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Port 48000 (nimcontroller)

IANA assigns port 48000 to nimcontroller: Nimbus Controller.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nimcontroller TCP Nimbus Controller Carstein Seeberg 2 -
nimcontroller UDP Nimbus Controller Carstein Seeberg 2 -

Check what is listening on port 48000

Linux: is anything listening on TCP 48000?
sudo ss -tlnp 'sport = :48000'
Linux: UDP 48000
sudo ss -ulnp 'sport = :48000'
Linux / macOS: which process owns the port
sudo lsof -nP -i :48000
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':48000 '
Windows (Command Prompt)
netstat -ano | findstr :48000
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 48000 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 48000
From Windows
Test-NetConnection HOST -Port 48000
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 48000

Block port 48000 in the firewall

ufw
sudo ufw deny 48000/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 48000 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 48000 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 48000' -Direction Inbound -Protocol TCP -LocalPort 48000 -Action Block
ufw
sudo ufw deny 48000/udp
iptables
sudo iptables -A INPUT -p udp --dport 48000 -j DROP
nftables
sudo nft add rule inet filter input udp dport 48000 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 48000' -Direction Inbound -Protocol UDP -LocalPort 48000 -Action Block

Related ports

47808BACnet/IP47809presonus-ucnet48001nimspooler48002nimhub

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