On-line system vulnerability checker sites
I've done some googling for websites that offer to probe your machine for vulnerabilities to attack from hackers. Most of them only handle Windows installations, however. Of those that handle Linux, I can't say I've heard of any of them and am consequently wary of the possibility that they might plant spyware on my system. So the question is, can anyone recommend a trustworthy site where I can get my firewall's efficacy probed benignly?