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// Other services

Port 2393: MS OLAP 1

Port 2393 is assigned by IANA to ms-olap1 (MS OLAP 1).

2393

How ms-olap1 works

Other services
client:2393ms-olap1response client:2393ms-olap1response

The client sends a request to port 2393 and the ms-olap1 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 2393 dangerous?

We have no specific security note for port 2393. 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 2393

ServicePortTransportDescriptionReferenceUpdated
ms-olap1 2393 TCP, UDP MS OLAP 1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2393, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2393'      # process listening on 2393
sudo lsof -nP -i :2393

macOS

sudo lsof -nP -i :2393

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2393 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2393
netstat -ano | findstr :2393

From another machine

nmap -p 2393 -sV <host>
sudo nmap -sU -p 2393 <host>
nc -zv <host> 2393

Block it in the firewall

sudo ufw deny 2393/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2393" -Direction Inbound -LocalPort 2393 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2393 used for?

Port 2393 is assigned by IANA to ms-olap1 (MS OLAP 1).

Is port 2393 TCP or UDP?

Port 2393 is registered for TCP and UDP.

Is it safe to open port 2393?

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 2393 is open?

On Linux run "ss -ltnup 'sport = :2393'", on macOS "lsof -nP -i :2393", and on Windows "netstat -ano | findstr :2393" to see the local process. From another machine, "nmap -p 2393 <host>" shows whether it is reachable.

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