Question regarding Filename Rules

[Denis Beauchemin]

    [ The following text is in the "ISO-8859-1" character set. ]
    [ Your display is set for the "US-ASCII" character set.  ]
    [ Some characters may be displayed incorrectly. ]

Julian Field wrote:

> Denis Beauchemin wrote:
>
>> Rob Poe wrote:
>>
>>> I guess the thing about it is this:
>>> If we're blocking executable files, then how would that rule help?
>>>
>>> I'm not being argumentative .. Just curious..
>>>
>>>
>>>
>> Rob,
>>
>> I run with that rule turned off because it caused too much trouble BUT
>> I block all executables (pif, bat, exe, ...).  Turns out I was never
>> caught off guard, even with slow antivirus updates.
>
>
> The other important thing to remember is that the "executable" block in
> filetype.conf will help you a lot here too, for when they evade your
> filename traps with a bit of social engineering (e.g. _exe instead of 
> .exe).


Julian,

I agree with you on this but I don't use filetype.conf because for now 
there are no viruses that ask people to rename _exe inti .exe.  I also 
tell people to rename their .exe into something else if they want them 
to pass through my servers.

As soon as one virus goes that route I will have to activate 
filetype.conf but I predict my users won't like it... But implementing 
security measures has always been PITA for users.

Denis

-- 
   _
  °v°   Denis Beauchemin, analyste
 /(_)\  Université de Sherbrooke, S.T.I.
  ^ ^   T: 819.821.8000x2252 F: 819.821.8045



------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
'leave mailscanner' in the body of the email.
Before posting, read the Wiki (http://wiki.mailscanner.info/) and
the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).

Support MailScanner development - buy the book off the website!

    [ Part 2, "S/MIME Cryptographic Signature"  ]
    [ Application/X-PKCS7-SIGNATURE  4.4KB. ]
    [ Unable to print this part. ]