> For the complete documentation index, see [llms.txt](https://docs.enginsight.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enginsight.com/docs/knowledge-base/english/troubleshooting/enginsight-cannot-connect-to-the-real-time-server-what-can-i-do.md).

# Enginsight cannot connect to the real-time server. What can I do?

If the Enginsight platform shows that **a connection to the real-time server cannot be established**, this is often related to the WebSocket configuration of your firewall.

The WebSocket protocol is a network protocol based on TCP (Transmission Control Protocol) that enables a persistent, bidirectional connection between a web browser and a server.

However, many firewalls do not allow WebSocket connections by default. As a result, Enginsight components such as Pulsar, Hacktor, or Observer may be unable to establish a connection.

To resolve the issue, you need to manually enable WebSocket connections in your firewall. Refer to your firewall vendor’s documentation on how to do this.

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