On 2/14/24 10:22, Miroslaw Dach wrote: > Does anybody have any advice? Hi Mirek, Have you tried with a CLI TFTP client? Since TFTP is generally seen as wildly insecure these days, default distro. installs of TFTPd tend to be restrictive. cf. "man tftpd" and compare with your running daemon. https://linux.die.net/man/8/tftpd