I noticed this morning the iptables firewall was not starting due to the fact that I rebuilt the kernel and forgot to include the relevent Netfilter modules. So I added those and rebooted. The firewall still fails, but rather that referring to the non-available ip_tables module, it now just says iptables.init: iptables: Applying firewall rules: iptables-restore: line 13 failed.
Importing iptables Configurations Into Firewall Builder
Firewall Builder is a firewall configuration and management GUI
that supports configuring a wide range of firewalls from a
single application. Supported firewalls include Linux iptables,
BSD pf, Cisco ASA/PIX, Cisco router access lists and many