# WHATPORT(1081)

## NAME

port 1081 — PVUNIWIEN — Registered as PVUNIWIEN; nothing beyond the registration was ever published.

Protocol: TCP  
IANA registry

## DESCRIPTION

IANA lists 1081/tcp and 1081/udp as pvuniwien, registered to Peter Lipp, with no expansion of the name and no referenced document. No implementation is publicly available. In practice the port matters mostly because it sits one above SOCKS, so scanners and misconfigured proxy clients touch it constantly.

## EXPOSURE

**Expose with care.** Undocumented registration — treat any listener as unidentified and check whether it is actually a second SOCKS or HTTP proxy instance.

## CHECK

```sh
nmap -sV -Pn -p 1081 TARGET
```

## SEE ALSO

- iana — [IANA port registry — 1081 (pvuniwien)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1081) (iana.org)

---

HTML: <https://whatport.net/1081/> · JSON: <https://whatport.net/1081.json> · full dataset: <https://whatport.net/ports.json>