RE: Prevent sending attachments

[Snook, Kevin S (ITD)]

Title: Message

Maybe "ZIP files are rife" in ICL but that's not a normal business environment. Most of the users I come across can't spell ZAp , I mean Zep, err... I mean Zop. Attaching a file is about as good as it gets!

 

Kevin

-----Original Message-----
From: Boswell Tim [mailto:[EMAIL PROTECTED]]
Sent: 31 October 2001 15:19
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

of course, the one problem is that in a business environment, ZIP files are rife, and in one sense good, because they keep the attachment size down for work related material. The problem is that if a file is renamed THEN zipped, you've got twice the battle. Can you really risk filtering all ZIP files and losing business critical information to it?

 

Of course, that said, it's quite possible to insert a file as a package in a Word doc, so if someone really wants to get something in, and the person at the other end knows it's coming, there's no easy way of stopping it. Even if your package can look inside ZIP files and filter files from within them, all it sees is a word document, and it goes straight through.

-----Original Message-----
From: Mark Kelsay [mailto:[EMAIL PROTECTED]]
Sent: 31 October 2001 15:07
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

I believe that antigen is aware of this trick and will still remove it.

-----Original Message-----
From: Robin Lawrie [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 9:47 AM
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

Definitely. It's all too easy to change the extension of a file so it's allowed through a virus scanner/mail management software when it shouldn't be, and then renamed at the other end.

 

We have a similar problem on our file server. We've prohibited people from saving particular files, such as mp3, but they can all bypass it by changing the extension of the file to .zip or .doc.

-----Original Message-----
From: Snook, Kevin S (ITD) [mailto:[EMAIL PROTECTED]]
Sent: 31 October 2001 14:50
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

Why not?

-----Original Message-----
From: Martin Blackstone [mailto:[EMAIL PROTECTED]]
Sent: 31 October 2001 13:44
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

What do you mean? Something that would block a .EXE file even if the extension was changed to .XXX?

Hmmmm.....interesting.

-----Original Message-----
From: MHR(Michael Ross) [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 5:36 AM
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

NAV for Exchange can do this with a registry tweak.. Its in the read me.
What id like is software that filters file types without using extentions.

-----Original Message-----
From: Martin Blackstone [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 7:35 AM
To: MS-Exchange Admin Issues
Subject: RE: Prevent sending attachments

Your Exchange aware Antivirus SW should be able to do this. What are you using?

-----Original Message-----
From: Vlastimil Schart [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 31, 2001 3:35 AM
To: MS-Exchange Admin Issues
Subject: Prevent sending attachments

Hi there,

We are using Exchange Server 5.5 SP3 on a Windows NT Server 4.0 SP6. Clients are using Outlook 97. Is there a way to prevent users from sending attachment of a specific filetype ? For instance *.mpeg, *.avi an so on ? Both internal and external mail.

Regards,
Vlastimil Schart
Arcus ASA

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