[CentOS] Ovirt Hosted-Engine VM iptables

Hi

I would like to add rules into the iptables of the Hosted Engine VM in 
Ovirt.

the version is oVirt Engine Version: 4.1.1.8-1.el7.centos
I have tried using the normal process for iptables (iptables-save etc), 
but it seems that the file
/etc/sysconfig/iptables
this is ignored in the Ovirt Engine VM.
How can I add permanent rules into the Engine VM?

Kind regards



Andrew