Creating a NAT Gateway

Create a NAT gateway in a virtual cloud network (VCN) in Networking.

Prerequisites:

Decide which private subnets in the VCN need access to the internet, and create those private subnets.
Only one NAT gateway is needed for each VCN. All private subnets within a VCN have access to the NAT gateway if the security rules and route table rules allow that access.
You can configure the types of ingress and egress internet traffic route rules that you want to enable for the resources in each public subnet (examples: ingress HTTPS connections, ingress ICMP ping connections).
The required IAM policy is in place to allow you to work with Networking service resources. For administrators, see IAM Policies for Networking.

1. On the Virtual Cloud Networks list page, select the VCN that you want to create a NAT gateway in. If you need help finding the list page or the VCN, see Listing VCNs.
2. On the details page, perform one of the following actions depending on the option that you see:
  
  On the Gateways tab, go to the NAT Gateways section and select Create NAT Gateway.
  
  Under Resources, select NAT Gateways, and then select Create NAT Gateway.
3. Enter a friendly name for the gateway. It doesn't have to be unique. Avoid entering confidential information.
4. Verify the compartment that you want to create the gateway in. Select another compartment if needed.
5. Specify whether the public IP address is reserved or ephemeral. Oracle generates an IP address for the gateway automatically.
  
  Ephemeral IP Address: Select this option to let Oracle specify an ephemeral IP address for you from the Oracle IP pool. This option is the default.
  
  Reserved IP Address: Select this option to specify an existing reserved IP address by name, or to create a new reserved IP address by assigning a name and selecting a source IP pool for the address. If you don't select a pool, the default Oracle IP pool is used.
6. (Optional) In the Route Table Association section, you can associate a specific route table with this gateway. After you associate a route table, the gateway must always have a route table associated with it. You can change the rules in the current route table or replace it with another route table.
7. (Optional) In the Tags section, add one or more tags. If you have permissions to create a resource, then you also have permissions to apply free-form tags to that resource. To apply a defined tag, you must have permissions to use the tag namespace. For more information about tagging, see Resource Tags. If you're not sure whether to apply tags, skip this option or ask an administrator. You can apply tags later.
8. Select Create NAT Gateway.
The NAT gateway is created and displayed on the NAT Gateways list. The gateway allows traffic by default. At any time, you can block or allow traffic through it.
Use the network nat-gateway create command and required parameters to create a NAT gateway in a VCN:
Command
oci network nat-gateway create --compartment-id compartment-ocid --vcn-id vcn-ocid ... [OPTIONS]
For a complete list of parameters and values for CLI commands, see the CLI Command Reference.
Run the CreateNatGateway operation to create a NAT gateway in a VCN.

Oracle Cloud Infrastructure Documentation

Creating a NAT Gateway