Having problems opening a CNF file?

We have programs that can open or convert your CNF files.

Opening CNF files

Did your computer fail to open a CNF file? We explain what CNF files are and recommend software that we know can open or convert your CNF files.

What is a CNF file?

Files that contain the .cnf file extension are most commonly associated with telnet connection files. These CNF files store the information that the computer uses in order to make a telnet connection.

Files with the .cnf extension may contain the name of the telnet server that is being used as well as the username and the password of the telnet user. The CNF file that is used by the server software works like a shortcut, allowing users quick access to commonly-used telnet sessions.

Lotus 1-2-3 has also been known to use the .cnf file suffix. These CNF files contain the configuration files that are referenced during the use of the Lotus 1-2-3 application.

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About File Extension CNF

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CNF file format or software that uses files with the CNF suffix, please do get in touch - we would love hearing from you.