# F5 DoS for NGINX 4.9


> 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.


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_                                     |