A cfu file extension is related to the Symantec Client Firewall and used for its policy files.
CFU file extension - Symantec Client Firewall policy data
What is cfu file? How to open cfu files?
File type specification:
The cfu file extension is associated with the Client Firewall a tool for Microsoft Windows developed by Symantec.
The cfu file stores some kind of policy data.
The Symantec Client Firewall seems to be obsolete product.
Example: Ad_rpc.cfu
This cfu file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.