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wiki/concepts/Route-53-Resolver.md
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title: "Route 53 Resolver"
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type: concept
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tags:
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- AWS
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- DNS
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- Networking
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last_updated: 2026-04-28
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---
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## Definition
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AWS Route 53 Resolver 是 Amazon Route 53 提供的 DNS 解析服务核心组件,负责在 VPC 与其他网络环境之间转发 DNS 查询。它提供两个关键端点类型:Inbound Endpoints(允许本地数据中心向 AWS VPC 发起 DNS 查询)和 Outbound Endpoints(允许 VPC 向本地 DNS 服务器转发查询),从而实现混合云环境的双向 DNS 解析。
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## Aliases
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- Route 53 Resolver
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- AWS Resolver
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## Key Characteristics
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- **混合云 DNS 网关**:解决 VPC 内 AWS 资源与本地数据中心(On-prem)之间的域名解析互通问题
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- **Inbound Endpoint**:监听 ENI 上的 UDP/TCP 53 端口,接收来自本地网络的递归 DNS 查询
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- **Outbound Endpoint**:通过转发规则(Resolver Rules)将匹配特定域名的查询主动发送至指定 IP(如 On-prem DNS 服务器)
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- **跨账号共享**:Resolver Rules 可通过 AWS RAM 共享给其他 AWS 账户,无需在各账户单独创建规则
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- **与 Private Hosted Zone 协同**:Resolver 自动优先查询 PHZ 中的记录,未命中时再使用转发规则
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## Related Concepts
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- [[Private-Hosted-Zone]] — 在 VPC 内部解析私有域名
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- [[Resolver-Rules]] — 定义域名转发逻辑
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- [[VPC-Association-Authorization]] — 跨账号 VPC 与 PHZ 关联的授权机制
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- [[AWS-Landing-Zone]] — 多账号环境下的 DNS 集中化管理背景
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## Sources
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- [[ctp-topic-19-configuring-dns-within-aws-lzs]]
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