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公网NAT网关分为SNAT和DNAT两个功能。 SNAT功能通过绑定弹性公网IP，实现私有IP向公有IP的转换，可实现VPC内跨可用区的多个云主机共享弹性公网IP，安全，高效的访问互联网。 SNAT架构如图1所示。 图1 SNAT架构图 DNAT功能绑定弹性公网IP，可通过IP映射或端口映射两种方式，实
NAT网关只针对此地址起作用。 弹性公网IP 用来提供互联网访问的公网IP。 这里只能选择没有被绑定的弹性公网IP，或者被绑定在当前公网NAT网关中非“所有端口”类型DNAT规则上的弹性公网IP，或者被绑定到当前公网NAT网关中SNAT规则上的弹性公网IP。 监控 为SNAT连接数设置告警。
务器通过SNAT方式访问公网。 弹性公网IP 用来提供互联网访问的公网IP。 这里只能选择没有被绑定的弹性公网IP，或者被绑定在当前公网NAT网关中非“所有端口”类型DNAT规则上的弹性公网IP，或者被绑定到当前公网NAT网关中SNAT规则上的弹性公网IP。 监控 为SNAT连接数设置告警。
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
协议和端口访问该弹性公网IP的请求转发到目标云主机实例的指定端口上。 支持协议 协议类型分为TCP和UDP两种类型。端口类型为具体端口时，可配置此参数，端口类型为所有端口时，此参数默认设置为All。 弹性公网IP 弹性公网IP地址。 这里只能选择没有被绑定的弹性公网IP，或者被绑
用来提供互联网访问的公网IP的类型。 使用弹性公网IP时，支持选择未绑定的弹性公网IP或者被绑定在当前VPC中DNAT规则上的弹性公网IP。 使用全域弹性公网IP时，支持选择未被使用的全域弹性公网IP或者已经被当前NAT网关的DNAT规则所使用的全域弹性公网IP。 公网端口 弹性公网IP的端口。当端口
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security
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