# WHATPORT(3011)

## NAME

port 3011 — trusted-web (registered) — Registered as Trusted Web, one of a pair with 3012 (Trusted Web Client), and rarely seen.

Protocol: TCP/UDP  
IANA: trusted-web

## DESCRIPTION

IANA registers 3011 as trusted-web and 3012 as twsdss, "Trusted Web Client" — a server/client pair from a 1990s commercial product of that name. No public specification survives and there is no maintained implementation, so the names outlive the software. A listener on 3011 today is almost certainly an unrelated application that grabbed a free port.

## EXPOSURE

**Expose with care.** "Trusted" is a product name, not a property of the port — find out what is actually listening before treating it as safe.

## CHECK

```sh
sudo lsof -nP -iTCP:3011 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 3011 (trusted-web)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=3011) (iana.org)

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HTML: <https://whatport.net/3011/> · JSON: <https://whatport.net/3011.json> · full dataset: <https://whatport.net/ports.json>