modem looses lan
I used to have the modem loosing connection with the ISP at random, which seems to be a lease problem but now the modem is also becoming inaccessible to the computers connected to it.
The machines wont connect to the Internet and trying to run the "diagnostic test" from 192.168.1.1 (the modem) gives a message stating that access is not possible or permitted (I have forgotten which).
Does this indicate a faulty modem?
Modem is Netcomm NB1300plus4 (4-5 years old) on a dynamic address and the OS is Debian Sarge & Etch and turning the modem off and back on solves the problem.
Thank you for your help.