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// Other services

Port 2383: Microsoft OLAP

Port 2383 is assigned by IANA to ms-olap4 (Microsoft OLAP).

2383

How ms-olap4 works

Other services
client:2383ms-olap4response client:2383ms-olap4response

The client sends a request to port 2383 and the ms-olap4 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 2383 dangerous?

We have no specific security note for port 2383. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 2383

ServicePortTransportDescriptionReferenceUpdated
ms-olap4 2383 TCP, UDP Microsoft OLAP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2383, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2383'      # process listening on 2383
sudo lsof -nP -i :2383

macOS

sudo lsof -nP -i :2383

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2383 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2383
netstat -ano | findstr :2383

From another machine

nmap -p 2383 -sV <host>
sudo nmap -sU -p 2383 <host>
nc -zv <host> 2383

Block it in the firewall

sudo ufw deny 2383/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2383" -Direction Inbound -LocalPort 2383 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2383 used for?

Port 2383 is assigned by IANA to ms-olap4 (Microsoft OLAP).

Is port 2383 TCP or UDP?

Port 2383 is registered for TCP and UDP.

Is it safe to open port 2383?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 2383 is open?

On Linux run "ss -ltnup 'sport = :2383'", on macOS "lsof -nP -i :2383", and on Windows "netstat -ano | findstr :2383" to see the local process. From another machine, "nmap -p 2383 <host>" shows whether it is reachable.

05 Related
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