@Backpain This looks like a normal FOG config file. It is setup exactly how you need it.
So let me ask a bit more about your network.
1, It looks like all devices (fog server, pxe booting computer) are on the same subnet. Is that correct?
2. If yes is that vlan 4 an isolated network used just for imaging or is it a general purpose vlan with many types of devices on it?
3. Is there any chance another dhcp server is responding to the pxe boot requests? Either by a dhcp-relay / helper service on your vlan router or by directly having a second dhcp server on your network?
Beyond the questions, I think our next step is to see if we can get a packet capture of the pxe booting process to see where the client is being directed and by whom. I have a tutorial here: https://forums.fogproject.org/topic/9673/when-dhcp-pxe-booting-process-goes-bad-and-you-have-no-clue?_=1673391869214
Upload the pcap to a file share site and post the link here and I’ll take a look at it. If you want to review it yourself, use wireshark to open the pcap file. Look at the dhcp OFFER packet. This will be from your dhcp server. Look at the dhcp header for the next-server and boot-file fields. They should contain data… but there are two many what-ifs here, its probably best to let me look at it