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Port 2383 (ms-olap4)

IANA assigns port 2383 to ms-olap4: Microsoft OLAP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-olap4 TCP Microsoft OLAP Mosha Pasumansky -
ms-olap4 UDP Microsoft OLAP Mosha Pasumansky -

Check what is listening on port 2383

Linux: is anything listening on TCP 2383?
sudo ss -tlnp 'sport = :2383'
Linux: UDP 2383
sudo ss -ulnp 'sport = :2383'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2383
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2383 '
Windows (Command Prompt)
netstat -ano | findstr :2383
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2383 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2383
From Windows
Test-NetConnection HOST -Port 2383
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2383

Block port 2383 in the firewall

ufw
sudo ufw deny 2383/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2383 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2383 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2383' -Direction Inbound -Protocol TCP -LocalPort 2383 -Action Block
ufw
sudo ufw deny 2383/udp
iptables
sudo iptables -A INPUT -p udp --dport 2383 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2383 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2383' -Direction Inbound -Protocol UDP -LocalPort 2383 -Action Block

Related ports

2381compaq-https2382ms-olap32384sd-request, sd-capacity2385sd-data

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.