> Most SOHO routers are built using either a Linux kernel where it is part of the netfilter (firewall) module or VxWorks where it is part of the Firewall subsys

> Most SOHO routers are built using either a Linux kernel where it is part of the netfilter (firewall) module or VxWorks where it is part of the Firewall subsystem. Which is just completely irrelevant to the question of whether the device has a firewall, see my inactive air bag analogy in my reply elsewhere in this thread. > It's like saying the chart builder in Excel isn't part of Excel because it's not the spreadsheet editor. Except that you are arguing for the idea that a chart builder necessarily implies a spreadsheet program and that therefore you need a chart builder, because otherwise you can't have a spreadsheet problem.