In order to manage and develop Divio Cloud projects, only a few standard ports need to be open your network. These will generally be open anyway on all but the most restricted of networks.
Ports 80 and 443 (the standard HTTP and HTTPS ports) are required for general web access, Control Panel management and content/site management via our web interfaces.
For general development work, port 22 (SSH) is required.
In order to SSH directly into a Cloud container, port 2222 is required.
HTTP proxies on your network can affect some operations of Docker. For guidance on configuration, please see Using the Divio CLI or Divio App with an HTTP Proxy Server.