The File Extensions Database

.NPFX File Extension

  • Developer by: Symantec
  • Category: Settings Files

What is an .NPFX file?

.NPFX is Norton Internet Security Firewall Settings File

Settings file created by the firewall program included with Symantec Norton Internet Security for Mac; stores firewall connection blocking settings such as IP, port, service, and application filters; used for migrating firewall settings from one computer to another.

Programs that open Norton Internet Security Firewall Settings File
Symantec Norton Internet Security 5

How to solve problems with NPFX files

  • Associate the NPFX file extension with the correct application. On :
    Windows: Right click on any NPFX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.NPFX files". Mac: Right click (or Ctrl-click) the NPFX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .NPFX is Norton Internet Security Firewall Settings File. Because only the current version supports the latest NPFX file format. Search, therefore, e.g. on the Symantec manufacturer website after an available .NPFX is Norton Internet Security Firewall Settings File update.
  • To make sure that your NPFX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.