localhost:9092: what runs on it and how to open it
Port 9092 is the default Kafka broker port. How to test it and fix connection errors.
Not a web pagePort 9092 is the Apache Kafka broker. Use a Kafka client, not a normal browser tab.
localhost:9092 is not a web page. It is the port Kafka clients use to reach a broker. Opening it in a browser shows nothing useful.
What runs on localhost:9092
- Apache Kafka broker
Commands to start and test port 9092
kafka-topics.sh --bootstrap-server localhost:9092 --listkafka-topics.sh --bootstrap-server localhost:9092 --create --topic testnc -vz localhost 9092Find what is using port 9092
Run these in a terminal on your computer. Nothing is sent to this site.
If localhost:9092 will not open
- The client connects, then fails
- Kafka sends back the address from advertised.listeners. If it is not reachable by the client, set it to a name or address the client can use.
- Port 9092 is already in use
- Another program is on this port. Find it with the tool below and stop it, or start yours on another port.
- Connection refused on port 9092
- The service is not running, or it listens on another port. Start it and check the port in its settings.
Other ports like 9092
| Port | Usually used by |
|---|---|
| localhost:11434 | Ollama (AI models) |
| localhost:5601 | Kibana |
| localhost:11501 | Not a standard port: check what is using it |
| localhost:9200 | Elasticsearch |
| localhost:5672 | RabbitMQ |
| localhost:15672 | RabbitMQ admin page |
| localhost:9090 | Prometheus |
Questions about localhost:9092
- Why does the browser show nothing?
- Kafka uses its own protocol, not HTTP.
- Is localhost:9092 safe?
- Yes, as long as it stays on localhost. Only your own computer can reach it. It becomes reachable from other devices only if you start the program on 0.0.0.0 or your computer's IP address. Do not put development or admin tools on the public internet.
- Can I use a different port instead of 9092?
- Yes. Most programs let you choose the port with a setting or a command option. Pick a free port above 1024 and open that number instead.
- How do I check what is using port 9092?
- Use the port checker on this page. It shows the command for Windows, macOS and Linux and does not send anything to this site.
- Can I open localhost:9092 from my phone?
- Yes, if both are on the same Wi-Fi. Start the program so it listens on all addresses, then open your computer's IP address with the port on the phone. A firewall on the computer can still block it.
Free tools that help
- Common ports listSearch a list of common TCP and UDP port numbers: SSH 22, HTTP 80, HTTPS 443, MySQL 3306, PostgreSQL 5432 and more, with dev server ports.