# WHATPORT(9081)

## NAME

port 9081 — Reserved (TCP) — IANA holds 9081/tcp Reserved, so in practice it is the port the second app server got.

Protocol: TCP  
IANA registry

## DESCRIPTION

The registry marks 9081/tcp Reserved and assigns 9081/udp to cisco-aqos. With no TCP assignment, what you find is a local choice — most often the next HTTP port after 9080 when two Java application-server instances share a host, or a sidecar or metrics endpoint of whatever runs on 9080. Its meaning is entirely inherited from its neighbour, so look at 9080 on the same host first.

## EXPOSURE

**Expose with care.** Same treatment as the 9080 service it usually accompanies: plain HTTP behind a proxy, never published raw.

## CHECK

```sh
curl -sI http://TARGET:9081/
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 9081](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=9081) (iana.org)

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HTML: <https://whatport.net/9081/> · JSON: <https://whatport.net/9081.json> · full dataset: <https://whatport.net/ports.json>