I want to get a Dual Wan and it looks like they come with a firewall. I already have a Linksys Broadband Firewall Router that I am happy with. Can I plug the Linksys into the Dual Wan or should I just use the Dual Wan? Is two firewalls better... or not needed... or conflicting? Any help appreciated.
One firewall is sufficient. You don't need to have a particular brand, as a firewall simply closes ports to traffic.