Hi,
The strict policies are intended only for external interfaces (WAN), if you setup a DHCP server you should do it listening on an internal one.
ebox-all is an empty metapackage, you have to uninstall the ebox package (I recommend with --purge option), and also libebox if you want to purge the configuration. All remaining packages will be also removed as they depend on ebox.
Regards,
J. A. Calvo