# F5 DoS for NGINX 4.9

Type of document: Reference
Product: F5 DOS for NGINX
> Release notes for F5 DoS for NGINX 4.9, including new platform support for Debian 13, RHEL 10, Rocky Linux 10, and NGINX Plus R37.

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F5 DoS for NGINX provides behavioral protection against Denial of Service (DoS) attacks for your web applications.

## Release 4.9

May 13, 2026

### New features

- NGINX Plus R37 support
- Debian 13 (Trixie) support
- RHEL 10 and Rocky Linux 10 support
- Bug fixes

### Supported packages

| Distribution name        | Package file                                         |
|--------------------------|------------------------------------------------------|
| Alpine 3.21              | _app-protect-dos-37+4.9.6-r1.apk_                    |
| Alpine 3.22              | _app-protect-dos-37+4.9.6-r1.apk_                    |
| Amazon Linux 2023        | _app-protect-dos-37+4.9.6-1.amzn2023.ngx.x86_64.rpm_ |
| RHEL 8 and Rocky Linux 8 | _app-protect-dos-37+4.9.6-1.el8.ngx.x86_64.rpm_      |
| RHEL 9 and Rocky Linux 9 | _app-protect-dos-37+4.9.6-1.el9.ngx.x86_64.rpm_      |
| RHEL 10 and Rocky Linux 10 | _app-protect-dos-37+4.9.6-1.el10.ngx.x86_64.rpm_   |
| Debian 11                | _app-protect-dos_37+4.9.6-1\~bullseye_amd64.deb_     |
| Debian 12                | _app-protect-dos_37+4.9.6-1\~bookworm_amd64.deb_     |
| Debian 13 (Trixie)       | _app-protect-dos_37+4.9.6-1\~trixie_amd64.deb_       |
| Ubuntu 22.04             | _app-protect-dos_37+4.9.6-1\~jammy_amd64.deb_        |
| Ubuntu 24.04             | _app-protect-dos_37+4.9.6-1\~noble_amd64.deb_        |
| NGINX Plus               | _NGINX Plus R37_                                     |