The Sensu backend uses:
- 2379 (TCP) Sensu storage client listener: Required for Sensu backends using an external etcd instance
- 2380 (HTTP/HTTPS) Sensu storage peer listener: Required for other Sensu backends in a cluster
- 3000 (HTTP/HTTPS) Sensu dashboard: Required for all Sensu backends using a Sensu dashboard
- 8080 (HTTP/HTTPS) Sensu API: Required for all users accessing the Sensu API
- 8081 (WS/WSS) Agent API: Required for all Sensu agents connecting to a Sensu backend