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Using Cubelets Software and Apps on Restricted Networks

If you are having troubles getting Cubelets Blockly, Cubelets Flash or the Cubelets mobile app to work when on a network that may have access restrictions (such as schools, businesses, or government), this information may be of help to your IT or tech team.

URLs, protocols and ports that need to be whitelisted:

Our tech team suggests that your IT verifies that WebSocket connections are permitted to compile on port 80. Websockets are a special type of http connection and some firewalls require specific configuration to permit these connections.

Occasionally we’ve seen “Layer-7 Firewall” prohibit WebSocket communications.

Still have questions?  We’d love to help! You can always reach us at

in ProgrammingTroubleshooting Tags: BlocklyCompilerCubeletsITSupportTech