Hey there trying to learn how to filter attachments with a list of extensions. I'd like to write a filter that will scan for all items like .exe, .dll and a long list of things of that sort and delete them. Not sure how to do this. Can anyone help with this basic question?
Thanks, -Jay
At 3:53 PM -0700 2005-04-29, Jarrel Pertschuk wrote:
Hey there trying to learn how to filter attachments with a list of extensions. I'd like to write a filter that will scan for all items like .exe, .dll and a long list of things of that sort and delete them. Not sure how to do this. Can anyone help with this basic question?
The problem is that these sorts of things could be presented in any number of ways, and may or may not correspond to given MIME bodypart types, etc.... You're better off selecting the things that you know to be safe and allowing them through and then rejecting or stripping everything else.
That's easily done by going into the "Content Filtering" page of the web admin interface for your mailing list, turning on the radio button at the top of that page (with the description "Should Mailman filter the content of list traffic according to the settings below?"), and then making sure that the first multi-line field is empty, and the second multi-line field has the MIME bodypart types you know to be safe.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755SAGE member since 1995. See <http://www.sage.org/> for more info.
Jarrel Pertschuk wrote:
Hey there trying to learn how to filter attachments with a list of extensions. I'd like to write a filter that will scan for all items like .exe, .dll and a long list of things of that sort and delete them. Not sure how to do this. Can anyone help with this basic question?
Mailman 2.1.6 header filter rules extend to mime subparts. Thus you can use these rules to delete/hold/reject entire posts based on regexp matches on the file name of attachments. You can't just strip the attachment this way though. That can only be done by mime content-type through the standard content filtering settings.
There is a post from Tokio Kikuchi in this list's archives about this, but I'm currently on a ship where internet connectivity costs $0.35/minute, so I leave it to you to find it.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
participants (3)
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Brad Knowles -
Jarrel Pertschuk -
Mark Sapiro