KVM Iptables On Boot

[Nabeel]

I'm currently using KVM and trying to figure out how to reload/edit the 
default KVM iptable rules. I understand that I can save them 
(iptables-save) in the /etc/sysconfig/iptables and simply reload it 
rather than having to reboot each time. Where/How can I modify the 
default kvm/libvirt rules? Everything in /var/lib/libvirt/iptables and 
/etc/sysconfig/iptables is empty. The one I am most interested in 
customizing is the last two lines below.

-A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j fail2ban-SSH
-A FORWARD -d 192.168.122.0/24 -o virbr0 -m state --state 
RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s 192.168.122.0/24 -i virbr0 -j ACCEPT
-A FORWARD -i virbr0 -o virbr0 -j ACCEPT
-A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable

-overkill