Is the nfs-server running? What is the output of the following?

[CODE]systemctl status nfs-server[/CODE]

If it is not running, run the following:
[CODE]systemctl enable nfs-server
systemctl start nfs-server[/CODE]

You should test this with iptables and selinux disabled first to make sure everything works as expected.

To get multicast working on CentOS7 you’ll need to modify the following line in function getIPAddress in /var/www/html/fog/lib/fog/FOGCore.class.php

from:
[CODE]exec(“/sbin/ifconfig | grep ‘[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}’| cut -d’:’ -f 2 | cut -d’ ’ -f1”, $arR, $retVal);[/CODE]

to:
[CODE]exec(“/sbin/ip addr | grep -o ‘[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}/[0-9]{1,2}’ | cut -d/ -f1”, $arR, $retVal);[/CODE]

If you have multiple interfaces with IP addresses you might need to use the following in the first portion of that line

[CODE]/sbin/ip addr list eth0[/CODE]

Replace eth0 with the interface you use for fog.

I haven’t tested this with Ubuntu but if the system has iproute2 package installed it should work.