Blocking Local Interface Connections

You can also protect your computer from undesired connections to local interfaces. For each client, create the file LocalInterfaceBlacklist.txt under Software_Installation_Path/Base folder and specify the list IP addresses or hostnames of local interfaces to which connections must be blocked. When there is a new incoming connection, the local interface to which the connection arrived is checked against this list and if found, the connection is dropped immediately without any further processing.

This file can be modified at any time; you must recycle the services for the changes to take effect. The feature is not enabled if this file is not present, or empty.


  1. Stop all services on the computer.
  2. In the Software_Installation_Path/Base folder, create a text file LocalInterfaceBlacklist.txt.
  3. Add the IP addresses (or host names) to which connections must be blocked, one IP address (or hostname) per line. Note that wild characters are not supported. For example, an entry like 172.19.*.* cannot be resolved.

    To allow connections from a computer, remove the corresponding IP address from LocalInterfaceBlacklist.txt.

  4. Connections from IP addresses listed in the LocalInterfaceBlacklist.txt file are blocked.