February 2020
Intermediate to advanced
666 pages
15h 45m
English
Content preview from Mastering Linux Security and Hardening - Second Edition
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Setting up security banners
Something that you really, really don't want is to have a login banner that says something to the effect of Welcome to our network. I say that because, quite a few years ago, I attended a mentored SANS course on incident handling. Our instructor told us a story about how a company took a suspected network intruder to court, only to get the case thrown out. The reason? The alleged intruder said, "Well, I saw the message that said Welcome to the network, so I thought that I really was welcome there." Yeah, supposedly, that was enough to get the case thrown out.
A few years later, I related that story to the students in one of my Linux admin classes. One student said, "That makes no sense. We all have welcome mats ...