# WHATPORT(50000)

## NAME

port 50000 — IBM Db2 (by convention) — Db2's conventional instance port — widely used, but by convention only, since IANA cannot assign in this range.

Protocol: TCP  
IANA registry

## DESCRIPTION

50000 is in the Dynamic/Private range and has no IANA assignment; IANA's registered ibm-db2 name belongs to port 523, not here. In practice 50000 is the default TCP service port configured for a Db2 LUW instance, which is why Db2 containers and installers publish it and why Nmap's service list labels it ibm-db2. It is also a common human-chosen port for application servers and proxies simply because it is a round number at the start of the range, so an open 50000 needs fingerprinting rather than assumption.

## EXPOSURE

**Do not expose.** If it is Db2, it is a database listener with the whole dataset behind it — bind it to a private network and reach it over a VPN or tunnel.

## CHECK

```sh
nmap -Pn -sV -p 50000 TARGET
```

## SEE ALSO

- docs — [IBM Db2 documentation — Db2 port usage information](https://www.ibm.com/docs/en/db2/11.5.0?topic=installing-db2-port-usage-information) (ibm.com)
- iana — [IANA Service Name and Transport Protocol Port Number Registry (ibm-db2 is registered at 523)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)
- spec — [RFC 6335 — IANA Procedures for Service Name and Transport Protocol Port Number Registry](https://www.rfc-editor.org/rfc/rfc6335.html) (rfc-editor.org)

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