Boot image over http using only NETBOOT?

[robinsmidsrod]

If you want to be able to boot machines without any local config you need to setup your network for PXE booting. That includes having both a DHCP server and a TFTP server on your network which you can configure as you need. There are some articles on http://networkboot.org/ that should help you out in getting it set up on either Windows or Linux. If you want to try to use your router for that you need to check its documentation if it is capable of supporting PXE booting.

If it doesn't support the setup for chainloading you can build an ipxe binary with an embedded script that breaks the infinite boot loop explained in http://ipxe.org/howto/chainloading.