First off, I know nothing about firewalls so I need some advice. I am currently looking at investing into a external firewall/router. I've heard good things about Linksys, but don't know what exactly I would to get. My guess is I need one on this website. Which one do I need exactly? I have 4 computers needing access to cable internet. They also have to be able to use the same printer. I would also like it if the router/firewall didn't display my actual ip. If I forgot anything else please let me know. Been looking into a firewall/router since Father's Day is coming up.