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Editorial Team
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Asked: 2026-06-07T05:38:10+00:00

using node.js and socket.io to serve websockets does socket.io need to be listening on

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using node.js and socket.io to serve websockets

does socket.io need to be listening on port 80 – the real port for websockets, or can it be proxied to a different port, eg, port 8011, on the server?

the browser, using websockets, talks through 80/http. on the server haproxy redirects websockets to node.js.

right haproxy directs to 127.0.4.11:80. this works fine, but this requires sudo to run node.js.

would rather redirect to localhost:8011, but do not know if socket.io needs to actually be on port 80 to support websockets correctly.

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1 Answer

  1. Editorial Team

    WebSockets (and Socket.IO) can run on any port; most developers will develop their servers on a high-numbered port specifically to avoid running as root in development. Furthermore, the Socket.IO wiki has a page on ports and which ones work for various firewall software.

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