diff --git a/config.yaml.example b/config.yaml.example
index a594677..c4b0546 100644
--- a/config.yaml.example
+++ b/config.yaml.example
@@ -34,6 +34,13 @@ repeater:
   # Recommended: 10 hours for typical deployments
   send_advert_interval_hours: 10
 
+# Mesh Network Configuration
+mesh:
+  # Global flood policy - controls whether the repeater allows or denies flooding by default
+  # true = allow flooding globally, false = deny flooding globally
+  # Individual transport keys can override this setting
+  global_flood_allow: false
+
 radio:
   # Frequency in Hz (869.618 MHz for EU)
   frequency: 869618000
diff --git a/repeater/config.py b/repeater/config.py
index ffad780..4716bf5 100644
--- a/repeater/config.py
+++ b/repeater/config.py
@@ -45,6 +45,70 @@ def load_config(config_path: Optional[str] = None) -> Dict[str, Any]:
     return config
 
 
+def save_config(config_data: Dict[str, Any], config_path: Optional[str] = None) -> bool:
+    """
+    Save configuration to YAML file.
+    
+    Args:
+        config_data: Configuration dictionary to save
+        config_path: Path to config file (uses default if None)
+        
+    Returns:
+        True if successful, False otherwise
+    """
+    if config_path is None:
+        config_path = os.getenv("PYMC_REPEATER_CONFIG", "/etc/pymc_repeater/config.yaml")
+    
+    try:
+        # Create backup of existing config
+        config_file = Path(config_path)
+        if config_file.exists():
+            backup_path = config_file.with_suffix('.yaml.backup')
+            config_file.rename(backup_path)
+            logger.info(f"Created backup at {backup_path}")
+        
+        # Save new config
+        with open(config_path, 'w') as f:
+            yaml.safe_dump(config_data, f, default_flow_style=False, sort_keys=False)
+        
+        logger.info(f"Saved configuration to {config_path}")
+        return True
+        
+    except Exception as e:
+        logger.error(f"Failed to save configuration: {e}")
+        return False
+
+
+def update_global_flood_policy(allow: bool, config_path: Optional[str] = None) -> bool:
+    """
+    Update the global flood policy in the configuration.
+    
+    Args:
+        allow: True to allow flooding globally, False to deny
+        config_path: Path to config file (uses default if None)
+        
+    Returns:
+        True if successful, False otherwise
+    """
+    try:
+        # Load current config
+        config = load_config(config_path)
+        
+        # Ensure mesh section exists
+        if "mesh" not in config:
+            config["mesh"] = {}
+        
+        # Set global flood policy
+        config["mesh"]["global_flood_allow"] = allow
+        
+        # Save updated config
+        return save_config(config, config_path)
+        
+    except Exception as e:
+        logger.error(f"Failed to update global flood policy: {e}")
+        return False
+
+
 def _load_or_create_identity_key(path: Optional[str] = None) -> bytes:
 
     if path is None:
diff --git a/repeater/web/api_endpoints.py b/repeater/web/api_endpoints.py
index 0e3e91b..cf60534 100644
--- a/repeater/web/api_endpoints.py
+++ b/repeater/web/api_endpoints.py
@@ -5,6 +5,7 @@ from datetime import datetime
 from typing import Callable, Optional
 import cherrypy
 from repeater import __version__
+from repeater.config import update_global_flood_policy
 from .cad_calibration_engine import CADCalibrationEngine
 
 logger = logging.getLogger("HTTPServer")
@@ -804,4 +805,42 @@ class APIEndpoints:
                 return self._error("Invalid key_id format")
             except Exception as e:
                 logger.error(f"Error deleting transport key: {e}")
-                return self._error(e)
\ No newline at end of file
+                return self._error(e)
+
+    @cherrypy.expose
+    @cors_enabled
+    @cherrypy.tools.json_in()
+    def global_flood_policy(self):
+        """
+        Update global flood policy configuration
+        
+        POST /global_flood_policy
+        Body: {"global_flood_allow": true/false}
+        """
+        if cherrypy.request.method == "POST":
+            try:
+                data = cherrypy.request.json or {}
+                global_flood_allow = data.get("global_flood_allow")
+                
+                if global_flood_allow is None:
+                    return self._error("Missing required field: global_flood_allow")
+                
+                if not isinstance(global_flood_allow, bool):
+                    return self._error("global_flood_allow must be a boolean value")
+                
+                # Update the configuration
+                success = update_global_flood_policy(global_flood_allow)
+                
+                if success:
+                    return self._success(
+                        {"global_flood_allow": global_flood_allow},
+                        message=f"Global flood policy updated to {'allow' if global_flood_allow else 'deny'}"
+                    )
+                else:
+                    return self._error("Failed to update global flood policy configuration")
+                    
+            except Exception as e:
+                logger.error(f"Error updating global flood policy: {e}")
+                return self._error(e)
+        else:
+            return self._error("Method not supported")
\ No newline at end of file