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Port 17225 (trdp-md)

IANA assigns port 17225 to trdp-md: Train Realtime Data Protocol (TRDP) Message Data.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
trdp-md TCP Train Realtime Data Protocol (TRDP) Message Data IEC Central Office -
trdp-md UDP Train Realtime Data Protocol (TRDP) Message Data IEC Central Office -

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

Check what is listening on port 17225

Linux: is anything listening on TCP 17225?
sudo ss -tlnp 'sport = :17225'
Linux: UDP 17225
sudo ss -ulnp 'sport = :17225'
Linux / macOS: which process owns the port
sudo lsof -nP -i :17225
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':17225 '
Windows (Command Prompt)
netstat -ano | findstr :17225
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 17225 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 17225
From Windows
Test-NetConnection HOST -Port 17225
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 17225

Block port 17225 in the firewall

ufw
sudo ufw deny 17225/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 17225 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 17225 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 17225' -Direction Inbound -Protocol TCP -LocalPort 17225 -Action Block
ufw
sudo ufw deny 17225/udp
iptables
sudo iptables -A INPUT -p udp --dport 17225 -j DROP
nftables
sudo nft add rule inet filter input udp dport 17225 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 17225' -Direction Inbound -Protocol UDP -LocalPort 17225 -Action Block

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17223isa100-gci17224trdp-pd17234integrius-stp17235ssh-mgmt

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