Hello! I do have RB751U-2HnD and 5.12 OS version.

Recently activated TFTP server for Boot From Lan option. Used pxelinux.0 kernel.

I was able to successfully boot to menu, but every image I try to load freeze the system.
The same data uploaded to another TFTP server (for instance running windows 7 + tftpd32) works perfectly.

I understand TFTP uses UDP data, can this is be some kind of UDP packets filtering or something, cause it's really looks like packet loss/corruption.

Thanks.