Port 43189 (ndm-agent-port)

IANA assigns port 43189 to ndm-agent-port: NDM-AGENT-PORT.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ndm-agent-port TCP NDM-AGENT-PORT Roman Kriis -

ndm-agent-port UDP NDM-AGENT-PORT Roman Kriis -

Linux: is anything listening on TCP 43189?

sudo ss -tlnp 'sport = :43189'

Linux: UDP 43189

sudo ss -ulnp 'sport = :43189'

Linux / macOS: which process owns the port

sudo lsof -nP -i :43189

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':43189 '

Windows (Command Prompt)

netstat -ano | findstr :43189

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 43189 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 43189

From Windows

Test-NetConnection HOST -Port 43189

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 43189

ufw

sudo ufw deny 43189/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 43189 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 43189 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 43189' -Direction Inbound -Protocol TCP -LocalPort 43189 -Action Block

ufw

sudo ufw deny 43189/udp

iptables

sudo iptables -A INPUT -p udp --dport 43189 -j DROP

nftables

sudo nft add rule inet filter input udp dport 43189 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 43189' -Direction Inbound -Protocol UDP -LocalPort 43189 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.