Not really, wrt email anyway. Some products like Mailmarshall (http://www.marshalsoftware.com/) ID file types based on signature. From their website:
"MailMarshal and WebMarshal can identify over 80 different file types by the file type code signature, with more being added all the time. This means that even if someone tries to slip an attachment past MailMarshal by changing the file extension, MailMarshal will still recognize the true file type by its internal code characteristics. MailMarshal can identify other file types by extension if the type is not already pre-identified within MailMarshal. Marshal products' pre-installed menu of file type blocking choices currently includes a variety of types for various operating systems in these categories:" Paul Singleton CISSP -----Original Message----- From: RUSSELL T. LEWIS [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 23, 2002 4:59 AM To: [EMAIL PROTECTED] Subject: Re: Floppy & CD Access Control and Authorisation What would stop me from naming very_bad_file.exe to seemingly_good_file.txt to bypass this? -Russell Lewis "Ian Kelly" <[EMAIL PROTECTED]> on 07/20/2002 06:22:04 AM To: [EMAIL PROTECTED] cc: (bcc: RUSSELL T. LEWIS/SPECTRAL RESPONSE INC./SPECTRALNT1) Subject: Floppy & CD Access Control and Authorisation Is anyone aware of any solutions that would check floppies, CD's etc. and block unapproved file types (exes, mp3's etc.) from being transferred to the PC? I can only find physical / software locks that block everything or software authorisation systems that allow access to a pre-authorised disks only. I know that there are content security solutions that can be configured to stop unapproved file types entering an organisation via email and the Internet and there are server resource management solutions that can stop a user saving unapproved file formats onto a network share but I can't find a solution like this for removable media. Does anyone have any ides? Ian.
