CSF replacement tested in old Centos 7, AlmaLinux 8.10 and AlmaLinux 9.6The CSF project is continuing as Open Source project, the website is here: https://docs.configserver.dev/ Github: https://github.com/Aetherinox/csf-firewall And as it was suggested in article https://www.jaspreet.net/2025/09/06/3180/how-to-fix-csf-firewall-error-oops-unable-to-download-no-host-option-provided/ you have to update the content of /etc/csf/downloadserver Comment out (or delete) the old content of the file and set the new line of download server: download.configserver.dev Restart CSF and from the GUI of CWP update Firewall. The result will be appear in the screen, and the CFS/LFD will update to the current version: Status: csf: v15.01 (CentOS Web Panel) Or, you can use the solution suggested by @Starburst above.