Last Updated on August 13, 2025 by Arnav Sharma
Azure Firewall is a cloud-based network security service that offers stateful inspection of both ingress and egress traffic to protect Azure Virtual Network resources. This fully managed service by Microsoft Azure simplifies the process of securing network traffic in a highly scalable and available architecture, making it an essential component for any robust network security strategy.
Overview of Azure Firewall Basic
The new SKU, Azure Firewall Basic, is designed to cater to the needs of small and medium businesses (SMBs) that require a reliable firewall solution at a cost-effective price point. This SKU provides the essential features needed to secure their Azure network environments without the complexities and costs associated with more advanced features found in higher-tier SKUs like Azure Firewall Standard and Premium.
Azure Firewall Basic includes the following features:
- Built-in high availability
- Availability Zones
- Application FQDN filtering rules
- Network traffic filtering rules
- FQDN tags
- Service tags
- Threat intelligence in alert mode
- Outbound SNAT support
- Inbound DNAT support
- Multiple public IP addresses
- Azure Monitor logging
- Certifications
Key Features of Azure Firewall Basic
Stateful Firewall Capabilities
Azure Firewall Basic operates as a fully stateful firewall service, meaning it can monitor the full state of active network connections such as TCP streams, UDP communication, and ICMP requests. This ensures that all packets belonging to a given connection are allowed to pass through the firewall, providing robust protection against various network threats.
Built-in High Availability
High availability is ingrained in Azure Firewall Basic, with automatic scaling and redundancy to ensure continuous network protection and uptime without any additional configuration. This feature is crucial for businesses that rely on constant internet connectivity and cannot afford downtime.
Threat Intelligence-Based Filtering
Incorporating threat intelligence from Microsoft’s vast landscape, Azure Firewall Basic is equipped to identify and block known malicious IP addresses and domains automatically. This is a vital feature for preventing attacks before they reach network resources, significantly enhancing overall security posture.
Integration with Azure Services
Azure Firewall Basic seamlessly integrates with other Azure services, such as Azure Monitor and Azure Firewall Manager, to provide a comprehensive view of firewall logs and network traffic patterns. This integration helps in the easy deployment, management, and monitoring of firewall configurations across multiple Azure subscriptions and resources.
Choosing the Right Azure Firewall SKU
When deciding between Azure Firewall Basic, Standard, and Premium, it is essential to consider the specific needs of your network:
- Azure Firewall Basic: Ideal for SMBs that need basic network protection. This SKU includes all fundamental firewall functionalities at a lower cost.
- Azure Firewall Standard: Recommended for enterprises that require more advanced features, such as network traffic filtering across multiple subscription and hybrid environments.
- Azure Firewall Premium: Suitable for organizations that need top-tier security features, including TLS inspection, IDPS (Intrusion Detection and Prevention System), and URL filtering.
Pricing and SLA Details
Azure Firewall Basic offers a straightforward pricing model that includes both deployment and operational costs, making it an affordable option for smaller businesses. The pricing details are transparent, and Microsoft provides an SLA that guarantees built-in high availability and regular security updates, ensuring peace of mind for businesses operating in the Azure cloud.
Deployment and Availability
Azure Firewall Basic is available across multiple availability zones, providing redundancy and fail-safe operations to maintain service continuity during zone outages. The deployment process is simplified through the Azure Portal, where users can configure and manage their firewall settings centrally.