Explanation
These are two methods that can prevent a user from installing an OS on a server if properly configured. A bootloader password is a password that protects the bootloader from unauthorized access or modification. The bootloader is a program that loads the operating system into memory when the system boots up. If a user does not know the bootloader password, they cannot change the boot order or boot from another device such as a CD-ROM or USB drive that contains an OS installation media. A BIOS/UEFI password is a password that protects the BIOS (Basic Input Output System) or UEFI (Unified Extensible Firmware Interface) from unauthorized access or modification. The BIOS or UEFI is a firmware that initializes and configures the hardware components of the system before loading

The component that allows for a connection of devices to both sides inside of a blade enclosure is midplane. A midplane is a board or panel that connects two sets of connectors or devices in parallel with each other. A midplane is typically used in blade enclosures or chassis to provide power and data connections between blade servers on one side and power supplies, cooling fans, switches, or management modules on the other side. A midplane can also act as a backplane by providing bus signals or communication channels between devices.

These are some steps for resolving issues with DNS. A gateway is not required for LAN access so this cannot be the answer.
Solution 1: Check your Computer is correct or not for IP Address
Solution 2: Flush and Reset a client resolver cache and Renew DNS client registration Solution 3: Edit DNS Lookup Host file entry
https://morgantechspace.com/2014/03/can-ping-by-ip-address-but-not-by-machine-name.html#

This is the most likely cause of the issue because firewall rules can block or allow traffic based on source, destination, port, protocol, or other criteria. If the firewall rules are not configured properly, they can prevent remote users from accessing the cloud application server, while allowing on-site users to access it. Reference: https://docs.microsoft.com/en-us/azure/virtual-network/security-overview

The difference between a hot site and a warm site is that while the hot site provides a mirror of the production data-center and its environment(s), a warm site will contain only servers ready for the installation of production environments.
https://www.seguetech.com/three-stages-disaster-recovery-sites/#