SQL Server on Azure Security

Encryption Options

Encryption is fundamental to securing data stored in SQL Server on Azure.

Azure provides multiple encryption methods to protect data both at rest and in transit.

• Transparent Data Encryption (TDE) encrypts database files automatically without application changes.
• Always Encrypted ensures sensitive data is encrypted on the client side and never revealed in plaintext to the database engine.
• Encryption in transit uses TLS to secure data moving between clients and SQL Server.

Access Control and Authentication

Controlling who can access your SQL Server resources is vital for security.

Azure Active Directory integration simplifies authentication and enables role-based access control.

• Use Azure AD authentication to manage user identities centrally.
• Assign database roles and permissions to enforce least privilege access.
• Enable Multi-Factor Authentication (MFA) for enhanced security.
• Use Managed Identities for Azure resources to securely connect without credentials.

Network Security

Network security features help restrict access to your SQL Server instances and protect against unauthorized connections.

• Configure Virtual Network (VNet) service endpoints to limit access to specific Azure VNets.
• Use firewall rules to allow only trusted IP addresses.
• Enable Private Link to access SQL Server privately over the Azure backbone network.
• Monitor network traffic using Azure Network Security Groups (NSGs) and Azure Firewall.

Compliance and Auditing

Azure SQL Server supports compliance with industry standards and provides auditing capabilities to track database activity.

• Azure SQL complies with standards like GDPR, HIPAA, ISO, and SOC.
• Enable SQL Auditing to log database events for security analysis.
• Use Advanced Threat Protection to detect anomalous activities.
• Regularly review audit logs and alerts to maintain security posture.