Security Tips for Windows Servers

Securing your Windows Server is essential for protecting your data and ensuring system stability. Below are updated security tips tailored for modern Windows Server environments:

Physical access to your server equals total control. Place your servers in locked, access-controlled environments. Also:

• Configure the BIOS/UEFI to boot only from internal drives.

• Disable USB boot and CD/DVD boot options.

• Set a strong BIOS/UEFI password to prevent unauthorized changes.

BitLocker helps protect your data even if the server or its drives are physically stolen. On servers with a Trusted Platform Module (TPM), encryption is transparent and secure:

• Enable BitLocker via the Windows Admin Center or Group Policy.

• Store recovery keys in Active Directory or Azure AD.

File servers typically do not need direct Internet access. Best practices include:

• Use Windows Defender Firewall to block inbound/outbound Internet traffic unless explicitly required.

• Place the server in a segmented network zone (e.g., behind a firewall or within a DMZ if required).

• Disable unused network interfaces.

Apply critical updates to protect against vulnerabilities:

• Use Windows Update or Windows Server Update Services (WSUS) for centralized patch management.

• Enable Automatic Updates or schedule update installation through Group Policy.

• Regularly check that Internet Explorer Enhanced Security Configuration is enabled, or better, use Windows Admin Center for GUI-free administration.

Install Microsoft Defender Antivirus or a third-party enterprise-grade security solution:

• Ensure regular updates for virus definitions.

• Configure real-time protection and periodic scans.

• Monitor threats using Microsoft Defender for Endpoint (if available in your environment).

Reduce the attack surface by removing unused roles and features:

• Avoid installing components like Flash, Silverlight, or Java unless absolutely required.

• Use Server Core installations when possible, which come with fewer services and a smaller attack surface.

Stop and disable services not required by your server role. Examples include:

• Fax, Telnet, Remote Desktop Services (if unused), Web Publishing, Print Spooler, etc.
  Use PowerShell or Services.msc to manage service states.

Avoid logging in or running applications as Administrator unnecessarily:

• Create role-specific accounts with only the permissions they need.

• Use Just Enough Administration (JEA) and User Account Control (UAC) for tighter control.

• Enforce strong password policies and consider using multi-factor authentication (MFA) for admin accounts.

Use NTFS to set granular access controls:

• Navigate to folder/file properties → Security tab → Advanced → Permissions.

• Apply Read/Write/Modify permissions based on groups and roles.

• Avoid using the "Everyone" group in production environments.

Track access and changes to sensitive data:

• Go to file/folder properties → Security → Advanced → Auditing tab.

• Use Group Policy to enable object access auditing.

• Review audit logs in the Windows Event Viewer (under Security).

Since Windows Server 2008, the Security Configuration Wizard helps create server-specific security policies:

• Access SCW via Server Manager or Administrative Tools.

• Apply security templates tailored to your server's roles (File Server, DNS, Web Server, etc.).

• Use Windows Admin Center for simplified and secure remote management.

• Enable Secure Boot and Credential Guard on supported hardware for enhanced security.

• Use Group Policy or Microsoft Endpoint Manager to enforce consistent settings across your environment.