The xprobe2 application was built specifically for OS Fingerprinting or being able to accurately guess a servers Operating System. The unfortunate part about xprobe2 is that is extremely outdated and doesn’t even include Windows 7 in its list of OS’s that it can identify. Even though nmap is pretty much the staple for people to use it is still worth discussing xprobe2 because the items it can guess it does a great job at doing so. It may also be possible that you are assessing a network with some really old servers and updated apps don’t include those operating systems anymore so you may get lucky and find the old operating system using xprobe2.
The question is often raised of how to provide a redundant network solution when connecting your leased cabinet or cage to your colocation’s network. This goal can be achieved in numerous ways but most solutions are fairly expensive. Below I list an entry level option to provide network redundancy when connecting to your colo. One of my preferred vendors is Fortinet because of cost and functionality. Most Foritnet devices will handle BGP, IPS, and provide seamless redundancy between devices. The solution below can be upgraded by purchasing more powerful devices as well as introducing a couple more devices into the solution.