Windows Server 2012 R2 Core requires some configuration changes to the firewall and registry to enable remote administration. I’ve struggled to find a comprehensive list, so I’ll keep one here of the commands I use regularly.

General

Enable-NetFirewallRule -DisplayGroup "Remote Desktop"
Enable-NetFirewallRule -DisplayGroup "Windows Management Instrumentation (WMI)"
Enable-NetFirewallRule -DisplayGroup "Remote Event Log Management"
Enable-NetFirewallRule -DisplayGroup "Remote Service Management"
Enable-NetFirewallRule -DisplayGroup "File and Printer Sharing"
Enable-NetFirewallRule -DisplayGroup "Remote Scheduled Tasks Management"
Enable-NetFirewallRule -DisplayGroup "Performance Logs and Alerts"
Enable-NetFirewallRule -DisplayGroup "Windows Remote Management"
Enable-NetFirewallRule -DisplayGroup "Windows Firewall Remote Management"
Enable-NetFirewallRule -DisplayGroup "Routing and Remote Access"

IIS

Install-WindowsFeature Web-Mgmt-Service
Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\WebManagement\Server" -Name "EnableRemoteManagement" -Value "1"
New-NetFirewallRule -Action Allow -Direction Inbound -DisplayName "IIS Management" -Service "WMSVC"
Set-Service "WMSVC" -StartupType Automatic
Start-Service "WMSVC"