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Port 6324 (hrd-ncs, hrd-ns-disc)

IANA assigns port 6324 to hrd-ncs, hrd-ns-disc: HR Device Network Configuration Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hrd-ncs TCP HR Device Network Configuration Service Hall Research -
hrd-ns-disc UDP HR Device Network service Hall Research -

Registry dates for this port: registered 2011-11-29.

Check what is listening on port 6324

Linux: is anything listening on TCP 6324?
sudo ss -tlnp 'sport = :6324'
Linux: UDP 6324
sudo ss -ulnp 'sport = :6324'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6324
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6324 '
Windows (Command Prompt)
netstat -ano | findstr :6324
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6324 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6324
From Windows
Test-NetConnection HOST -Port 6324
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6324

Block port 6324 in the firewall

ufw
sudo ufw deny 6324/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6324 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6324 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6324' -Direction Inbound -Protocol TCP -LocalPort 6324 -Action Block
ufw
sudo ufw deny 6324/udp
iptables
sudo iptables -A INPUT -p udp --dport 6324 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6324 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6324' -Direction Inbound -Protocol UDP -LocalPort 6324 -Action Block

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