From https://theforeman.org/manuals/3.5/quickstart_guide.html

Foreman Options

#!/bin/bash

foreman-installer \
 --enable-foreman-proxy \
 --foreman-proxy-tftp=true \
 --foreman-proxy-tftp-servername=192.168.2.6 \
 --enable-foreman-compute-vmware \
 --foreman-proxy-dns=true \
 --foreman-proxy-dns-zone=lab.bpopp.net \
 --foreman-proxy-dns-provider=nsupdate \
 --foreman-proxy-dns-server=192.168.2.1 \
 --foreman-proxy-dhcp=true  \
 --foreman-proxy-dhcp-managed=true \
 --foreman-proxy-dhcp-gateway="192.168.2.1" \
 --foreman-proxy-dhcp-nameservers="192.168.2.1" \
 --foreman-proxy-dhcp-range="192.168.2.175 192.168.2.220"