QNAP firmware: activating remote login
You can activate remote login (telnet and SSH) in the QNAP firmware by following these steps. First, click on Administration and enter the password (by default the user is
admin and the password is also
admin). Then look for Remote login. This can be found under System Tools on older versions of the QNAP firmware and under Network Services on newer versions.
Finally, enable telnet, leave the port they use (13131) and press apply.
Go back to the installing Debian on QNAP TS-409 page.