V11 SP8

Blocking External Interface Connections

You can protect your computer from undesired remote connections. For each client, create the file InterfaceBlacklist.txt under the Software_Installation_Path/Base folder and specify the IP addresses of external interface connections that must be blacklisted. When a new connection is initiated, the software consults the Interface Blacklist and drops the connection if it is initiated from a blacklisted external address.

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 InterfaceBlacklist.txt.
  3. Add the IP addresses of the external computers from which you wish to block connections, one IP address 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 InterfaceBlacklist.txt.

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