[ExchangeList] Re: file filtering best practice?

  • From: "Teo De Las Heras" <teoheras@xxxxxxxxx>
  • To: exchangelist@xxxxxxxxxxxxx
  • Date: Wed, 26 Jul 2006 00:52:18 -0400

From what I've read, outbreak filters are design to work at Zero day.
Zero Day worms:
We use IronPort:

On 7/25/06, Martin Blackstone <MBlackstone@xxxxxxxxxxxxxxxxxx> wrote:
Right, but that would be after the 20th or so file came in.
The outbreak flag wont usually fire until you are getting hammered. That's a day later and a dollar short.
I agree with Jamie. Zero day / Zero hour is the concern.

From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx ] On Behalf Of Teo De Las Heras
Sent: Tuesday, July 25, 2006 6:23 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: file filtering best practice?

Is there a settings where it would block zip attachments based on an outbreak?  Normally your AV software should block any zip's with known viruses.  The risk is that a new virus comes out, propogates via zip, and noe of the AV vendors can identify.  In this case, an outbreak 'flag' would block/quarantine all zips temporarily.

On 7/25/06, Arnold, Jamie < harnold@xxxxxxxxxxxxxx> wrote:

In dealing with zip files specifically, I' m wondering what is considered the "best practice "?  We simply remove the file at our edge proxy, but have been getting a little flack from a few users.  Our data shows that nearly 94% of the .zip files that come in via email are infected so I ' m not likely to be convinced to allow them through.

What say you?

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