topic Dropbox uploaded files not determined correctly in General Topics

Dropbox uploaded files not determined correctly

Megrretz — Tue, 19 Apr 2022 11:25:58 GMT

Hello, after implementing SSL decryption we're trying to improve visibility and noticed that files to dropbox web aren't shown correctly

When downloading from the dropbox website, the file names are correctly shown, but when uploading the files are registered in the data filtering logs as "presentation.xml" and "put_block_returning_token"

Tried this on Palo 9.1 and 10.1 and from chrome and mozilla

Is there a workaround to this that would let us see what users are uploading?

Thank you!

Re: Dropbox uploaded files not determined correctly

kiwi — Thu, 21 Apr 2022 08:15:03 GMT

Hi @Megrretz ,

I believe it's a limitation caused by how Dropbox works:

The payload or packet in which the file is being uploaded to Dropbox is a new connection with no filename in it but with name "put_block_returning_token_unauth". Once the upload is done, dropbox updates the filename in the initial connection which has no data.

Because there is no filename in the connection in which data is being uploaded, the firewall cannot identify the correct filename.

Compared to Dropbox download, the filename and data are in same connection and same packet hence, filename would be identified correctly.

Cheers,

-Kiwi.

Re: Dropbox uploaded files not determined correctly

Megrretz — Fri, 22 Apr 2022 09:47:15 GMT

That's what Palo support said as well. Too bad!

Thank you