Created on
03-28-2024
10:11 PM
Edited on
03-26-2025
11:15 PM
By
Jean-Philippe_P
Description | This article describes that the Dropbox desktop app does not work when Deep Inspection is enabled on the FortiGate Firewall Rule. |
Scope | FortiGate and Windows OS. |
Solution |
When installing the Dropbox desktop app on a Windows machine, with deep inspection enabled in the firewall policy from LAN to WAN, Dropbox may fail to function. The desktop app does not open or continuously spin without displaying the login screen.
This behavior is typically due to Full SSL inspection being enabled. Dropbox uses end-to-end encryption(E2EE) to secure communications. Full SSL Inspection decrypts and re-encrypts traffic, which can break E2EE. For more information on the differences between SSL Certificate Inspection and Full SSL inspection, refer to this related article: Technical Tip: Differences between SSL Certificate Inspection and Full SSL Inspection
The Dropbox team recommends whitelisting a list of domains in FortiGate. It is possible to find the list of official Dropbox domains here: What official domains does Dropbox use?.
To whitelist these domains in the SSL INSPECTION security profile under 'Exempt from SSL Inspection', follow these steps:
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