Request Parameters Response Elements Errors See Also

ModifyTransitGatewayAttachmentNatConfiguration

Modifies the NAT configuration for the specified transit gateway attachment. Use this operation to do the following:

Enable or disable NAT gateway support for the attachment.
Specify whether the transit gateway installs routes for the NAT CIDRs.
Replace the NAT gateway rules for the attachment.

Only the owner of the transit gateway can modify the NAT configuration.

With NAT gateway support enabled, the transit gateway translates addresses in each rule's MatchSourceCidr range to the corresponding addresses in its NatCidr range.

The transit gateway applies changes asynchronously. To check the result, use GetTransitGatewayAttachmentNatConfiguration.

Request Parameters

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.

DryRun

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation. Otherwise, it is UnauthorizedOperation.

Type: Boolean

Required: No

NatGatewayRule.N

The NAT gateway rules for the attachment. The rules that you specify replace all existing NAT gateway rules for the attachment. You can specify up to 50 rules for an attachment. If you omit this parameter, the existing rules don't change. To remove all rules, use ResetNatGatewayRules.

Type: Array of TransitGatewayNatRuleRequest objects

Array Members: Minimum number of 0 items. Maximum number of 50 items.

Required: No

NatGatewaySupport

Specifies whether to enable or disable NAT gateway support for the attachment. To enable NAT gateway support, the attachment must have at least one NAT gateway rule. You can't modify the NAT configuration while NAT gateway support is enabling or disabling. If you omit this parameter, the current value doesn't change.

Type: String

Valid Values: enable | disable

Required: No

NatSystemRouteSupport

Specifies whether the transit gateway installs routes for the NAT CIDRs in the route tables to which the attachment propagates. For VPC attachments, the transit gateway always installs these routes. You can enable or disable this option only for AWS Direct Connect gateway attachments and Site-to-Site VPN attachments that use dynamic routing. For these attachments, the default is enable. If you omit this parameter, the current value doesn't change.

Type: String

Valid Values: enable | disable

Required: No

ResetNatGatewayRules

Specifies whether to remove all NAT gateway rules from the attachment. If you omit this parameter, the transit gateway doesn't remove any rules. You can't specify this parameter together with NatGatewayRules. Because you can't enable NAT gateway support without rules, also set NatGatewaySupport to disable in the same request if NAT gateway support is currently enabled.

Type: Boolean

Required: No

TransitGatewayAttachmentId

The ID of the transit gateway attachment.

Type: String

Required: Yes

Response Elements

The following elements are returned by the service.

natGatewayRuleSet

The NAT gateway rules for the attachment.

Type: Array of TransitGatewayNatRule objects

Array Members: Minimum number of 0 items. Maximum number of 50 items.

natGatewaySupport

The state of NAT gateway support for the attachment.

Type: String

Valid Values: enabled | disabled | enabling | disabling

natSystemRouteSupport

Specifies whether the transit gateway installs routes for the NAT CIDRs in the route tables to which the attachment propagates.

Type: String

Valid Values: enable | disable

requestId

The ID of the request.

Type: String

transitGatewayAttachmentId

The ID of the transit gateway attachment.

Type: String

Errors

For information about the errors that are common to all actions, see Common Error Types.