> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/welcome/cn/elastic-compute/networking/01-overview-3/07-configuration-guide.md).

# NAT 网关配置指南

## 配置流程

![配置流程 — 从零开始搭建可用的 NAT 网关](/files/GRQRlGmyRYiUNMnYVzyy)

步骤 **1–3** 为必要步骤。**4a** 和 **4b** 相互独立 — 可以只配置其中一个或两个都配置。**5** 为验证步骤。

| #  | 任务             | Console 路径                                                                                 | 您将设置的内容                                                            |
| -- | -------------- | ------------------------------------------------------------------------------------------ | ------------------------------------------------------------------ |
| 1  | 分配弹性 IP        | [弹性计算 → 弹性 IPv4 → 分配 EIP](https://console.zenlayer.com/zec/elastic-ip)                     | 与网关同地区                                                             |
| 2  | 创建公网 NAT 网关    | [公网 NAT 网关 → 创建公网 NAT 网关](https://console.zenlayer.com/zec/nat-gateway/create)             | 全球 VPC · 需通过网关路由的子网                                                |
| 3  | 向网关绑定 EIPv4    | 打开 [公网 NAT 网关](https://console.zenlayer.com/zec/nat-gateway) → 网关 → **信息** → **绑定弹性 IPv4** | 选择已分配的 EIP 之一                                                      |
| 4a | 添加 SNAT 条目（出站） | 同一网关 → **NAT 规则** → **创建 SNAT 条目**                                                         | 源子网 / CIDR · 出站 EIPv4                                              |
| 4b | 添加 DNAT 条目（入站） | 同一网关 → **NAT 规则** → **创建 DNAT 条目**                                                         | EIPv4 + 公网端口 → 私有 IP + 私有端口 · 协议（`tcp` / `udp`；`any` 仅在不填写端口字段时使用） |
| 5  | 验证 VPC 路由（可选）  | [VPC → 路由表](https://console.zenlayer.com/zec/route-table)，按类型 **NAT 网关**过滤                 | 每个覆盖子网都有指向网关的默认路由                                                  |

网关必须达到`运行中`状态后才能执行步骤 3。每条新的 SNAT/DNAT 条目在网关应用规则后即时生效。

## 日常运维

| 任务                | Console 路径                                                                                                         |
| ----------------- | ------------------------------------------------------------------------------------------------------------------ |
| 变更子网关联            | 网关详情面板 → 编辑子网选择                                                                                                    |
| 删除 SNAT 或 DNAT 条目 | 网关 → **NAT 规则** → 在目标条目上点击**删除**                                                                                   |
| 删除网关              | [公网 NAT 网关](https://console.zenlayer.com/zec/nat-gateway) → **⋯**（操作） → **删除**。请先删除未使用的条目；剩余 EIP 将自动解绑，网关路由也将自动撤销。 |
| 查看账单和订单           | 网关 → **信息** → **订单和计费** → **查看相关订单** / **查看账单详情**                                                                  |


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