OK!!! I think we have something here. So I finally figured out that part of the problem seems to be in the firewall zone as specified in the Centos 7 Setup guide. The issue I think stems from that the
public zone seems to be blocking the multicast ports. I even explicitly told the firewalld daemon to add the interface
em2 to the
trusted zone, but it never did unless I manually specified in the NIC interface file
ZONE=trusted. This seems to be a bug of sorts in that project.
I suppose that you could also specify a port range for the firewalld daemon to allow through. In my case the NIC hosting the FOG Server is segregated my other network. So in this case I don’t care to have all ports open on that interface because there is no reason to block that traffic. Keep in mind the interface
em1 is still in the
public zone and more locked down and restricted.
The result seems to be that I am now able get it to consistently image across at least two devices and so far it has persisted across device and server reboots. So I think we have made a good leap in that regards. I will keep checking back here for a few days to try and update if I run into issues.