Help getting an image downloaded from a Laptop



  • Hey all,
    Im a newer FOG User and recently I’ve been having troubles trying to get an image to download from a laptop. We are trying to image a bulk amount of laptops for LAN party uses.

    For starters we are running an Untangled Firewall as our DHCP server which then leases IPs from an HP Switch. An IP is then Leased to our FOG server and to the laptop from the switch.

    I am able to get the laptop to search for a DHCP in PXE. It does not find the Fog boot file. I already have it registered as a host but I cant get FOG to download the image from the laptop.

    The laptop is a Gateway model m285-e if that makes any difference.

    Any help would be great!!

    Thank you all


  • Moderator

    @FiskTechLV What exactly is the PXE rom reporting as an error code? It should be a EXX-XXXX like error code.

    The next step is going to be a little involved, but it will give us a better idea of what is going on in your network. As long as the fog server and target computer are on the same subnet you can run this command from the fog server. Make sure tcpdump is installed on your fog server then run this command.

    tcpdump -w /tmp/bootup.pcap port 67 or port 68 or port 69

    Then pxe boot that target computer until you get the pxe boot failure. Once you reach the error then stop tcpdump and post the pcap file here. I might also suggest if you have some networking skills, load the pcap file into wireshark and see if you can spot the error. But also post the pcap here.


  • Moderator

    @FiskTechLV have you looked at any of our wiki articles about dhcp? We have none for untangled but still the information in there will apply if you know dhcp and how to translate the configuration to your untangled server.

    Additionally if your new to all this, you might just put aside untangled and use the fog server for dhcp, it’ll set it up for you. It’s an installation option.



  • @george1421 I have them set up now but im still getting the same thing Im wondering if i put in the options wrong…



  • @george1421 Nope I dont have either of them set. Ill have to get those set up with Untangled.


  • Moderator

    @FiskTechLV OK as long as the IP address doesn’t change on the fog server that is good enough.

    Now what about the dhcp options 66 and 67?



  • @george1421 The Fog server is leasing a Static ip from my Untangled server.


  • Moderator

    Also you will have troubles if your fog server is getting its ip address via dhcp. The fog server must have a static IP address. This MUST BE SET before you install fog.

    Beyond that as long as your target computer supports pxe booting it should work.


  • Moderator

    When you setup the dhcp server did you set dhcp options 66 and 67? If so did you enter the FGG server IP address for dhcp option 66 and undionly.kpxe for option 67?


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