Port 2383Microsoft OLAP

Default TCP listener for Microsoft SQL Server Analysis Services (SSAS) OLAP queries and administration.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

also known as ms-olap4, SQL Server Analysis Services, SSAS, Microsoft Analysis Services

Technical Details

what runs on :2383

SSAS clients normally connect over TCP 2383 using Microsoft's Analysis Services client protocol and exchange requests for metadata, cubes, models, and query results. The service uses a proprietary binary/native protocol for standard client connections; XMLA is also used for management and analytical operations, commonly through SSAS client libraries. Port 2383 is the fixed default-instance listener, while named instances generally use dynamically assigned TCP ports and are located through SQL Server Browser on UDP 1434. IANA lists this assignment for both TCP and UDP, although normal SSAS listener traffic is TCP.

Security Information

exposure of :2383

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

databases averages 4.0 across 60 ports — this one sits 3.0 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

An internet-exposed SSAS listener provides direct access to a database analytics service and may disclose model metadata or sensitive query results if authentication or authorization is weak. It should normally be restricted to trusted application and administration networks; authentication and transport protection depend on SSAS configuration, so traffic should not be assumed encrypted by default.

Record

iana registry entry

port: :2383
service: Microsoft OLAP
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Databases
usage: Port 2383 is the default TCP port for a default-instance Microsoft SQL Server Analysis Services (SSAS) server. Engineers encounter it when multidimensional or tabular models are accessed by Excel, reporting tools, or OLAP client applications; named instances commonly use dynamic ports discovered through SQL Server Browser on UDP 1434.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 2383

Something wrong?

This record is maintained by the engineers who use port 2383. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-08-21.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

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all 60 in databases →

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risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :2383Microsoft OLAP

Technical Details

Security Information

Related Ports

Port 2383Microsoft OLAP