@montesd Ok for that old version of FOG, you need to be on FOS Linux version 4.12.x to have the driver for the I219-LM or i219-V network cards. You can manually download the kernels from here: https://fogproject.org/kernels/
You will want to download
Kernel.TomElliott.4.12.3.64 and save it as bzImage
and
Kernel.TomElliott.4.12.3.32 and save it as bzImage32
Watch your case because it is important. These files go into /var/www/heml/fog/service/ipxe directory. Rename the existing files in case you have to back up.
Also you can try the latest kernels with
Kernel.TomElliott.4.19.64.64 and Kernel.TomElliott.4.19.64.21.32 but there is no grantee that they will work with the older inits (YMMV). These would latest kernels would supported the newest hardware with the risk of incompatibility with the inits (FOS Linux virtual hard drive).