the best firewall is a proxy firewallor at least firewall card
they are all software and therfor all vulnerable to some exploits if they are found, what matters is howgood the programmers are at code reviews and howgood the companies are at software updates
they are all software and therfor all vulnerable to some exploits if they are found, what matters is howgood the programmers are at code reviews and howgood the companies are at software updates