2 entries are registered on port 411. It is a well-known port (0–1023) — assignments here are IANA's, and a service found on one is usually the service that was assigned it.
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 |
|---|---|---|---|---|---|
| :411 | Direct Connect Hub | TCP | File Transfer | caution | 6.3k |
| :411 | Remote MT Protocol | TCPUDP | Network Services | safe | 0 |
Direct Connect is a peer-to-peer file sharing protocol allowing users to share files over a decentralized network. Port 411 is the default port used by Direct Connect hubs, serving as the central meeting point for clients connecting to the network. These hubs coordinate user connections, manage chat and file searches, and facilitate file transfers between clients.
port 411 as Direct Connect Hub →TCP and UDP port 411 is assigned to the Remote MT Protocol.
port 411 as Remote MT Protocol →The registry says what 411 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 ':411\b'lsof -nP -iTCP:411 -sTCP:LISTENnetstat -ano | findstr :411On 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 411 — 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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