Azure Front Door is Microsoft’s application delivery network that offers global load balancing, SSL offloading, WAF, and fast failover. It uses Microsoft's global edge network to optimize delivery and secure web applications.

Azure Front Door is not available in Azure China (21Vianet), as China region lacks support. Customers must use Azure global deployments via cross‑region architecture, leading to increased latency due to cross‑border traffic. For China-targeted delivery with WAF and load balancing, Azure China provides Application Gateway & CDN, though features don't fully mirror Front Door.

The information regarding service availability in China is provided for general reference purposes only. Due to the dynamic nature of network conditions and regulatory environments, the actual accessibility of these services may vary over time and by location. Users are advised to verify the current status independently.