Many file server deployments stop after creating a folder, sharing it and mapping a drive. That is not enough. A compatibility-focused configuration can expose the directory structure, allow credentials to be intercepted and give ransomware broad access to shared data.
This guide covers five practical controls that strengthen a Windows Server 2022 file server without making everyday administration unnecessarily complex.
1. Remove legacy access paths
Verify that SMBv1 is not installed, rather than merely disabled:
Get-WindowsFeature FS-SMB1Disable the Guest account and anonymous access to shared resources. Legacy protocols and unauthenticated browsing create unnecessary attack paths.
2. Require SMB signing and use encryption
SMB signing protects traffic against tampering and man-in-the-middle attacks by digitally signing SMB messages. Enforce it through Group Policy where your compatibility assessment allows it.
SMB encryption protects data in transit. Windows Server 2022 supports strong encryption, including AES-256-GCM, and lets you require encryption for selected shares when sensitive data needs additional protection.
3. Enable Access-Based Enumeration
Access-Based Enumeration (ABE) hides folders that a user is not permitted to open. An HR employee does not need to see the Finance share, and an attacker using a compromised account should not receive a complete map of the file server. ABE improves clarity for users and makes reconnaissance more difficult.
4. Use FSRM as an additional control
Install File Server Resource Manager and use file screens to monitor or block selected file types. Extensions associated with ransomware change over time, so extension lists should support a broader incident-response plan rather than act as the only defence.
You can also monitor a controlled decoy folder and trigger an alert or response when it is modified unexpectedly. Test every automated response carefully before using it in production.
5. Configure targeted auditing
Enable Audit File System in Group Policy and configure auditing on the folders that contain critical data. Logging every operation on every share creates excessive noise; targeted auditing provides useful evidence when a file is opened, changed or deleted.
Summary
A secure file server does more than provide access. It limits what users and compromised accounts can discover, protects traffic, detects suspicious activity and produces evidence for incident analysis. These controls should be combined with least privilege, tested backups, patch management and monitoring.