# bunkerized-nginx
nginx based Docker image secure by default.

## Main features
- HTTPS support with transparent Let's Encrypt automation
- State-of-the-art web security : HTTP headers, php.ini hardening, version leak, ...
- Integrated ModSecurity WAF with the OWASP Core Rule Set
- Based on alpine and compiled from source (< 100 MB image)
- Easy to configure with environment variables

## Quickstart guide

### Run HTTP server with default settings

```shell
docker run -p 80:80 -v /path/to/web/files:/www bunkerity/bunkerized-nginx
```

Web files are stored in the /www directory, so you need to mount the volume on it.

### Run HTTPS server with automated Let's Encrypt
```shell
docker run -p 80:80 -p 443:443 -v /path/to/web/files:/www -e SERVER_NAME=www.yourdomain.com -e AUTO_LETS_ENCRYPT=yes bunkerity/bunkerized-nginx
```

Let's Encrypt needs port 80 to be open to request and sign certificates but nginx will only listen on port 443.

## List of variables

### nginx security
*SERVER_TOKENS*
Values : on | off
Default value : off
If set to on, nginx will display server version in Server header and default error pages.

*HEADER_SERVER*
Values : yes | no
Default value : no
If set to no, nginx will remove the Server header in HTTP responses.

*ALLOWED_METHODS*
Values : allowed HTTP methods separated with | char
Default value : GET|POST|HEAD
Only the HTTP methods listed here will be accepted by nginx. If not listed, nginx will close the connection.

*DISABLE_DEFAULT_SERVER*
Values : yes | no
Default value : no
If set to yes, nginx will only respond to HTTP request when the Host header match the SERVER_NAME. For example, it will close the connection if a bot access the site with direct ip.

### Security headers
*X_FRAME_OPTIONS*
Values : DENY | SAMEORIGIN | ALLOW-FROM https://www.website.net | ALLOWALL
Default value : DENY
Policy to be used when the site is displayed through iframe. Can be used to mitigate clickjacking attacks.
More info [here](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options).

*X_XSS_PROTECTION*
Values : 0 | 1 | 1; mode=block
Default value : 1; mode=block
Policy to be used when XSS is detected by the browser. Only works with Internet Explorer.
More info [here](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection).

*X_CONTENT_TYPE_OPTIONS*
Values : nosniff
Default value : nosniff
Tells the browser to be strict about MIME type.
More info [here](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options).

*REFERRER_POLICY*
Values : no-referrer | no-referrer-when-downgrade | origin | origin-when-cross-origin | same-origin | strict-origin | strict-origin-when-cross-origin | unsafe-url
Default value : no-referrer


*TODO : list variables, default value, explanation, ...*

## TODO
- File permissions hardening
- Secure and HttpOnly cookies
- Custom nginx configuration
- Custom TLS certificates
- Documentation
- Reverse proxy mode