Wireless Joint

How do i prevent firmware update on MR6150/MR6400/MR6550 (non AT&T) models?
I have access to root. Is there a known server address i can block using hosts file?

Thank you.

There are lots of different ways to do this
here is the update address
or in the nv set WU_AUTOCHECK to 0
It wont check for updates unless you tell it to

or

change WU_UPDATEURL to anything else

or
change WU_AUTH to anything else
and it wont be able to pass the login to get the update

keep in mind there is a factory backup, actually there are more than one backup that can restore these items.

AT!OPENLOCK?

and

AT!WUCHECKINT=0
ok