Explanation
An IDRAC (Integrated Dell Remote Access Controller) is a tool that can be used to command a remote shutdown of a physical Linux server. An IDRAC is a hardware device that provides out-of-band management for Dell servers. It allows the technician to access the server's console, power cycle, reboot, or shut down the server remotely using a web interface or a command-line interface. An IDRAC does not depend on the operating system or network connectivity of the server. A virtual serial console is a tool that can be used to access a remote virtual machine's console using a serial port connection. A KVM (Keyboard, Video, Mouse) switch is a device that allows the technician to switch between different computer sources using the same keyboard, monitor, and mouse. A crash cart is a mobile unit that contains a keyboard, monitor, mouse, and other tools that can be connected to a physical server for troubleshooting purposes. References:
https://www.dell.com/support/kbdoc/en-us/000131486/understanding-the-idrac
https://www.howtogeek.com/799968/what-is-a-kvm-switch/
https://www.techopedia.com/definition/1032/business-impact-analysis-bia

Port 443 is used for HTTPS, which is a secure version of HTTP that encrypts the data between the web server and the client. Port 3389 is used for RDP, which is a protocol that allows remote desktop connections to a server. These ports should be allowed for a secure web server that can be administered via RDP.
References:
CompTIA Server+ Certification Exam Objectives1, page 15
Common Ports Cheat Sheet: The Ultimate Ports & Protocols List2

End-of-life is the phase of lifecycle management that deals with a server that is no longer in operation.
End-of-life means that the server has reached the end of its useful life and is no longer supported by the manufacturer or the service provider. End-of-life may also imply that the server is obsolete, incompatible, or inefficient for the current needs and standards1. End-of-life servers may be decommissioned, recycled, donated, or disposed of according to the organizational policies and environmental regulations

https://www.linuxfordevices.com/tutorials/linux/enable-disable-root-login-in-linux

Faulty memory and incorrectly seated memory are likely causes of the random BSOD conditions on the server.
Memory is one of the most common hardware components that can cause BSOD (Blue Screen of Death) errors on Windows systems. BSOD errors occur when the system encounters a fatal error that prevents it from continuing to operate normally. Memory errors can be caused by faulty or incompatible memory modules that have physical defects or manufacturing flaws. Memory errors can also be caused by incorrectly seated memory modules that are not properly inserted or locked into the memory slots on the motherboard. This can result in loose or poor connections between the memory modules and the motherboard.