# WHATPORT(7103)

## NAME

port 7103 — Unassigned — No IANA registration and no established service — an application-specific listener if you find it open.

Protocol: TCP  
IANA registry

## DESCRIPTION

7103 is absent from the IANA registry on both TCP and UDP; the neighbouring assignments are 7100 (X Font Service) and 7101 (Embedded Light Control Network). Nmap carries it as "unknown" with an open-frequency of 0.000304, so it is seen occasionally in wide scans but with no consistent service behind it. Treat it as an arbitrary high port chosen by whatever software is running.

## EXPOSURE

**Expose with care.** Nothing about the number tells you the risk; identify the listening process first, then apply that service's rules.

## CHECK

```sh
sudo lsof -nP -iTCP:7103 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 7103](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=7103) (iana.org)

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HTML: <https://whatport.net/7103/> · JSON: <https://whatport.net/7103.json> · full dataset: <https://whatport.net/ports.json>