# WHATPORT(7900)

## NAME

port 7900 — noVNC (Selenium containers) — On any CI or Selenium host this is noVNC — a browser-viewable live view into a container's desktop.

Protocol: TCP  
IANA registry

## DESCRIPTION

The official Selenium Docker images publish 7900 for noVNC, so you can watch a test run by opening http://localhost:7900/?autoconnect=1&resize=scale&password=secret. It is an HTTP endpoint that proxies the container's VNC server into a web page. IANA registers 7900 as mevent, Multicast Event, but that assignment carries no implementation you are likely to meet. If 7900 is open on a build agent or a Kubernetes node, look for selenium/standalone-* or selenium/node-* containers.

## EXPOSURE

**Do not expose.** The documented default password is literally "secret", and access grants full interactive control of a real browser session — including whatever it is logged into. Keep it on localhost or a private network.

## CHECK

```sh
curl -sI http://127.0.0.1:7900/
```

## SEE ALSO

- source — [SeleniumHQ/docker-selenium — noVNC on port 7900](https://github.com/SeleniumHQ/docker-selenium) (github.com)
- iana — [IANA port registry — 7900 (mevent)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=7900) (iana.org)

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