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wiki/concepts/Hybrid-DNS-Resolution.md
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wiki/concepts/Hybrid-DNS-Resolution.md
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---
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title: "Hybrid DNS Resolution"
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type: concept
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tags:
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- DNS
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- Networking
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- Hybrid Cloud
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---
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## Definition
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混合云 DNS 解析(Hybrid DNS Resolution)指通过配置转发规则,使云端资源能解析本地域名,同时本地资源也能解析云端域名的机制。
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## Architecture Components
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### AWS Side
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- [[Route-53-Private-Hosted-Zone]]
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- [[Route-53-Resolver-Endpoint]](入站/出站)
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- IAM 角色和策略控制
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### On-Premise Side
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- Active Directory 托管 DNS
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- DNS 转发器
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## Key Capabilities
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- **跨区域弹性**:在出站规则中配置多个区域的 AD 域控制器 IP,确保故障转移
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- **就近解析**:优化 Office 365 等全球化服务的访问性能
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- **安全防护**:防 DNS 隧道攻击、数据外泄、缓存污染
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## Workflow
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1. VPC 内的资源发起 DNS 查询
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2. Route 53 Resolver 检查是否有匹配的转发规则
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3. 如果有,通过 Outbound Endpoint 转发到本地 AD 域控制器
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4. 本地 DNS 返回解析结果
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## Connections
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- [[Route-53-Resolver-Endpoint]] ← implements ← [[Hybrid-DNS-Resolution]]
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- [[Active-Directory]] ← provides ← 域控制器 ← [[Hybrid-DNS-Resolution]]
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