Dropbox Whitelists for Web Security Proxy
Dropbox themselves have simply declared that adding *.dropbox.com to your whitelist will work – in our experience this is incorrect and does not always solve.
We started to look into these Dropbox blocks in our lab and using Wireshark, we found that the installer download and the sync tool were actually trying to download from various IP addresses within a single range as well as some standard URL’s.
So, we added these IP’s and URL’s into our whitelists and Dropbox started to connect and work perfectly after this. From our investigations, these are what you need to add to your whitelists to enable Dropbox to work correctly through a proxy:
- 18.104.22.168/24 – the whole range of IP addresses