How can I block .zip and .rar files that contain only .exe files?

A

aynur.yilmaz

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Dec 17, 2021
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Hello,

I want to know a way to block .zip and .rar files containing only .exe files through Proxmox Mail Gateway.

Allow .zip and .rar files that do not contain .exe files.

Thanks. Best regards.
 
create an 'Archive Filter' object to match exe files - and a fitting rule to block this 'What Object'

I hope this helps
 
* create what object:
* GUI->Mail Filter->What Objects->Create (create a new object and name it "zipped exe"
* select the object the 'Add->Archive Filter' and select 'application/x-ms-dos-executable (exe)'

* create a rule (chose the priority fittingly)
* GUI->Mail Filter->'Add'
* What Object "zipped exe"
* Action Object "Block"

I hope this helps
 
Stoiko Ivanov said:
* create what object:
* GUI->Mail Filter->What Objects->Create (create a new object and name it "zipped exe"
* select the object the 'Add->Archive Filter' and select 'application/x-ms-dos-executable (exe)'

* create a rule (chose the priority fittingly)
* GUI->Mail Filter->'Add'
* What Object "zipped exe"
* Action Object "Block"

I hope this helps
Click to expand...

hi stoiko,
i have done your steps, but proxmox didnt recognize the .exe file as a application/x-ms-dos-executable file in that archive. Whats the problem?

Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: found archive 'write-1.rar' (application/vnd.rar)
Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: unpack failed - child '58439' failed: 512
Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: unpack archive 'write-1.rar' done (22 ms)

Mar 25 10:15:55 mx2 pmg-smtp-filter[58470]: 281510623D884AA2E2D: found archive 'appidtel-1.zip' (application/zip)
Mar 25 10:15:55 mx2 pmg-smtp-filter[58470]: 281510623D884AA2E2D: unpack archive 'appidtel-1.zip' done (21 ms)
Mar 25 10:15:56 mx2 pmg-smtp-filter[58470]: 281510623D884AA2E2D: block mail to <xxxxxx@xxxxxx.de> (rule: Block Zipped EXE)

Zip-Files are ok!

Best regards.

Cyprian
 
Last edited:
cyprian1981 said:
hi stoiko,
i have done your steps, but proxmox didnt recognize the .exe file as a application/x-ms-dos-executable file in that archive. Whats the problem?

Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: found archive 'write-1.rar' (application/vnd.rar)
Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: unpack failed - child '58439' failed: 512
Mar 25 10:05:24 mx2 pmg-smtp-filter[58295]: 281510623D85D46B66B: unpack archive 'write-1.rar' done (22 ms)
Click to expand...
on a hunch (without reproducing this) - did you install the necessary packages from the non-free section for rar-support:
see 3.5.6 at:
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmg_package_repositories
 
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