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Port 3227 (dwnmshttp)

IANA assigns port 3227 to dwnmshttp: DiamondWave NMS Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dwnmshttp TCP DiamondWave NMS Server - -
dwnmshttp UDP DiamondWave NMS Server - -

Check what is listening on port 3227

Linux: is anything listening on TCP 3227?
sudo ss -tlnp 'sport = :3227'
Linux: UDP 3227
sudo ss -ulnp 'sport = :3227'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3227
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3227 '
Windows (Command Prompt)
netstat -ano | findstr :3227
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3227 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3227
From Windows
Test-NetConnection HOST -Port 3227
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3227

Block port 3227 in the firewall

ufw
sudo ufw deny 3227/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3227 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3227 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3227' -Direction Inbound -Protocol TCP -LocalPort 3227 -Action Block
ufw
sudo ufw deny 3227/udp
iptables
sudo iptables -A INPUT -p udp --dport 3227 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3227 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3227' -Direction Inbound -Protocol UDP -LocalPort 3227 -Action Block

Related ports

3225fcip-port3226isi-irp3228dwmsgserver3229global-cd-port

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