one of the main selling points on the Router is the built-in Firewall. So, Are we being 'scared or cajoled' into buying a Software Firewall by 'the big boys' when a Hardware Firewall is already online?
The theory is your PC's can be individually protected by firewalls, but your router is their gateway to the internet. If you can hack the router, you can control the network (although you still need to get past the PC firewall) and deny service etc. I'm not aware of any need to buy router firewall software as most thesedays come pre installed. I'd only really worry about PC firewall software.
And it is interesting that they work on different traffic flows, in/out bound, that I never knew. I did suspect that there was some scaremongering tactics from developers, in fact I am sure there is.
I did use Norton until it gave lots of LU**** errors because the upgrade manager, I just got fed up installing fixes and doing the same for the PC's I support. (I am the family IT expert hehe, everyone should have one of those. Incidentally I am also the head chef...)
Since I prefer the free stuff like everyone else I have long ago (in IT terms) switched to AVG and other such free tools but I am still curious as to why I needed both Hard and Soft Firewalls.