This is pet peeve of mine: Business networks should be behind firewalls, not behind home routers! When we visit a client location, we generally find one of the following configurations. Absolutely NO firewall – just the router provided by the ISP A Linksys, TrendNet, Netgear, D-Link wireless router designed for home use An actual firewall such as a Cisco, WatchGuard, SonicWALL, …