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Port 8111 (skynetflow)

IANA assigns port 8111 to skynetflow: Skynetflow network services.

Registered (user) port, 1024-49151 UDP

Port 8111 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
skynetflow UDP Skynetflow network services skynetflow.com -

Registry dates for this port: registered 2019-05-28.

Check what is listening on port 8111

Linux: UDP 8111
sudo ss -ulnp 'sport = :8111'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8111
Windows (Command Prompt)
netstat -ano | findstr :8111
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 8111

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8111

Block port 8111 in the firewall

ufw
sudo ufw deny 8111/udp
iptables
sudo iptables -A INPUT -p udp --dport 8111 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8111 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8111' -Direction Inbound -Protocol UDP -LocalPort 8111 -Action Block

Related ports

8101ldoms-migr8102kz-migr8115mtl8000-matrix8116cp-cluster

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