2 entries are registered on port 752. 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 |
|---|---|---|---|---|---|
| :752 | Kerberos kpasswd Server | UDP | Security | safe | 7.3k |
| :752 | QRH | TCP | Security | caution | 4.9k |
Kerberos Password Change (kpasswd) Server — Port 752 is primarily used by the Kerberos authentication protocol to handle password changes securely. The service facilitates secure communication between clients wishing to update their passwords and the Kerberos authentication infrastructure, maintaining strong user identity management within enterprise environments.
port 752 as Kerberos kpasswd Server →QRH is a network port associated with the official assignment of port 752, primarily used for secure routing control applications such as kerberos_load and userreg. While it is uncommon in everyday networking, it contributes to routing authentication and management. Its usage is generally confined to specialized network infrastructure services.
port 752 as QRH →The registry says what 752 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 ':752\b'lsof -nP -iTCP:752 -sTCP:LISTENnetstat -ano | findstr :752On 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 752 — 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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