Enabling "File Inspection" in some cases will block non-malicious files. Some types of files include:
- Password-protected files
- Potentially Unwanted Application (Corrupt) files
These files are blocked by Umbrella because they cannot be decompressed and scanned by our anti-virus tool. Password-protected files might appear blocked under the "Protected Archive" category. Corrupted files could include files that have encrypted content, have archived contents that cannot be extracted, have invalid compressed data or an invalid archive header, or is simply compressed or archived in an unsupported format. While these files may not be malicious, Umbrella will block them by default as a precaution as the files cannot be scanned.
If you know of a non-malicious file that as been blocked because of one of the reasons above, you can work around this by adding a rule that allows the trusted destination, and click "Override Security" to bypass the security settings for that destination:
To view a list of the files that's potentially blocked, login to the Reports section on your Dashboard. The 'Action' column of the Activity Search will report the file blocked as "Protected Archive" or "Potentially Unwanted Application (Corrupt)".
Note that by allowing the destination and overriding the security features, any file (including any files that may include malware) coming from the destination will bypass the Umbrella security settings. Please use this workaround with caution to avoid accidental download of harmful files.