localhost:8200: what runs on it and how to open it
Port 8200 is the default port of HashiCorp Vault. How to open the UI and use dev mode safely.
Open this address: http://localhost:8200This opens on your own computer. It only works if the program is running.
localhost:8200 is HashiCorp Vault. The web UI is at localhost:8200/ui. Dev mode is only for learning, because it is not secure and forgets everything on exit.
What runs on localhost:8200
- HashiCorp Vault server or dev server
Commands to start and test port 8200
vault server -devexport VAULT_ADDR=http://127.0.0.1:8200vault statusFind what is using port 8200
Run these in a terminal on your computer. Nothing is sent to this site.
If localhost:8200 will not open
- The dev server loses its data
- Dev mode keeps everything in memory and is for testing only. Never store real secrets there.
- The UI asks for a token
- Dev mode prints a root token when it starts. A normal server uses the token or login you set up.
- Port 8200 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.
- This site can’t be reached (ERR_CONNECTION_REFUSED)
- The program is not running. Start it and keep that terminal open. See the full checklist.
- Works on your computer, not on your phone
- Start the server on all network addresses and use your computer’s IP address. See how to open localhost from your phone.
Other ports like 8200
| 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:8200
- What is dev mode?
- A quick test mode that is unsealed, in memory and not safe for real use.
- Is localhost:8200 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 8200?
- 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 8200?
- 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:8200 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.