01RLM License Servertcp · iana-registered · risk 5/10
RLM License Server uses TCP port 5053 for software license management.
port 5053 as RLM License Server →Port 50532 services
2 entries are registered on port 5053. 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.
- entries
- 2
- transport
- tcp · udp
- in transit
- 0/2
- worst risk
- 5/10
services registered on this number
2 transports in use
entries encrypted on the wire
2 of 2 iana-registered
Services on this port
| port | service | risk | |||
|---|---|---|---|---|---|
| :5053 | RLM License Server | TCP | Network Services | caution | 0 |
| :5053 | Reprise License Manager Discovery | UDP | Network Services | safe | 0 |
02Reprise License Manager Discoveryudp · iana-registered · risk 2/10
UDP 5053 is used by Reprise License Manager clients to discover license servers on a local network.
port 5053 as Reprise License Manager Discovery →Which one is on your host
The registry says what 5053 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.
- linux
ss -ltnp | grep ':5053\b'- macos
lsof -nP -iTCP:5053 -sTCP:LISTEN- windows
netstat -ano | findstr :5053
On 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 5053 — 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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