Of course the idea that open source software in general, and firewalls in specific are better than closed source ones relies on people actually having the skills and time necessary to conduct a decent audit.<p>Some of the very large security bugs found in open source software which were present in that code for years, indicate that this is not commonly done.<p>And that was just bugs as opposed to actual backdoors which would likely be harder to find if inserted competently.<p>So whilst in theory you are correct, I&#x27;m not so sure you are in practice.