This appears to be the same issue as my report of failed PXE in bug #544377 "PXE Error: Only absolute filenames allowed" and is caused by the tftpd-hpa daemon not being started with --secure (-s) mode.
I added it to /etc/default/tftpd-hpa: TFTP_OPTIONS="-s" -- pxe boot with tftpd-hpa failed with error: Forbidden Directory https://bugs.launchpad.net/bugs/531123 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to tftp-hpa in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs