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# hadolint/DL3011

> Valid UNIX ports range from 0 to 65535.

Valid UNIX ports range from 0 to 65535.

| Property | Value       |
| -------- | ----------- |
| Severity | Error       |
| Category | Correctness |
| Default  | Enabled     |

## Description

Valid UNIX ports range from 0 to 65535. Exposing a port outside this range is invalid and will result in an error.

## Examples

### Problematic code

```dockerfile theme={null}
FROM busybox
EXPOSE 80000
```

### Correct code

```dockerfile theme={null}
FROM busybox
EXPOSE 65535
```

## Reference

* [hadolint/DL3011](https://github.com/hadolint/hadolint/wiki/DL3011)