Prometheus default password & login
Time-series monitoring system. Ships with NO authentication — put it behind a reverse proxy with auth, or enable basic-auth in 2.24+.
Use these credentials for the very first login to Prometheus only. The full vendor documentation linked below explains how to rotate them and harden the install.
Notes & recovery
Enable HTTPS + basic auth via web.config.file. Never expose 9090 directly to the internet.
Official documentation →Change the default immediately
Anyone with internet access can try the published default on Prometheus. Set a strong, unique password the moment you finish first-time setup, ideally before exposing the service to your LAN.
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