iPXE chain load over squid

[robinsmidsrod]

There is, to my knowledge, no proxy support in iPXE, except for ProxyDHCP, but that's another thing. The "next-server" variable in your dhcpd.conf is pointing to a TFTP server, not an HTTP server. From what I know, TFTP does have any kind of proxy support, and it is not possible to access through a proxy (unless it's a SOCKS proxy, but iPXE doesn't support that). Are you trying to do chainloading with an HTTP proxy? That wouldn't work. The TFTP server must be available using normal routing, and so must the HTTP server. Neither of them needs to be on the local subnet, though.