# F5 DoS for NGINX 4.3

Type of document: Reference
Product: F5 DOS for NGINX

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Here you can find the release information for F5 DoS for NGINX v4.3. F5 DoS for NGINX provides behavioral protection against Denial of Service (DoS) for your web applications.

## Release 4.3

December 19, 2023

In this release, F5 DoS for NGINX supports NGINX Plus R31.

### New Features

- Support for Nginx Plus R31
- [Support for Alpine 3.17](learn-about-deployment.md#alpine-315x--317x-installation)

### Supported Packages

#### App Protect DoS

##### Alpine 3.17

- app-protect-dos-31.4.3.1-r1.apk

##### CentOS 7.4+ / RHEL 7.4+ / UBI7

- app-protect-dos-31.4.3.1-1.el7.ngx.x86_64.rpm

##### RHEL 8 and Rocky Linux 8

- app-protect-dos-31.4.3.1-1.el8.ngx.x86_64.rpm

##### Debian 11

- app-protect-dos_31.4.3.1-1~bullseye_amd64.deb

##### Ubuntu 20.04

- app-protect-dos_31.4.3.1-1~focal_amd64.deb

##### Ubuntu 22.04

- app-protect-dos_31.4.3.1-1~jammy_amd64.deb

#### NGINX Plus

- NGINX Plus R31

### Important Note

- Starting with this release, Alpine 3.15 support has been deprecated.