Can Zscaler block file upload/download by filename, by MIME type and manually listed file extension types?
Hi Michael,
File Type Control is looking for the first few bytes of the file, also known as the “magic bytes” to determine the file type. This is much more reliable than merely looking at the extension or MIME type which can be easily changed. If you are looking to block based on filename, MIME type or manually listed extension, you may need to look into DLP policy to achieve it.