Reach TFTP through Router with DHCP

[N-kay]

Hello, I want to boot from network to the TFTP Server from FreeNAS7 to install OS's from there or boot other thinks, but I think my FRITZ!Box Fon WLAN 7320 is making trouble with it's DHCP-Server, maybe because it doesn't support PXE or so?
I can't just set the FreeNAS as DHCP-Server, because it isn't running all the time, so, can someone please help me?

Greetings,
N-kay

 

[ProtoSD]

Just to confirm, did you say/mean FreeNAS 7?? If so you need to post in the FreeNAS 7 forums, there's a link in the titlebar at the top of the page. There a BIG difference between .7 and 8, so let us know if you really meant 8.