@ManofValor I think Tom’s guess is right, It makes sense.
To be honest, there appears to be absolutely nothing wrong with any of the network configuration on your FOG server.
We can test to see if Tom’s guess is right or not. If this CentOS 7 was installed with a GUI, it came with Firefox. Use firefox to try to visit our forums. If you can, Tom is right - and it also means that only ports 53, 80, and 443 are allowed into your network. IF this is the case, you’ll need your boss to loosen the straps so you can get your FOG server going - after that, he can tighten em down again. Or he can create rules that allow the FOG server full access to the internet. If it were up to me, I wouldn’t have a firewall that prevents work from being done. Do you guys have a demilitarized zone the fog server can be placed in temporarily so it can be installed and configured?