Debian on LS-XL

[vlotho]

Hi,
I tried to install debian by following this tutorial: http://buffalo.nas-central.org/wiki/Ins ... _the_LS-XL.
Everything goes correctly to start tftp server, even if I have to run on port 70, because apparently the port 69 is already used.
I tried all possible commands to see if my port 69 was open but I do not see anywhere.
Then I reboot my nas and 192.168.11.150 address is assigned, but I did manage to access any way. Whether ssh or telnet with acp_commander.
I tested my ports using software autoscan network but apparently all ports are closed ... I do not understand too.
After some time the IP address is no longer available.

i use ubuntu x86_64 operating system.