.NPFX File Extension
File TypeNorton Internet Security Firewall Settings File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an NPFX 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.