Pick a random port number in your browser — handy for local dev and containers.
| 端口 | 服务 | 端口 | 服务 |
| 80 | HTTP | 443 | HTTPS |
| 22 | SSH | 3306 | MySQL |
| 5432 | PostgreSQL | 6379 | Redis |
| 8080 | HTTP 备用 | 3000 | Node 开发 |
| 27017 | MongoDB | 9200 | Elasticsearch |
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Port range | 0-65535; ports 0-1023 are privileged | RFC 6335 |
| Ephemeral range | IANA suggests 49152-65535 for dynamic allocation | RFC 6335 |
| Conflict check | still verify local availability before binding | RFC 6335 |