Dropbox desktop client cannot sync

Products

• Cloud Secure Web Gateway - Cloud SWG

Issue/Introduction

The desktop client for Dropbox installs and runs, but it cannot sync files from the cloud.

There is no problem accessing dropbox.com through a browser.

Environment

Web Security Service

Cause

The domain api.dropboxapi.com is dropping the connection because it detects that the SSL headers are being decrypted.

Resolution

Follow the following steps:

1. From the Portal Account access Service> Network> SSL Interception 
2. On SSL Interception Policy add a new rule by selecting Add Rule
3. Select Add Destinations> Domain/URL> New and add api.dropboxapi.com and set the rule to 'Do Not Intercept'.
4. If adding the above domain doesn't work, add 199.47.216.0/22 (this subnet belongs to Dropbox). Select Add Destinations> IP/Subnet> New and create the rule to not intercept.