+        
+        # Get existing aliases to check if it exists
+        aliases = self._make_request("firewall/alias/get")
+        
+        if not aliases:
+            print(f"Failed to retrieve aliases")
+            return False
+        
+        # Find the alias UUID if it exists
+        alias_uuid = None
+        alias_data_dict = aliases.get('data', {}).get('alias', {}).get('aliases', {}).get('alias', {})
+        
+        for uuid, alias_info in alias_data_dict.items():
+            if alias_info.get('name') == alias_name:
+                alias_uuid = uuid
+                break
+        
+        # Prepare alias data
+        alias_data = {
+            "alias": {
+                "enabled": "1",
+                "name": alias_name,
+                "type": "mac",
+                "content": "\n".join(mac_addresses) if mac_addresses else "",
+                "description": f"Blocked devices for {person} - Managed by Home Assistant"
+            }
+        }
+        
+        # Create or update
+        if alias_uuid:
+            # Update existing alias
+            endpoint = f"firewall/alias/setItem/{alias_uuid}"
+        else:
+            # Create new alias
+            endpoint = "firewall/alias/setItem"
+        
+        result = self._make_request(endpoint, method="POST", data=alias_data)
+        
+        if result and result.get('result') == 'saved':
+            # Apply changes
+            self._make_request("firewall/alias/reconfigure", method="POST")
+            print(f"✓ Updated alias '{alias_name}' with {len(mac_addresses)} MAC(s)")
+            return True
+        else:
+            print(f"✗ Failed to update alias '{alias_name}'")
+            return False
+
+def main():
+    """
+    Main function - expects JSON input via stdin with device assignments
+    
+    Expected JSON format:
+    {
+        "opnsense_host": "10.0.0.254",
+        "api_key": "...",
+        "api_secret": "...",
+        "people": {
+            "Bella": {
+                "block": true,
+                "devices": [
+                    {"name": "bella_phone", "mac": "aa:bb:cc:dd:ee:ff", "blocked": true},
+                    {"name": "bella_tablet", "mac": "11:22:33:44:55:66", "blocked": false}
+                ]
+            },
+            "Xander": { ... },
+            ...
+        }
+    }
+    """
+    
+    # Read JSON from stdin
+    try:
+        input_data = json.load(sys.stdin)
+    except json.JSONDecodeError as e:
+        print(f"Error parsing JSON input: {e}")
+        sys.exit(1)
+    
+    # Extract configuration
+    opnsense_host = input_data.get('opnsense_host', '10.0.0.254')
+    api_key = input_data.get('api_key')
+    api_secret = input_data.get('api_secret')
+    people = input_data.get('people', {})
+    
+    if not api_key or not api_secret:
+        print("Error: API key and secret are required")
+        sys.exit(1)
+    
+    # Initialize manager
+    manager = PersonBasedAliasManager(opnsense_host, api_key, api_secret)
+    
+    # Update aliases for each person
+    success_count = 0
+    total_count = 0
+    
+    for person, person_data in people.items():
+        total_count += 1
+        
+        # Get blocked MACs for this person
+        blocked_macs = []
+        
+        for device in person_data.get('devices', []):
+            # Add MAC if device is blocked OR if person-level block is enabled
+            if device.get('blocked') or person_data.get('block'):
+                mac = device.get('mac')
+                if mac:
+                    blocked_macs.append(mac)
+        
+        # Update the alias
+        if manager.update_person_alias(person, blocked_macs, force_create=True):
+            success_count += 1
+    
+    print(f"\n{'='*60}")
+    print(f"Updated {success_count}/{total_count} person aliases")
+    print(f"{'='*60}")
+    
+    sys.exit(0 if success_count == total_count else 1)
+
+if __name__ == "__main__":
+    main()