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Port 3196 (ncu-2)

IANA assigns port 3196 to ncu-2: Network Control Unit.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ncu-2 TCP Network Control Unit Charlie Hundre -
ncu-2 UDP Network Control Unit Charlie Hundre -

Check what is listening on port 3196

Linux: is anything listening on TCP 3196?
sudo ss -tlnp 'sport = :3196'
Linux: UDP 3196
sudo ss -ulnp 'sport = :3196'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3196
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3196 '
Windows (Command Prompt)
netstat -ano | findstr :3196
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3196 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3196
From Windows
Test-NetConnection HOST -Port 3196
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3196

Block port 3196 in the firewall

ufw
sudo ufw deny 3196/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3196 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3196 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3196' -Direction Inbound -Protocol TCP -LocalPort 3196 -Action Block
ufw
sudo ufw deny 3196/udp
iptables
sudo iptables -A INPUT -p udp --dport 3196 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3196 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3196' -Direction Inbound -Protocol UDP -LocalPort 3196 -Action Block

Related ports

3194magbind3195ncu-13197embrace-dp-s3198embrace-dp-c

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