Solution is acting as a gateway for remote administration tasks. Available on HTTPS only. Allow RDP, VNC and SSH from it to our applicative end servers. Access is restrained to Admin with 2FA.
Pros
All port closed except 443
Attackable scope is limited
Administration tasks are under one entry point
Need
Privileged users accesses should only be made through a secure portal no matter is the end-devices.
Merge similar scripts or scripts acting on similar actions. Comments lines and function to understand code block. Create easily readable logs. Push failure warning to IT group. Use modern auth and token.
All desks linked to network. Reliable Wifi installation. New Visio system. New Access card system. No services downtime. On-site servers physically moved. Recycling old hardware.