# WHATPORT(163)

## NAME

port 163 — CMIP/TCP Manager — The manager side of CMOT, the OSI network-management protocol that SNMP beat.

Protocol: TCP  
IANA registry

## DESCRIPTION

Port 163 is registered as `cmip-man`, the CMIP-over-TCP manager, with 164 as the agent side. CMOT — CMIP over TCP/IP, RFC 1189 — was the OSI-flavored competitor to SNMP for managing IP networks, and it lost decisively; the RFC itself was later reclassified as historic. Telco OSS systems were the only real deployments, and those are gone or isolated. You will not meet this on a general-purpose network.

## EXPOSURE

**Do not expose.** A network-management plane with no modern security story. If something is genuinely speaking CMIP, it belongs on an isolated management network.

## CHECK

```sh
nc -vz TARGET 163
```

## SEE ALSO

- spec — [RFC 1189 — Common Management Information Services and Protocols for the Internet (CMOT and CMIP)](https://www.rfc-editor.org/rfc/rfc1189.html) (rfc-editor.org)
- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

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HTML: <https://whatport.net/163/> · JSON: <https://whatport.net/163.json> · full dataset: <https://whatport.net/ports.json>