Go to https://rom-o-matic.eu

Click the drop down and choose
UNDI only (.kpxe)

Paste this script into the script box:

#!ipxe dhcp cpuid --ext 29 && set arch x86_64 || set arch i386 params param mac0 ${net0/mac} param arch ${arch} param product ${product} param manufacturer ${product} param ipxever ${version} param filename ${filename} isset ${net1/mac} && param mac1 ${net1/mac} || goto bootme isset ${net2/mac} && param mac2 ${net2/mac} || goto bootme :bootme chain http://10.50.0.48/fog/service/ipxe/boot.php##params

Click Proceed, save the new undionly.kpxe, transfer it to your FOG server’s /tftpboot and give it another whirl.