[Dnsmasq-discuss] UEFI booting not working with PXE using dnsmasq with DCHP Proxy.

[Cleandro Viana]

Hello,

I am following the instructions in the Ubuntu 24.04 - Deploy Ubuntu 24.04 through the PXE (BIOS & UEFI).
https://c-nergy.be/blog/?p=20027
Ubuntu 24.04 – Deploy Ubuntu 24.04 Server through PXE (BIOS & UEFI)<https://c-nergy.be/blog/?p=20027>
Hello World, In our previous post “Ubuntu 24.04 – Deploy Ubuntu 24.04 Desktop through PXE (BIOS & UEFI)”, we have demonstrated how to deploy Ubuntu 24.04 Desktop version through the PXE technology. Compared to Ubuntu 20.04, there are not too many changes and the installation process remains quite similar.
c-nergy.be
Thank for the guide and it helped me getting started.
After the setup, I am able to get VMs using BIOS to see the PXE menu.
However when I try a VM that uses EFI booting. It does not get the PXE menu.
I see the following in the dnsmasq.log file:

May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 PXE(ens160) 00:50:56:81:97:ca proxy
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 tags: efi-x86_64, ens160
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 bootfile name: grub/bootx64.efi
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 server name: XXXXXXx
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 next server: XXXXX
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 sent size:  1 option: 53 message-type  5
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 sent size:  4 option: 54 server-identifier  XXXXX
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 sent size:  9 option: 60 vendor-class  50:58:45:43:6c:69:65:6e:74
May  2 17:57:33 dnsmasq-dhcp[4223]: 2368437593 sent size: 17 option: 97 client-machine-id  00:42:01:99:04:1f:61:84:c6:ed:c9:76:8b:6c...
May  2 17:57:36 dnsmasq-tftp[4223]: error 8 User aborted the transfer received from YYYYYYY
May  2 17:57:36 dnsmasq-tftp[4223]: sent /tftpboot/grub/bootx64.efi to YYYYYYY

I am using DHCP proxy on the dnsmasq.conf file. Here is my dnsmasq.conf file:

------------------------------------
# Disable DNS Server
port=0

# Choose specific interface
interface=ens160
bind-interfaces

# Enable logging
log-dhcp
log-queries
log-facility=/var/log/dnsmasq.log
log-async

#dhcp-no-override

# run as DHCP proxy
dhcp-range=XXXXXXXX,proxy,255.255.255.0
dhcp-option=66,XXXXXXXX
dhcp-option=67,grub/bootx64.ini

# enable TFTP
enable-tftp
tftp-root=/tftpboot

# Provide network boot option called "Network Boot".
pxe-service=x86PC,"Network Boot",bios/pxelinux
pxe-service=X86-64_EFI,"UEFI Network Boot",grub/bootx64.efi


I have seen many posts about UEFI booting not working with DHCP proxy on the dnsmasq.conf file.
Is this true? Can you help?

Cleandro Viana


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