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---
title: "Hybrid DNS Resolution"
type: concept
tags:
- DNS
- Networking
- Hybrid Cloud
---
## Definition
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。
## Architecture Components
### AWS Side
- [[Route-53-Private-Hosted-Zone]]
- [[Route-53-Resolver-Endpoint]](入站/出站)
- IAM 角色和策略控制
### On-Premise Side
- Active Directory 托管 DNS
- DNS 转发器
## Key Capabilities
- **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
- **就近解析**:优化 Office 365 等全球化服务的访问性能
- **安全防护**:防 DNS 隧道攻击、数据外泄、缓存污染
## Workflow
1. VPC 内的资源发起 DNS 查询
2. Route 53 Resolver 检查是否有匹配的转发规则
3. 如果有,通过 Outbound Endpoint 转发到本地 AD 域控制器
4. 本地 DNS 返回解析结果
## Connections
- [[Route-53-Resolver-Endpoint]] ← implements ← [[Hybrid-DNS-Resolution]]
- [[Active-Directory]] ← provides ← 域控制器 ← [[Hybrid-DNS-Resolution]]