LanguageDUN
Dial-Up Network config file
File type: Configuration file
Files with dun extension were used for a Dial-Up Network service in Windows OS and Internet Explorer. They include saved configuration data.
What is dun file?
File type category:
Configuration file
Date updated: June 27, 2025
The dun file extension was related to a Dial-Up Network service in the Windows operating system and Internet Explorer. This service allows you to use your computer to access a network via a dial-up (phone) connection. Many different protocols are supported.
A *.dun file contains saved configuration for the dial-up network.
Suggested software to open dun file:
Associated software actions with the dun file
Software apps that manage settings for dun files:
Microsoft Internet Explorer (Microsoft Windows)
Software applications that handle other tasks involving dun files:
Microsoft Internet Explorer (Microsoft Windows)
Microsoft Windows (Microsoft Windows)