SOLVED: PXE-E18: Server response timeout.

[The_JF]

So I'm trying to PXE boot a Lenovo P53, but I get an PXE-E18: Server response timeout error. It finds the right IP adress and even the file, but the filesize is 0 Bytes. We usually do that over lan where the local mdt server is located and it's working just fine. Now when I'm sitting in another office with two different DHCP. We have a VPN set up through our Meraki firewall for the internal traffic between HQ and satellite offices. The HQ firewall is Clavister. I checked with Wireshark that my connection requests are coming through on port 67, 68, 69 and 4011 and I got 6 requests on port 69. We have also changed the packet size allowance between the mdt server and vpn. Bios settings are set to UEFI boot only, bios version is the latest

Any thoughts or ideas on how to proceed in this troubleshooting?

[The_JF]

Solved:

We opened up a lot of dynamic ports from the MDT server side towards our satellite office. The firewall in our HQ was dropping traffic on some ports.