Azure VNG动态IP配置FQDN维持连接及Azure Marketplace第三方方案咨询

Great question! Let's tackle this from two angles: using FQDN to handle VNG IP changes, and third-party solutions from Azure Marketplace that address this need.

First, to confirm: Azure Virtual Network Gateway (VNG) does not support static public IP addresses natively, as you noted. However, you can absolutely use an FQDN to mitigate connectivity issues when the VNG's dynamic IP changes:

• You can configure a custom FQDN for the public IP address associated with your VNG (via Azure Portal, Azure CLI, or PowerShell). Azure automatically manages the DNS A record tied to this FQDN.
• When your VNG restarts and its public IP updates, Azure will automatically refresh the DNS record to point to the new IP address. As long as your connecting endpoints (like on-premises VPN devices or cloud services) use this FQDN instead of hardcoding the IP, they'll resolve to the new address once DNS propagates.
• A quick note on DNS caching: Some devices or systems cache DNS records for longer periods. To minimize downtime, you can adjust the TTL (Time to Live) for the FQDN's DNS record to a shorter value (like 300 seconds) and ensure your connecting devices support automatic DNS re-resolution.

If you need a more permanent fix (like native static IP support for your gateway), here are top third-party solutions available in Azure Marketplace:

• Cisco Cloud Services Router (CSR 1000V)：A widely adopted VPN gateway alternative that supports static public IP addresses. It offers full IPsec and SSL VPN capabilities, along with advanced routing features, making it a drop-in replacement for Azure's native VNG for many use cases.
• Palo Alto Networks VM-Series Firewall：Beyond robust firewalling, this solution can act as a VPN gateway with static IP support. It includes advanced traffic inspection, threat prevention, and centralized management, ideal for security-focused environments.
• Fortinet FortiGate：This enterprise-grade network security device supports VPN gateway deployment with static IPs. It adds features like VPN load balancing, automatic failover, and integrated security policies to boost connection reliability.
• Check Point CloudGuard Network Security：Offers VPN gateway functionality with static IP support, plus advanced threat detection and prevention tools. It's designed for enterprise-scale networks needing both secure connectivity and robust security posture.

内容的提问来源于stack exchange，提问作者HABEEB