HTTPfy

Port 17224 (trdp-pd)

IANA assigns port 17224 to trdp-pd: Train Realtime Data Protocol (TRDP) Process Data.

Registered (user) port, 1024-49151 UDP

Port 17224 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
trdp-pd UDP Train Realtime Data Protocol (TRDP) Process Data IEC Central Office -

Registry dates for this port: registered 2015-07-24.

Check what is listening on port 17224

Linux: UDP 17224
sudo ss -ulnp 'sport = :17224'
Linux / macOS: which process owns the port
sudo lsof -nP -i :17224
Windows (Command Prompt)
netstat -ano | findstr :17224
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 17224

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 17224

Block port 17224 in the firewall

ufw
sudo ufw deny 17224/udp
iptables
sudo iptables -A INPUT -p udp --dport 17224 -j DROP
nftables
sudo nft add rule inet filter input udp dport 17224 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 17224' -Direction Inbound -Protocol UDP -LocalPort 17224 -Action Block

Related ports

17222cpsp17223isa100-gci17225trdp-md17234integrius-stp

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