2 entries are registered on port 4323. It is a registered port (1024–49151) — IANA records an assignee, but nothing stops other software from listening here, which is why the number carries more than one entry.
services registered on this number
2 transports in use
entries encrypted on the wire
1 of 2 iana-registered
| port | service | proto | category | risk | views |
|---|---|---|---|---|---|
| :4323 | ArcLink/XT | UDP | Network Services | caution | 8.8k |
| :4323 | TRIM ICE Service | TCPUDP | — | safe | 0 |
Lincoln Electric's ArcLink/XT is a communication protocol used primarily in industrial environments to facilitate data exchange between welding equipment and control systems. Designed to optimize manufacturing workflows, this protocol leverages UDP transport to ensure low-latency and real-time communication needed for precision welding operations.
port 4323 as ArcLink/XT →A little-documented TRIM ICE service assignment on TCP/4323 and UDP/4323, with no established common deployment known.
port 4323 as TRIM ICE Service →The registry says what 4323 is registered to. What is listening on it right now is decided by the host, and only the host can be asked. Each of these prints the process behind the socket.
ss -ltnp | grep ':4323\b'lsof -nP -iTCP:4323 -sTCP:LISTENnetstat -ano | findstr :4323On Linux and Windows the process name comes back with the socket; on macOS lsof needs sudo to name a process that isn't yours. Match what it prints against the 2 entries above.
A port number is not a service. Anything may listen on 4323 — what you actually met is decided by the host, not the registry. If a service is missing here, it belongs in the registry.
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