They do mean you're locked into a particular vendor and might have to deal with that device not getting updates in the future. However, you can eventually make your own hardware firewall ...

L ike many internet users, I was content to protect my home network behind whatever passed for a firewall on my router, and ...

They can also be blocked by walls. However, they are ideal for mobile devices, which can connect to a network as long as they are in the range of a wireless access point (WAP). Network server ...