topic Excel XLSX recognized as ZIP file in General Topics

Excel XLSX recognized as ZIP file

licenselu — Thu, 20 Jun 2013 17:13:33 GMT

Hello,

I configured a File Blocking profile to block specific file format (like Exe, PE, RAR, etc).

Unfortunately, this profile also blocks Excel file in new format (.XLSX).

No problem, with the old format (.XLS) !!

After reading some doc, it seems that .XLSX is a compressed archive with a directory structure of XML text documents.

How can I block ZIP file and allow .XLSX file ??

Regards,

Re: Excel XLSX recognized as ZIP file

dyang — Thu, 20 Jun 2013 17:17:12 GMT

Hi HA,

You are correct - the new Microsoft Office format (XLSX, DOCX, etc) is really a compression file, which is why it will trigger the ZIP file signature. Unfortunately, in order to allow Microsoft Office 2007 files, you will need to also allow ZIP files.

--Doris

Re: Excel XLSX recognized as ZIP file

sraghunandan — Fri, 21 Jun 2013 02:54:01 GMT

There is a feature request submitted for this (FR ID:1829) , please have your local SE vote for this feature request.