NAT Gateway

Features

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  SNAT

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    Supports source network address translation (SNAT). VPC-connected ECS instances can use the same EIP to access the Internet.

    
    

    Source IP address mapping

    Maps IP addresses of VSwitches to EIPs. ECS instances connected to the same VSwitch in a VPC can use the same EIP to access the Internet. This means that you do not have to manage an EIP for each ECS instance.

    
    

    CIDR rules

    Supports CIDR rules for VSwitches. You can submit a ticket to request more fine-grained CIDR rules.

    
    
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  DNAT

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    Supports destination network address translation (SNAT). VPC-connected ECS instances can use the same EIP to deliver services to the Internet.

    
    

    Port mapping

    Maps internal ports on ECS instances to external ports on a NAT gateway. This enables applications running these internal ports to deliver services to the Internet.

    
    

    Destination IP address mapping

    Maps IP addresses of VPC-connected ECS instances to EIPs. This enables the ECS instances to deliver services to the Internet.