Pxeboot Debian 8.8 livecd with http.

  - Download debian-live-8.8.0-amd64-standard.iso from Debian's website
  - Extract these three files from the iso and upload them to your web server.
    * vmlinuz
    * initrd.img
    * filesystem.squashfs
  - Use the following ipxe config.

<code ipxe debian.ipxe>
#!ipxe
kernel http://192.168.10.10/boot_templates/debian_8.8/live/vmlinuz
initrd http://192.168.10.10/boot_templates/debian_8.8/live/initrd.img
imgargs vmlinuz boot=live config hooks=filesystem username=live noeject fetch=http://192.168.10.10/boot_templates/debian_8.8/live/filesystem.squashfs
boot
</code>

If you want to customize this livecd you can always modify your squashfs image and add ssh authorized key or any custom things that you want to run. Enjoy!