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Port 314 (opalis-robot)

IANA assigns port 314 to opalis-robot: Opalis Robot.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
opalis-robot TCP Opalis Robot Laurent Domenech -
opalis-robot UDP Opalis Robot Laurent Domenech -

Check what is listening on port 314

Linux: is anything listening on TCP 314?
sudo ss -tlnp 'sport = :314'
Linux: UDP 314
sudo ss -ulnp 'sport = :314'
Linux / macOS: which process owns the port
sudo lsof -nP -i :314
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':314 '
Windows (Command Prompt)
netstat -ano | findstr :314
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 314 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 314
From Windows
Test-NetConnection HOST -Port 314
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 314

Block port 314 in the firewall

ufw
sudo ufw deny 314/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 314 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 314 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 314' -Direction Inbound -Protocol TCP -LocalPort 314 -Action Block
ufw
sudo ufw deny 314/udp
iptables
sudo iptables -A INPUT -p udp --dport 314 -j DROP
nftables
sudo nft add rule inet filter input udp dport 314 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 314' -Direction Inbound -Protocol UDP -LocalPort 314 -Action Block

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