I’ve left out important details from the post above.
The above firewall module versions require ipset. On FreePBX Distro version 12+, this is installed by default, but ver. 10.13. it needs to be installed:
# fwconsole ma install firewall
Latest firewall module is depends on 'ipset' utility which is missing so please install this by either 'yum install ipset -y' for distro(centos) or equivalent package install command as per your OS and try again.
Generating CSS...Done
Module firewall successfully installed
Updating Hooks...Done
# yum install ipset -y
Loaded plugins: downloadonly, fastestmirror, kmod, security
Setting up Install Process
*snip*
Installed:
ipset.x86_64 0:6.11-3.el6
Dependency Installed:
libmnl.x86_64 0:1.0.2-3.el6
Complete!