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Port 23272 (s102)

IANA assigns port 23272 to s102: S102 application.

Registered (user) port, 1024-49151 UDP

Port 23272 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
s102 UDP S102 application Kimmo Kymalainen -

Registry dates for this port: registered 2009-08-26.

Check what is listening on port 23272

Linux: UDP 23272
sudo ss -ulnp 'sport = :23272'
Linux / macOS: which process owns the port
sudo lsof -nP -i :23272
Windows (Command Prompt)
netstat -ano | findstr :23272
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 23272

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 23272

Block port 23272 in the firewall

ufw
sudo ufw deny 23272/udp
iptables
sudo iptables -A INPUT -p udp --dport 23272 -j DROP
nftables
sudo nft add rule inet filter input udp dport 23272 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 23272' -Direction Inbound -Protocol UDP -LocalPort 23272 -Action Block

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