2026/10/22 - Amazon Elastic Compute Cloud - 2 new 5 updated api methods
Changes AWS Transit Gateway now provides managed one-to-one NAT directly on its attachments, through integration with Regional Private NAT Gateway. Use ModifyTransitGatewayAttachmentNatConfiguration to enable NAT and configure NAT rules, and GetTransitGatewayAttachmentNatConfiguration to view them.
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.
See also: AWS API Documentation
Request Syntax
client.modify_transit_gateway_attachment_nat_configuration(
TransitGatewayAttachmentId='string',
NatGatewaySupport='enable'|'disable',
NatSystemRouteSupport='enable'|'disable',
NatGatewayRules=[
{
'RuleNumber': 123,
'MatchSourceCidr': 'string',
'NatCidr': 'string'
},
],
ResetNatGatewayRules=True|False,
DryRun=True|False
)
string
[REQUIRED]
The ID of the transit gateway attachment.
string
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.
string
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 Amazon Web Services 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.
list
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.
(dict) --
Describes a NAT gateway rule to apply to a transit gateway attachment. A NAT gateway rule translates source addresses in the MatchSourceCidr range to the corresponding addresses in the NatCidr range.
RuleNumber (integer) --
The rule number. Valid values are 1 to 32766. Each rule number must be unique within the request.
MatchSourceCidr (string) --
The IPv4 CIDR block of the source addresses to translate. The CIDR block can't overlap the multicast range ( 224.0.0.0/4) or the link-local range ( 169.254.0.0/16).
NatCidr (string) --
The IPv4 CIDR block to translate the source addresses to. The CIDR block must be in a private (RFC 1918) or shared address space (RFC 6598) range, and must have the same prefix length as MatchSourceCidr. The CIDR blocks in the rules for an attachment can't overlap each other.
boolean
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.
boolean
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.
dict
Response Syntax
{
'TransitGatewayAttachmentId': 'string',
'NatGatewaySupport': 'enabled'|'disabled'|'enabling'|'disabling',
'NatSystemRouteSupport': 'enable'|'disable',
'NatGatewayRules': [
{
'RuleNumber': 123,
'MatchSourceCidr': 'string',
'NatCidr': 'string',
'State': 'pending'|'activated'|'deactivated'|'deleting'
},
]
}
Response Structure
(dict) --
TransitGatewayAttachmentId (string) --
The ID of the transit gateway attachment.
NatGatewaySupport (string) --
The state of NAT gateway support for the attachment.
NatSystemRouteSupport (string) --
Specifies whether the transit gateway installs routes for the NAT CIDRs in the route tables to which the attachment propagates.
NatGatewayRules (list) --
The NAT gateway rules for the attachment.
(dict) --
Contains information about a NAT gateway rule for a transit gateway attachment, including the rule number, the source CIDR block, the translated CIDR block, and the state of the rule.
RuleNumber (integer) --
The rule number.
MatchSourceCidr (string) --
The IPv4 CIDR block of the source addresses to translate.
NatCidr (string) --
The IPv4 CIDR block that the transit gateway translates the source addresses to.
State (string) --
The state of the NAT gateway rule. The possible values are:
pending - The transit gateway is applying a change to the rule.
activated - The rule is in effect because NAT gateway support is enabled for the attachment.
deactivated - The rule isn't in effect because NAT gateway support is disabled for the attachment.
Describes the NAT configuration for the specified transit gateway attachment. Only the owner of the transit gateway can describe the NAT configuration.
See also: AWS API Documentation
Request Syntax
client.get_transit_gateway_attachment_nat_configuration(
TransitGatewayAttachmentId='string',
DryRun=True|False
)
string
[REQUIRED]
The ID of the transit gateway attachment.
boolean
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.
dict
Response Syntax
{
'TransitGatewayAttachmentId': 'string',
'NatGatewaySupport': 'enabled'|'disabled'|'enabling'|'disabling',
'NatSystemRouteSupport': 'enable'|'disable',
'NatGatewayRules': [
{
'RuleNumber': 123,
'MatchSourceCidr': 'string',
'NatCidr': 'string',
'State': 'pending'|'activated'|'deactivated'|'deleting'
},
]
}
Response Structure
(dict) --
TransitGatewayAttachmentId (string) --
The ID of the transit gateway attachment.
NatGatewaySupport (string) --
The state of NAT gateway support for the attachment.
NatSystemRouteSupport (string) --
Specifies whether the transit gateway installs routes for the NAT CIDRs in the route tables to which the attachment propagates.
NatGatewayRules (list) --
The NAT gateway rules for the attachment.
(dict) --
Contains information about a NAT gateway rule for a transit gateway attachment, including the rule number, the source CIDR block, the translated CIDR block, and the state of the rule.
RuleNumber (integer) --
The rule number.
MatchSourceCidr (string) --
The IPv4 CIDR block of the source addresses to translate.
NatCidr (string) --
The IPv4 CIDR block that the transit gateway translates the source addresses to.
State (string) --
The state of the NAT gateway rule. The possible values are:
pending - The transit gateway is applying a change to the rule.
activated - The rule is in effect because NAT gateway support is enabled for the attachment.
deactivated - The rule isn't in effect because NAT gateway support is disabled for the attachment.
{'Route': {'Type': {'system'}}}
Creates a static route for the specified transit gateway route table.
See also: AWS API Documentation
Request Syntax
client.create_transit_gateway_route(
DestinationCidrBlock='string',
TransitGatewayRouteTableId='string',
TransitGatewayAttachmentId='string',
Blackhole=True|False,
DryRun=True|False
)
string
[REQUIRED]
The CIDR range used for destination matches. Routing decisions are based on the most specific match.
string
[REQUIRED]
The ID of the transit gateway route table.
string
The ID of the attachment.
boolean
Indicates whether to drop traffic that matches this route.
boolean
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.
dict
Response Syntax
{
'Route': {
'DestinationCidrBlock': 'string',
'PrefixListId': 'string',
'TransitGatewayRouteTableAnnouncementId': 'string',
'TransitGatewayAttachments': [
{
'ResourceId': 'string',
'TransitGatewayAttachmentId': 'string',
'ResourceType': 'vpc'|'vpn'|'vpn-concentrator'|'direct-connect-gateway'|'connect'|'peering'|'tgw-peering'|'network-function'|'client-vpn'
},
],
'Type': 'static'|'propagated'|'system',
'State': 'pending'|'active'|'blackhole'|'deleting'|'deleted'
}
}
Response Structure
(dict) --
Route (dict) --
Information about the route.
DestinationCidrBlock (string) --
The CIDR block used for destination matches.
PrefixListId (string) --
The ID of the prefix list used for destination matches.
TransitGatewayRouteTableAnnouncementId (string) --
The ID of the transit gateway route table announcement.
TransitGatewayAttachments (list) --
The attachments.
(dict) --
Describes a route attachment.
ResourceId (string) --
The ID of the resource.
TransitGatewayAttachmentId (string) --
The ID of the attachment.
ResourceType (string) --
The resource type. Note that the tgw-peering resource type has been deprecated.
Type (string) --
The route type.
State (string) --
The state of the route.
{'Route': {'Type': {'system'}}}
Deletes the specified route from the specified transit gateway route table.
See also: AWS API Documentation
Request Syntax
client.delete_transit_gateway_route(
TransitGatewayRouteTableId='string',
DestinationCidrBlock='string',
DryRun=True|False
)
string
[REQUIRED]
The ID of the transit gateway route table.
string
[REQUIRED]
The CIDR range for the route. This must match the CIDR for the route exactly.
boolean
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.
dict
Response Syntax
{
'Route': {
'DestinationCidrBlock': 'string',
'PrefixListId': 'string',
'TransitGatewayRouteTableAnnouncementId': 'string',
'TransitGatewayAttachments': [
{
'ResourceId': 'string',
'TransitGatewayAttachmentId': 'string',
'ResourceType': 'vpc'|'vpn'|'vpn-concentrator'|'direct-connect-gateway'|'connect'|'peering'|'tgw-peering'|'network-function'|'client-vpn'
},
],
'Type': 'static'|'propagated'|'system',
'State': 'pending'|'active'|'blackhole'|'deleting'|'deleted'
}
}
Response Structure
(dict) --
Route (dict) --
Information about the route.
DestinationCidrBlock (string) --
The CIDR block used for destination matches.
PrefixListId (string) --
The ID of the prefix list used for destination matches.
TransitGatewayRouteTableAnnouncementId (string) --
The ID of the transit gateway route table announcement.
TransitGatewayAttachments (list) --
The attachments.
(dict) --
Describes a route attachment.
ResourceId (string) --
The ID of the resource.
TransitGatewayAttachmentId (string) --
The ID of the attachment.
ResourceType (string) --
The resource type. Note that the tgw-peering resource type has been deprecated.
Type (string) --
The route type.
State (string) --
The state of the route.
{'TransitGatewayAttachments': {'NatGatewaySupport': 'enabled | disabled | '
'enabling | disabling'}}
Describes one or more attachments between resources and transit gateways. By default, all attachments are described. Alternatively, you can filter the results by attachment ID, attachment state, resource ID, or resource owner.
See also: AWS API Documentation
Request Syntax
client.describe_transit_gateway_attachments(
TransitGatewayAttachmentIds=[
'string',
],
Filters=[
{
'Name': 'string',
'Values': [
'string',
]
},
],
MaxResults=123,
NextToken='string',
DryRun=True|False
)
list
The IDs of the attachments.
(string) --
list
One or more filters. The possible values are:
association.state - The state of the association ( associating | associated | disassociating).
association.transit-gateway-route-table-id - The ID of the route table for the transit gateway.
resource-id - The ID of the resource.
resource-owner-id - The ID of the Amazon Web Services account that owns the resource.
resource-type - The resource type. Valid values are vpc | vpn | direct-connect-gateway | peering | connect.
state - The state of the attachment. Valid values are available | deleted | deleting | failed | failing | initiatingRequest | modifying | pendingAcceptance | pending | rollingBack | rejected | rejecting.
transit-gateway-attachment-id - The ID of the attachment.
transit-gateway-id - The ID of the transit gateway.
transit-gateway-owner-id - The ID of the Amazon Web Services account that owns the transit gateway.
(dict) --
A filter name and value pair that is used to return a more specific list of results from a describe operation. Filters can be used to match a set of resources by specific criteria, such as tags, attributes, or IDs.
If you specify multiple filters, the filters are joined with an AND, and the request returns only results that match all of the specified filters.
For more information, see List and filter using the CLI and API in the Amazon EC2 User Guide.
Name (string) --
The name of the filter. Filter names are case-sensitive.
Values (list) --
The filter values. Filter values are case-sensitive. If you specify multiple values for a filter, the values are joined with an OR, and the request returns all results that match any of the specified values.
(string) --
integer
The maximum number of results to return with a single call. To retrieve the remaining results, make another call with the returned nextToken value.
string
The token for the next page of results.
boolean
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.
dict
Response Syntax
{
'TransitGatewayAttachments': [
{
'TransitGatewayAttachmentId': 'string',
'TransitGatewayId': 'string',
'TransitGatewayOwnerId': 'string',
'ResourceOwnerId': 'string',
'ResourceType': 'vpc'|'vpn'|'vpn-concentrator'|'direct-connect-gateway'|'connect'|'peering'|'tgw-peering'|'network-function'|'client-vpn',
'ResourceId': 'string',
'State': 'initiating'|'initiatingRequest'|'pendingAcceptance'|'rollingBack'|'pending'|'available'|'modifying'|'deleting'|'deleted'|'failed'|'rejected'|'rejecting'|'failing',
'Association': {
'TransitGatewayRouteTableId': 'string',
'TransitGatewayPolicyTableId': 'string',
'State': 'associating'|'associated'|'disassociating'|'disassociated'
},
'CreationTime': datetime(2015, 1, 1),
'Tags': [
{
'Key': 'string',
'Value': 'string'
},
],
'NatGatewaySupport': 'enabled'|'disabled'|'enabling'|'disabling'
},
],
'NextToken': 'string'
}
Response Structure
(dict) --
TransitGatewayAttachments (list) --
Information about the attachments.
(dict) --
Describes an attachment between a resource and a transit gateway.
TransitGatewayAttachmentId (string) --
The ID of the attachment.
TransitGatewayId (string) --
The ID of the transit gateway.
TransitGatewayOwnerId (string) --
The ID of the Amazon Web Services account that owns the transit gateway.
ResourceOwnerId (string) --
The ID of the Amazon Web Services account that owns the resource.
ResourceType (string) --
The resource type. Note that the tgw-peering resource type has been deprecated.
ResourceId (string) --
The ID of the resource.
State (string) --
The attachment state. Note that the initiating state has been deprecated.
Association (dict) --
The association.
TransitGatewayRouteTableId (string) --
The ID of the route table for the transit gateway.
TransitGatewayPolicyTableId (string) --
The ID of the transit gateway policy table associated with the attachment.
State (string) --
The state of the association.
CreationTime (datetime) --
The creation time.
Tags (list) --
The tags for the attachment.
(dict) --
Describes a tag.
Key (string) --
The key of the tag.
Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws:.
Value (string) --
The value of the tag.
Constraints: Tag values are case-sensitive and accept a maximum of 256 Unicode characters.
NatGatewaySupport (string) --
The state of NAT gateway support for the attachment. Only the owner of the transit gateway receives this parameter.
NextToken (string) --
The token to use to retrieve the next page of results. This value is null when there are no more results to return.
{'Route': {'Type': {'system'}}}
Replaces the specified route in the specified transit gateway route table.
See also: AWS API Documentation
Request Syntax
client.replace_transit_gateway_route(
DestinationCidrBlock='string',
TransitGatewayRouteTableId='string',
TransitGatewayAttachmentId='string',
Blackhole=True|False,
DryRun=True|False
)
string
[REQUIRED]
The CIDR range used for the destination match. Routing decisions are based on the most specific match.
string
[REQUIRED]
The ID of the route table.
string
The ID of the attachment.
boolean
Indicates whether traffic matching this route is to be dropped.
boolean
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.
dict
Response Syntax
{
'Route': {
'DestinationCidrBlock': 'string',
'PrefixListId': 'string',
'TransitGatewayRouteTableAnnouncementId': 'string',
'TransitGatewayAttachments': [
{
'ResourceId': 'string',
'TransitGatewayAttachmentId': 'string',
'ResourceType': 'vpc'|'vpn'|'vpn-concentrator'|'direct-connect-gateway'|'connect'|'peering'|'tgw-peering'|'network-function'|'client-vpn'
},
],
'Type': 'static'|'propagated'|'system',
'State': 'pending'|'active'|'blackhole'|'deleting'|'deleted'
}
}
Response Structure
(dict) --
Route (dict) --
Information about the modified route.
DestinationCidrBlock (string) --
The CIDR block used for destination matches.
PrefixListId (string) --
The ID of the prefix list used for destination matches.
TransitGatewayRouteTableAnnouncementId (string) --
The ID of the transit gateway route table announcement.
TransitGatewayAttachments (list) --
The attachments.
(dict) --
Describes a route attachment.
ResourceId (string) --
The ID of the resource.
TransitGatewayAttachmentId (string) --
The ID of the attachment.
ResourceType (string) --
The resource type. Note that the tgw-peering resource type has been deprecated.
Type (string) --
The route type.
State (string) --
The state of the route.
{'Routes': {'Type': {'system'}}}
Searches for routes in the specified transit gateway route table.
See also: AWS API Documentation
Request Syntax
client.search_transit_gateway_routes(
TransitGatewayRouteTableId='string',
Filters=[
{
'Name': 'string',
'Values': [
'string',
]
},
],
MaxResults=123,
DryRun=True|False,
NextToken='string'
)
string
[REQUIRED]
The ID of the transit gateway route table.
list
[REQUIRED]
One or more filters. The possible values are:
attachment.transit-gateway-attachment-id- The id of the transit gateway attachment.
attachment.resource-id - The resource id of the transit gateway attachment.
attachment.resource-type - The attachment resource type. Valid values are vpc | vpn | direct-connect-gateway | peering | connect.
prefix-list-id - The ID of the prefix list.
route-search.exact-match - The exact match of the specified filter.
route-search.longest-prefix-match - The longest prefix that matches the route.
route-search.subnet-of-match - The routes with a subnet that match the specified CIDR filter.
route-search.supernet-of-match - The routes with a CIDR that encompass the CIDR filter. For example, if you have 10.0.1.0/29 and 10.0.1.0/31 routes in your route table and you specify supernet-of-match as 10.0.1.0/30, then the result returns 10.0.1.0/29.
state - The state of the route ( active | blackhole).
type - The type of route ( propagated | static).
(dict) --
A filter name and value pair that is used to return a more specific list of results from a describe operation. Filters can be used to match a set of resources by specific criteria, such as tags, attributes, or IDs.
If you specify multiple filters, the filters are joined with an AND, and the request returns only results that match all of the specified filters.
For more information, see List and filter using the CLI and API in the Amazon EC2 User Guide.
Name (string) --
The name of the filter. Filter names are case-sensitive.
Values (list) --
The filter values. Filter values are case-sensitive. If you specify multiple values for a filter, the values are joined with an OR, and the request returns all results that match any of the specified values.
(string) --
integer
The maximum number of routes to return. If a value is not provided, the default is 1000.
boolean
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.
string
The token for the next page of results.
dict
Response Syntax
{
'Routes': [
{
'DestinationCidrBlock': 'string',
'PrefixListId': 'string',
'TransitGatewayRouteTableAnnouncementId': 'string',
'TransitGatewayAttachments': [
{
'ResourceId': 'string',
'TransitGatewayAttachmentId': 'string',
'ResourceType': 'vpc'|'vpn'|'vpn-concentrator'|'direct-connect-gateway'|'connect'|'peering'|'tgw-peering'|'network-function'|'client-vpn'
},
],
'Type': 'static'|'propagated'|'system',
'State': 'pending'|'active'|'blackhole'|'deleting'|'deleted'
},
],
'AdditionalRoutesAvailable': True|False,
'NextToken': 'string'
}
Response Structure
(dict) --
Routes (list) --
Information about the routes.
(dict) --
Describes a route for a transit gateway route table.
DestinationCidrBlock (string) --
The CIDR block used for destination matches.
PrefixListId (string) --
The ID of the prefix list used for destination matches.
TransitGatewayRouteTableAnnouncementId (string) --
The ID of the transit gateway route table announcement.
TransitGatewayAttachments (list) --
The attachments.
(dict) --
Describes a route attachment.
ResourceId (string) --
The ID of the resource.
TransitGatewayAttachmentId (string) --
The ID of the attachment.
ResourceType (string) --
The resource type. Note that the tgw-peering resource type has been deprecated.
Type (string) --
The route type.
State (string) --
The state of the route.
AdditionalRoutesAvailable (boolean) --
Indicates whether there are additional routes available.
NextToken (string) --
The token to use to retrieve the next page of results. This value is null when there are no more results to return.