To configure the filename and next-server details for DHCP in Fortigate firewall for IPv4 BOOTP/PXE, follow the steps given below:

1. From your Fortigate firewall interface, navigate to Interfaces.
2. Open Command Line Interface (CLI) and enter the following command:
3. The next-server IP refers to the IP address of the computer where the central server or distribution server is installed.
4. 
5. The filename must be set as EFI\\Boot\\bootx64.efi for UEFI 64-bit machines or boot\\pxeboot.n12 for legacy BIOS machines.
6. For example:
   

Related Documents:

• How to configure DHCP server for PXE?
• What is PXE (Preboot Execution Environment)?