Interact with the OS X built-in PF packet filter and Murus

Notification alert allows you also to create filtering rule at network level. These rules are system wide and affect all apps. This feature requires Murus Basic or Murus Pro to be installed, configured and running. So you can add one or more custom rules, or put current IP address in Murus black list or in a new or existing Murus group.
If you have Murus correctly configured then Vallum notification alerts will display the list of services that contain the port involved in current connection. Select a service to manage or unmanage it in Murus Managed Outbound Services.