I'm in the process of securing my home network. I have come across a great solution: firewall livecd. This solution is advantageous for several reasons. However, I am concerned about whether or not they can be trusted.

There is m0n0wall, Sentry Firewall, redWall Firewall, among others. Can the binaries provided by this software be trusted?

My concerns are there have been backdoors planted somehow. I mean, I don't have the time or knowledge to analyze the source code for vulnerabilities. Moreover, by going with a solution like this it is up to the maintainers to update any vulnerabities found in the packages included.

Is it better to just roll your own OS, and sign up to the mailing list where they list the currently known bugs?

Thanks for any insight!