# WHATPORT(6481)

## NAME

port 6481 — Sun Service Tags — Sun/Oracle Service Tags agent — answers with the machine's serial number and hardware inventory.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA registers 6481 as servicetags, assigned to Peter Schow at Sun. The Service Tags agent shipped with Solaris and several Sun/Oracle products to support asset discovery, and it answers unauthenticated queries with system details: OS release, hostname, architecture, platform, manufacturer, serial number, hostid, RAM, and CPU counts. Nmap ships a servicetags NSE script that does exactly this over UDP 6481. Finding it open means an older Solaris or Sun-derived stack that still has the discovery listener enabled.

## EXPOSURE

**Do not expose.** It hands out serial numbers, hostids, and a full hardware profile with no authentication — precise inventory data for an attacker planning the next step. Disable the agent or firewall it to the asset-management server.

## CHECK

```sh
nmap -sU -p 6481 --script=servicetags TARGET
```

## SEE ALSO

- docs — [Nmap NSE — servicetags (Sun Service Tags, UDP 6481)](https://nmap.org/nsedoc/scripts/servicetags.html) (nmap.org)
- iana — [IANA Service Name and Transport Protocol Port Number Registry — 6481 (servicetags)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=6481) (iana.org)

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