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block download zip files from gmail
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block download zip files from gmail - 16.Jul.2007 4:52:20 AM
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auchanaka1980
Posts: 100
Joined: 16.Jan.2007
Status: offline
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Hi,
i configured the rule to block the exe,zip file, when they try to download the file i's block, i try to download zip file from my gmail i can download without having anyproblem, how can i block the that,
via gmail how to block the file download.
pls help to me.
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RE: block download zip files from gmail - 16.Jul.2007 11:14:38 AM
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ferrix
Posts: 369
Joined: 16.Mar.2005
Status: offline
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When I try to get a zip through gmail, the headers come back as:
quote:
Cache-control: private
Pragma:
Content-Type: application/zip
Expires: Tue, 17 Jul 2007 15:08:13 GMT
Content-Disposition: attachment; filename="filename.zip"
I don't know how you have your filter set up, but it seems you could block the signature "application/zip" and it ought to work.
Your gmail isn't going over https is it? (mine was just http). Anything over https ISA can't see without a third-party add on software.
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RE: block download zip files from gmail - 16.Jul.2007 11:20:40 PM
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auchanaka1980
Posts: 100
Joined: 16.Jan.2007
Status: offline
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thanks for ur reply. i want to do
I wants to block attachment for yahoo,hotmail,gmail users. How can I achieve this
yes, gmail connecting https.
help me to block attachment.
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RE: block download zip files from gmail - 17.Jul.2007 8:22:18 AM
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ferrix
Posts: 369
Joined: 16.Mar.2005
Status: offline
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Well I'm not an expert on every filter available for ISA, but there are probably ones that can do more intelligent signature blocking than the built-in http filter. But even the built-in one should be able to match the mime types of attachments you wish to block.
If you want ISA to be able to inspect and control traffic inside HTTPS you need a third-party add on because ISA 2006 can't do this by default. Take a look at ClearTunnel under the "software->content security" section of this site.
Probably easier just to block webmail destinations completely though :)
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RE: block download zip files from gmail - 19.Jul.2007 5:09:43 AM
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auchanaka1980
Posts: 100
Joined: 16.Jan.2007
Status: offline
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thanks for ur mail, still i didn't get the corect answer.
pls help me to solve this problem.
regards,
chanaka.
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RE: block download zip files from gmail - 22.Jul.2007 5:36:50 AM
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justmee
Posts: 505
Joined: 14.May2007
Status: offline
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Hi,
Yes, the link ITEngineer gave might do the trick.
However playing with Content Type on ISA rule might be tricky because you should be aware of what those fields means otherwise you can block something else.
http://www.ietf.org/rfc/rfc2616.txt
Gmail will use ssl after login if you go by:
https://www.gmail.com
In this case ClearTunnel will do the trick.
I have it on my ISA 2006.
If you go by
http://www.gmail.com
it will not use ssl after login.
For gmail you can create a rule for the following Domain Name Sets(it might be others too, this is what I have observed):
googlemail.com
mail.google.com
And create a signature like:
Search in: Response Headers
Http Header: Content-Type
Signature: zip
or/and
Search in: Response Headers
Http Header: Content-Type
Signature: rar
Also you can block users from downloading attachments using the following signature(obviously you can restrict this for the sites required):
Search in: Response Headers
Http Header: Content-Disposition
Signature: attachment
I've tested this with gmail yahoo, hotmail.
Regards!
< Message edited by justmee -- 22.Jul.2007 5:37:52 AM >
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