RAS HTML5 page is failing to load after signing in

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WebSocket connection wss://farm_url failed: Connection closed before receiving a handshake response


Required protocols and settings are being blocked/misconfigured in the software/hardware firewall and/or the Load Balancing solution in use.


The filtering rules and settings, responsible for the WebSockets must be enabled on the Firewall in use.

Parallels RAS HTML5 using  the following protocols: WS, WSS, HTTP/1.1

NOTE: Using WS does not mean that a connection is not secure. RAS HTML5 always redirects WS/HTTP to WSS/HTTPS.

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