Buying a Private NAT Gateway

You can a private NAT gateway to enable servers in your VPC to access or provide services accessible from on-premises data centers and other VPCs.

Manually add routes in a VPC to connect it to a remote private network through a VPC peering connection, Direct Connect, or VPN connection.
SNAT and DNAT rules cannot share a transit IP address.
The total number of DNAT and SNAT rules that can be added on a private NAT gateway varies with the private NAT gateway specifications.
- Small: 20 or less
- Medium: 50 or less
- Large: 200 or less
- Extra-large: 500 or less

When you buy a private NAT gateway, you must specify its VPC, subnet, and specifications.

Log in to the management console.
Click in the upper left corner and select the desired region and project.
Click Service List in the upper left corner. Under Networking, select NAT Gateway.
The NAT gateway console is displayed.
In the navigation pane on the left, choose NAT Gateway > Private NAT Gateways.
On the Private NAT Gateways page, click Buy Private NAT Gateway.

Configure required parameters. For details, see Table 1.

**Table 1** Descriptions of private NAT gateway parameters
Parameter	Description
Billing Mode	Private NAT gateways are billed on a pay-per-use basis.
Region	The region where the private NAT gateway is located
Name	The name of the private NAT gateway Enter up to 64 characters. Only digits, letters, underscores (_), and hyphens (-) are allowed.
VPC	The VPC that the private NAT gateway belongs to The selected VPC cannot be changed after the private NAT gateway is purchased.
Subnet	The subnet that the private NAT gateway belongs to The subnet must have at least one available IP address. The selected subnet cannot be changed after the private NAT gateway is purchased.
Specifications	The specifications of the private NAT gateway The value can be Extra-large, Large, Medium, or Small. For details about specifications, see NAT Gateway Specifications.
Tag	The private NAT gateway tag, which consists of a key and value pair. You can add up to 10 tags to each private NAT gateway. If you have configured tag policies for private NAT gateways, add tags to your private NAT gateways based on the tag policies. If you add a tag that does not comply with the tag policies, private NAT gateways may fail to be created. Contact your administrator to learn more about tag policies. The tag key and value must meet the requirements listed in Table 2.
Description	Supplementary information about the private NAT gateway Enter up to 255 characters. Angle brackets (<>) are not allowed.

**Table 2** Tag requirements
Parameter	Requirement
Key	Cannot be left blank. Must be unique for each NAT gateway. Can contain a maximum of 36 characters. Cannot contain equal signs (=), asterisks (*), left angle brackets (<), right angle brackets (>), backslashes (\), commas (,), vertical bars (\|), and slashes (/), and the first and last characters cannot be spaces.
Value	Can contain a maximum of 43 characters. Cannot contain equal signs (=), asterisks (*), left angle brackets (<), right angle brackets (>), backslashes (\), commas (,), vertical bars (\|), and slashes (/), and the first and last characters cannot be spaces.