Marjan,
> New MS office files are zip archives. That zip archives include base
> document and attacments. The problem is with attecments with file
> extensions wmf and emf.
>
> I would like to block standalone wmf and emf mail attacments, but allow
> wmf and emf inside docx file/archive.
>
> The folowing example would allow any file inside archive.
>
> ### BLOCK THE FOLLOWING, EXCEPT WITHIN ARCHIVES:
> [ qr'^\.(zip|rar|arc|arj|zoo)$'=> 0 ], # allow any within these archives
Right.
> But, is it possible to define new banned "policy" for archive, to allow
> some files and to banned some others.
Depends on what how your 'archive' is implemented or what you mean by that.
If an archive is implemented by a dedicated e-mail address and you
want this address to have different banning rules than the rest,
then yes, per-recipient banning rules are possible.
Search RELEASE_NOTES for:
banned filename/filetype rules can now be specified
on a per-recipient basis
Something like this:
@banned_filename_maps = (
{
'[email protected]' => 'ARCHIVE_RULES',
'[email protected]' => 'ALLOW_EXE',
'[email protected]' => 'ALLOW_VBS',
'[email protected]' => 'ALLOW_VBS,ALLOW_EXE',
'.' => 'DEFAULT',
},
);
%banned_rules = (
'ARCHIVE_RULES' => new_RE( [qr'^' => 0] ), # allow all
'NO-MS-EXEC'=> new_RE( qr'^\.(exe-ms)$' ),
'ALLOW_EXE' => # pass executables except if name ends in .vbs .pif .scr .bat
new_RE( qr'.\.(vbs|pif|scr|bat)$'i, [qr'^\.exe$' => 0] ),
'ALLOW_VBS' => # allow names ending in .vbs
new_RE( [qr'.\.vbs$' => 0] ),
'NO-VIDEO' => new_RE( qr'^\.movie$',
qr'.\.(asf|asx|mpg|mpe|mpeg|avi|mp3|wav|wma|wmf|wmv|mov|vob)$'i, ),
'NO-MOVIES' => new_RE( qr'^\.movie$', qr'.\.(mpg|avi|mov)$'i, ),
'MYNETS-DEFAULT' => new_RE(
[ qr'^\.(rpm|cpio|tar)$' => 0 ], # allow any in Unix-type archives
qr'.\.(vbs|pif|scr)$'i, # banned extension - rudimentary
# qr'.\.(exe|vbs|pif|scr|bat|cmd|com|cpl)$'i, # banned extension - basic
qr'^\.(exe-ms)$', # banned file(1) types
),
'DEFAULT' => $banned_filename_re,
);
( greeting from two blocks away :)
Mark
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