Manage NAT Rules

NAT rules map access to a public IP address to an instance’s private IP address. When creating a NAT rule, select the public IP address, VPC, and private IP address of the target instance. This is equivalent to binding the NAT Gateway to that instance. You can create Port Mapping rules or map the entire public IP address to an instance’s private IP address.

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Create NAT Rules

1. Log in to the GPU Cloud console and go to CLOUD NETWORKS > NAT Gateway.
2. In the upper-right corner, select the target region.
3. Click Create NAT Rule.
4. Configure basic information.

   Parameter	Description
   Public IP	Select the public IP used to receive public access. If no public IP is available, create an EIP first.
   VPC	Select the VPC to which the NAT rule belongs. If no VPC is available, Create VPC first.
   Private IP	Select the private IP address of the target instance. If no instance is available, create an instance first. After the NAT rule is created, access to the public IP is forwarded to the instance based on the mapping.

5. Select the mapping method.

   Mapping Method	Description	Configuration Required
   Port Mapping	Maps a specific port on the public IP to the corresponding port on the instance’s private IP for targeted access.	Public Port, Private Port, Protocol
   Full Port Mapping	Maps the entire public IP to an instance’s private IP, forwarding all traffic without changing ports.	No port configuration required

6. Click OK. After creation, the NAT rule is displayed in the list.

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Update NAT Rules

You can update the private IP address of the instance bound to the NAT rule and the specific port number used for Port Mapping, but you cannot modify the mapping method of the NAT rule.

1. In the NAT rule list, find the target rule and click Edit.
2. Modify the private IP address of the associated instance as needed. If you are currently using Port Mapping, you can also modify the private port.
3. Click Confirm. After the update is complete, confirm that the NAT rule displays the new instance private IP address or port configuration. The mapping mode of a NAT rule cannot be changed after creation. To switch between Port Mapping and Full Port Mapping, delete the original NAT rule and create a new one.

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Delete NAT Rule

If a NAT rule is no longer needed, you can delete it.

1. In the NAT rule list, locate the target rule and click Delete.
2. Follow the on-screen prompts to confirm deletion.