How I create the correct rule to block some attachments

[nick]

Hi all,

I realy need to know how to create the correct rule to block some extensions types (ex: *.abc and *.xyz).

What I do:

1) I go in "What" section and I add a new What Object called: Blocked_Extensions
2) I Edit the object and I add a new ContentType Object.
Choose ContentType: application/.*
ContentType: .abc, .xyz

3) I save the object and I go in rule and I add new rule; On action I add:
Block; Notify Admin; Quarantine

What I do wrong because some mail are passed trough this filter.

I use proxmox-mailgateway/2.2/3705

 

[dietmar]

2) I Edit the object and I add a new ContentType Object.
Choose ContentType: application/.*
ContentType: .abc, .xyz

ContentType objects match against the MIME content type, and not against file names.

Please use a 'MatchFilename' object instead. To match above extensions use the following value (regular expression):

.*\.(abc|xyz)

 

[nick]

If I give a test I receive this error:

Test doesn't match!

I create for example: .*\.(exe|cab|lnk|mp3|wav|pps|avi|mpg|mpeg)

 

[nick]

OK, It's correct now! I Put the filter in test field and that's why I receive the error! Now I create the correct rule and it's working!

Thank you!

 

[dietmar]

Note: Using file extensions is not always accurate. Its better to use the ContentType filter because that filter analyzes the files to see what it really contains (mime type detector).

 

[nick]

And how I create a content type rule correct for extensions write in example?

 

[dietmar]

You need to create several content type objects (one for each type you want to match).

Simply tahe a look at the default 'What' objects to see how it works.

- Dietmar