[Trisquel-users] Implications of modems

[tsduv1994]

Since LibreWRT came to my attention, I've considered buying a router  
compatible with it. This got me to thinking, however, that the router is  
connected to the modem and as far as I know there's no way to free a modem.  
Is this not a big concern? It seems to me that from a network security point  
of view, the modem would be a single point of failure (if it had a backdoor).