NAT Gateway

NAT Gateway is a network cloud service that supports IP address translation, providing high-performance Internet access for resources within Tencent Cloud. Through the NAT Gateway, resources on Tencent Cloud can access the Internet more securely, protecting private network information from direct exposure to the public network. You can also use the NAT Gateway to achieve massive public network access, supporting up to over 10 million concurrent connections. Additionally, the NAT Gateway supports IP-level traffic management, enabling you to instantly view traffic data, quickly identify abnormal traffic, and troubleshoot network issues. As a mature core product for public network egress, Address Translation enables secure communication between resources within a private network and the public network through dual modes, SNAT and DNAT. Elastic Public IP (EIP) supports binding multiple addresses; a single gateway can associate up to 10 Elastic Public IPs (EIPs) to meet high-concurrency access demands. Security Protection integrates BGP anti-DDoS capabilities to defend against DDoS and CC attacks, while using address translation to conceal internal IPs and avoid direct exposure risks. Gateway Traffic Control provides multi-dimensional monitoring and customizable threshold alerts, helping to quickly locate abnormal traffic. Security and Anti-DDoS Protection employs a hot-standby design to enhance service availability to 99.99%, ensuring continuous business operation. Whether for public network access with massive requests, business deployments with high-security requirements, or handling peak traffic for large-scale applications, the NAT Gateway can become the core support for enterprise cloud network architectures through the efficiency of Address Translation, the flexibility of Elastic Public IP (EIP), the reliability of Security Protection, the controllability of Gateway Traffic Control, and the stability of Security and Anti-DDoS Protection. Furthermore, the deep synergy between Security Protection and Security and Anti-DDoS Protection significantly enhances the service resilience and security level of the NAT Gateway.

Frequently Asked Questions

Q: As the core function, how does Address Translation synergize with Elastic Public IP (EIP) and Security Protection to support the core needs of the NAT Gateway, Gateway Traffic Control, and Security and Anti-DDoS Protection? Where are its technical advantages reflected?

 

A: Centered on "Bidirectional Translation + Security Isolation," Address Translation provides foundational support for two core capabilities, solidifying the service base of the NAT Gateway. Firstly, through SNAT mode, it translates private IPs into Elastic Public IPs (EIPs), enabling multiple cloud hosts to share a public network access channel. Combined with the flexible binding feature of Elastic Public IP (EIP), it allows on-demand scaling of public network egress. Simultaneously, Address Translation hides the real private IPs, and together with the BGP anti-DDoS capabilities of Security Protection, forms a dual security guarantee of "translation isolation + attack protection." Secondly, DNAT mode maps Elastic Public IPs (EIPs) to internal service addresses, allowing external networks to access cloud services. It also coordinates with Gateway Traffic Control to monitor the translated traffic status in real-time. When abnormal peaks occur, alerts are triggered. Coupled with the hot-standby mechanism of Security and Anti-DDoS Protection, it ensures the Address Translation service remains uninterrupted. Technical advantages are evident in two aspects: First, "Efficient Adaptation + Security Backstop" – Address Translation supports tens of millions of concurrent connections, and combined with the multi-address expansion of Elastic Public IP (EIP), it meets the demands of high-traffic scenarios, while Security Protection safeguards the translation process. Second, "Stable & Reliable + Easy O&M" – Security and Anti-DDoS Protection ensures the high availability of the Address Translation service, and Gateway Traffic Control simplifies fault diagnosis, making the overall operation and maintenance of the NAT Gateway more efficient.

Q: What is the core synergistic value between Security Protection and Security and Anti-DDoS Protection? How can Address Translation and Elastic Public IP (EIP) be leveraged to strengthen the competitiveness of the NAT Gateway?

 

A: Their core synergistic value lies in the dual guarantee of "Security Backstop + Fault Self-recovery," addressing the pain points of public network access, such as "high security risks and slow fault recovery." Security Protection focuses on proactively defending against external attacks, preventing business interruptions due to attacks. Security and Anti-DDoS Protection focuses on passive fault recovery, ensuring rapid service self-healing during hardware or network anomalies. Their combination elevates the NAT Gateway from a "single access channel" to a "secure and reliable public network egress point." Their synergy with Address Translation and Elastic Public IP (EIP) significantly enhances the competitiveness of the NAT Gateway: Address Translation provides the isolation foundation for Security Protection, reducing the attack surface by hiding private IPs. Simultaneously, the anti-DDoS capabilities of Security Protection safeguard the public network traffic after address translation. Elastic Public IP (EIP) supports binding with Security Protection's anti-DDoS packages, enabling integrated configuration of "IP - Gateway - Protection." Combined with the flexible mapping of Address Translation, this allows security policies to precisely adapt to different services. Security and Anti-DDoS Protection ensures the stability of the binding relationship between Address Translation and Elastic Public IP (EIP); during failover, no reconfiguration is needed, improving business continuity. This combination of "Security Protection + Fault Self-recovery + Efficient Translation + Flexible Scaling" gives the NAT Gateway stronger market competitiveness.

Q: How does Gateway Traffic Control address the pain points of public network access management for the NAT Gateway? What benefits does its synergy with the NAT Gateway and Address Translation bring to Elastic Public IP (EIP) and Security Protection?

A: The core value of Gateway Traffic Control lies in "Real-time Monitoring + Risk Warning," solving the traditional public network access pain points of "uncontrollable traffic and difficulty in detecting faults." Through multi-dimensional data collection and customizable threshold settings, it monitors metrics such as inbound/outbound traffic after address translation and concurrent connection counts in real-time. When anomalies occur, alerts are sent via email or SMS, helping to preemptively mitigate risks. Its synergy with the two core components brings significant gains to scenario-specific capabilities: Working with the NAT Gateway and Address Translation, Gateway Traffic Control can precisely locate the source and translation path of abnormal traffic. For example, it can identify abnormal traffic associated with a specific Elastic Public IP (EIP) and quickly correlate it to a specific internal service. For Elastic Public IP (EIP), Gateway Traffic Control can monitor usage on a per-IP basis, helping optimize IP resource allocation and prevent overloading a single IP. For Security Protection, the abnormal peak data from Gateway Traffic Control can serve as a basis for attack warnings. Combined with the anti-DDoS capabilities of Security Protection, it enables proactive strategy reinforcement. For instance, when traffic for a particular Elastic Public IP (EIP) suddenly spikes, it can automatically coordinate with Security Protection to elevate the protection level, defending against potential attacks. This synergy makes the resource utilization of Elastic Public IP (EIP) more efficient, the response of Security Protection more precise, and the public network access management of the NAT Gateway more intelligent.