1. Sharing files and folders
  2. Payments and billing
  3. Security and privacy
  4. Dropbox Business
  5. Syncing and uploads
  6. Sign-in help
  7. Desktop app and dropbox.com
  8. Manage account
  9. Space and storage
  10. Photos and videos
  11. Mobile
  12. Dropbox Paper

Configuring a firewall to work with Dropbox

Usually no firewall configuration is needed to run the Dropbox desktop app. If your web browser has an internet connection, the desktop app should be able to use the same connection.

However, if sync isn’t working, adjust your firewall settings to permit the desktop app internet access. Usually, adding Dropbox to a list of applications with internet access resolves the issue.

For our advanced users

Each brand of firewall software works differently depending on the manufacturer. Refer to your firewall software documentation for specific directions. In general, you may need to do the following:

  • Allow Dropbox (or Dropbox.exe and DropboxUpdate.exe in Windows) access to ports 80 (HTTP) and 443 (HTTPS)
  • The Open button requires access to ports 17600 and 17603
  • The LAN Sync feature requires access to port 17500 (recommended)
  • Add dropbox.com to the list of approved websites for your firewall, and make sure that it isn’t blacklisted
  • You may need to allow *.dropbox.com to access the internet
  • On Mac computers, allow Dropbox Web Helper access to the internet

Dropbox also supports most proxies. If you use a proxy to access the internet, you can specify your proxy settings within Dropbox desktop app preferences. Learn how