I realized this guy was a dumbass when I read number 1. I am a Redhat Certified Engineer, and I have several close friends and co-workers that are Linux Administrators for DoD, ORNL, and Y-12 (All in Tennessee). Here is a reason why every single freaking one of these institutions rely on LINUX (mostly RHEL) for the utmost security. The OP has obviously no idea what SELinux is or just how actually secure it is. Its a shame there are so many self declared "security experts" involved with Bitcoin. I am no expert, but I do know my ass from a hole in the ground.
You know? You're funny.
You call yourself engineer because you bought a piece of paper, still you dont know that SElinux is not only for linux. But obviously you saw linux in the name, and tried to make a conclusion.
You call yourself an engineer, still you don't know that there are much better ways to secure a webserver, which aren't going to stop some of your services.