@austwhite : See page 22 of this thread. Someone reposted the tools on mediafire.
On my side, i am trying to unbrick my VTH2621.
Looks like the dr, dk, etc... are not set on this device...
See the logs:
Tftp print, localip:'192.168.1.108', serverip:'192.168.254.254', netmask:'255.255.255.0'...