Suggested addition to default filename and filetype rules

Julian Field mailscanner at
Thu Sep 9 11:29:15 IST 2004

At 08:18 09/09/2004, you wrote:
>On Thu, 9 Sep 2004, James Gray wrote:
>>Maybe it's just our site, but was there a reason Windows Media files were
>>out when Quicktime/MPEG/etc were included for denial?
>>For the archives, here's what we have in our (modified) rules:
>><<< filename.rules.conf >>>
>># Deny Windows Media etc
>>deny  \.wm[adsvz]   Windows Media Format    We don't allow Windows Media
>>deny  \.w[av]x      Windows Media Format    No Windows media metafile links
>>deny  \.as[fx]      Windows Media Format    We don't allow Windows Media
>><<< filetype.rules.conf >>>
>>deny  ASF           No Windows Media        No Windows Media files allowed

I have added the filetype.rules.conf one, but not the filename.rules.conf
ones. I don't want my standard ruleset to be too restrictive. Only a very
small percentage of you ever edit the files at all, and I don't want to
annoy everybody more than I have to.
Do we really need to ban all media files at all? Banning the movies is
probably good as they tend to be huge and illegal/worthless. But all the
audio files as well?

Also, does anyone know of any attacks done involving media metafile links?
Hopefully these are small and harmless.
Julian Field
MailScanner thanks transtec Computers for their support

PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654

------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at with the words:
'leave mailscanner' in the body of the email.
Before posting, read the MAQ ( and
the archives (

More information about the MailScanner mailing list