# WHATPORT(2393)

## NAME

port 2393 — Microsoft OLAP (legacy) — A Microsoft OLAP registration from the pre-Analysis-Services era; dormant today.

Protocol: TCP  
IANA: ms-olap1

## DESCRIPTION

IANA registers 2393 as ms-olap1, "MS OLAP 1", one of a block Microsoft took for its OLAP server work alongside 2394 (ms-olap2), 2382 (ms-olap3) and 2383 (ms-olap4). Current SQL Server Analysis Services documentation only ever names 2383 for the engine and 2382 for the SQL Server Browser redirector, so 2393 is a historical reservation rather than a port modern SQL Server binds. Anything answering here today should be identified by process rather than assumed to be Microsoft OLAP.

## EXPOSURE

**Do not expose.** If something genuinely OLAP-shaped is listening it is a database engine, and if it is something else you do not know what it is — neither belongs on a public interface.

## CHECK

```sh
sudo lsof -nP -iTCP:2393 -sTCP:LISTEN
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 2393 (ms-olap1)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=2393) (iana.org)
- docs — [Microsoft Learn — Configure the Windows Firewall to Allow Analysis Services Access (documents 2382/2383)](https://learn.microsoft.com/en-us/analysis-services/instances/configure-the-windows-firewall-to-allow-analysis-services-access) (learn.microsoft.com)

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