ListListeners - Server Load Balancer - Alibaba Cloud Documentation Center

Queries listeners added to a Network Load Balancer (NLB) instance.

Debugging

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Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- For mandatory resource types, indicate with a prefix of * .
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
nlb:ListListeners	get	Listener `acs:nlb:{#regionId}:{#accountId}:listener/`	none	none

Request parameters

Parameter	Type	Required	Description	Example
ListenerIds	array	No	The listener IDs. You can specify up to 20 listeners.
ListenerId	string	No	The listener ID. You can specify up to 20 listeners.	lsn-bp1bpn0kn908w4nbw****@443
LoadBalancerIds	array	No	The IDs of the NLB instances. You can specify up to 20 instances.
LoadBalancerId	string	No	The ID of the NLB instance. You can specify up to 20 instances.	nlb-83ckzc8d4xlp8o****
ListenerProtocol	string	No	The listener protocol. Valid values: TCP, UDP, and TCPSSL.	TCPSSL
Tag	array<object>	No	The tags.
	object	No	The tag.
Key	string	No	The key of the tag. You can specify up to 20 tags. The tag key cannot be an empty string. It can be up to 64 characters in length, cannot start with `aliyun` or `acs:`, and cannot contain `http://` or `https://`.	env
Value	string	No	The value of the tag. You can specify up to 20 tags. The tag value can be an empty string. It can be up to 128 characters in length, cannot start with `aliyun` or `acs:`, and cannot contain `http://` or `https://`.	product
NextToken	string	No	The pagination token used to specify a particular page of results. Valid values: Leave this parameter empty for the first query or the only query. Set this parameter to the value of NextToken obtained from the previous query.	FFmyTO70tTpLG6I3FmYAXGKPd****
MaxResults	integer	No	The number of entries to return in each call. Valid values: 1 to 100. Default value: 20	20
RegionId	string	No	The ID of the region where the NLB instance is deployed. You can call the DescribeRegions operation to query the most recent region list.	cn-hangzhou
SecSensorEnabled	string	No	Specifies whether to enable fine-grained monitoring. Valid values: true false	false

Response parameters

Parameter	Type	Description	Example
	object	The operation to query listeners.
RequestId	string	The ID of the request.	CEF72CEB-54B6-4AE8-B225-F876FF7BA984
Listeners	array<object>	The listeners.
ListenerInfo	object	The listeners.
Tags	array<object>	A list of tags.
tagModels	object	A list of tags.
Key	string	The tag key.	Created
Value	string	The tag value.	TF
LoadBalancerId	string	The CLB instance ID.	nlb-83ckzc8d4xlp8o****
ListenerId	string	The listener ID.	lsn-ga6sjjcll6ou34l1et****
ListenerProtocol	string	The listener protocol. Valid values: TCP, UDP, and TCPSSL.	TCPSSL
ListenerPort	integer	The information about the listener port of your server.	443
StartPort	string	The first port in the listener port range.	233
EndPort	string	The last port in the listener port range.	455
ListenerDescription	string	The name of the listener. The name must be 2 to 256 characters in length, and can contain letters, digits, commas (,), periods (.), semicolons (;), forward slashes (/), at signs (@), underscores (_), and hyphens (-).	tcpssl_443
ServerGroupId	string	The server group ID.	sgp-ppdpc14gdm3x4o****
IdleTimeout	integer	The timeout period of idle connections. Unit: seconds. Valid values: 1 to 900. Default value: 900.	900
SecurityPolicyId	string	The ID of the security policy. Note This parameter takes effect only for listeners that use SSL over TCP.	tls_cipher_policy_1_1
CertificateIds	array	The server certificate. Note This parameter takes effect only for listeners that use SSL over TCP.
CertificateId	string	The server certificate. Note This parameter takes effect only for listeners that use SSL over TCP.	12315790212_166f8204689_1714763408_70998****
CaCertificateIds	array	A list of CA certificates. Note This parameter takes effect only for listeners that use SSL over TCP.
CaCertificateId	string	A list of CA certificates. Note This parameter takes effect only for listeners that use SSL over TCP.	139a00604ad-cn-east-hangzh****
CaEnabled	boolean	Indicates whether mutual authentication is enabled. Valid values: true false	false
ListenerStatus	string	The status of the listener. Valid values: Provisioning: The listener is being created. Running: The listener is running. Configuring: The listener is being configured. Stopping: The listener is being stopped. Stopped: The listener is stopped. Starting: The listener is being started. Deleting: The listener is being deleted. Deleted: The listener is deleted.	Running
RegionId	string	The region ID of the NLB instance.	cn-hangzhou
AlpnEnabled	boolean	Indicates whether Application-Layer Protocol Negotiation (ALPN) is enabled. Valid values: true false	false
AlpnPolicy	string	The ALPN policy. Valid values: HTTP1Only HTTP2Only HTTP2Preferred HTTP2Optional	HTTP1Only
SecSensorEnabled	boolean	Indicates whether fine-grained monitoring is enabled. Valid values: true false	false
ProxyProtocolEnabled	boolean	Indicates whether the Proxy protocol passes source client IP addresses to backend servers. Valid values: true false	false
ProxyProtocolV2Config	object	Indicates whether the Proxy protocol passes the VpcId, PrivateLinkEpId, and PrivateLinkEpsId parameters to backend servers.
Ppv2VpcIdEnabled	boolean	Indicates whether the Proxy protocol passes the VpcId parameter to backend servers. Valid values: true false	false
Ppv2PrivateLinkEpIdEnabled	boolean	Indicates whether the Proxy protocol passes the PrivateLinkEpId parameter to backend servers. Valid values: true false	false
Ppv2PrivateLinkEpsIdEnabled	boolean	Indicates whether the Proxy protocol passes the PrivateLinkEpsId parameter to backend servers. Valid values: true false	false
Cps	integer	The maximum number of new connections per second supported by the listener in each zone (virtual IP address). Valid values: 0 to 1000000. 0 indicates that the number of connections is unlimited.	1000
Mss	integer	The size of the largest TCP packet segment. Unit: bytes. Valid values: 0 to 1500. 0 indicates that the Mss value of TCP packets remains unchanged. Note This parameter takes effect only for listeners that use SSL over TCP.	200
TotalCount	integer	The number of entries returned.	4
NextToken	string	The token that is used for the next query. Valid values: If NextToken is empty, it indicates that no next query is to be sent. If a value of NextToken is returned, the value is the token used for the next query.	FFmyTO70tTpLG6I3FmYAXGKPd****
MaxResults	integer	The number of entries returned per page.	20

Examples

Sample success responses

JSONformat

{
  "RequestId": "CEF72CEB-54B6-4AE8-B225-F876FF7BA984",
  "Listeners": [
    {
      "Tags": [
        {
          "Key": "Created",
          "Value": "TF"
        }
      ],
      "LoadBalancerId": "nlb-83ckzc8d4xlp8o****",
      "ListenerId": "lsn-ga6sjjcll6ou34l1et****",
      "ListenerProtocol": "TCPSSL",
      "ListenerPort": 443,
      "StartPort": "233",
      "EndPort": "455",
      "ListenerDescription": "tcpssl_443",
      "ServerGroupId": "sgp-ppdpc14gdm3x4o****",
      "IdleTimeout": 900,
      "SecurityPolicyId": "tls_cipher_policy_1_1",
      "CertificateIds": [
        "12315790212_166f8204689_1714763408_70998****"
      ],
      "CaCertificateIds": [
        "139a00604ad-cn-east-hangzh****"
      ],
      "CaEnabled": false,
      "ListenerStatus": "Running",
      "RegionId": "cn-hangzhou",
      "AlpnEnabled": false,
      "AlpnPolicy": "HTTP1Only",
      "SecSensorEnabled": false,
      "ProxyProtocolEnabled": false,
      "ProxyProtocolV2Config": {
        "Ppv2VpcIdEnabled": false,
        "Ppv2PrivateLinkEpIdEnabled": false,
        "Ppv2PrivateLinkEpsIdEnabled": false
      },
      "Cps": 1000,
      "Mss": 200
    }
  ],
  "TotalCount": 4,
  "NextToken": "FFmyTO70tTpLG6I3FmYAXGKPd****",
  "MaxResults": 20
}

Error codes

HTTP status code	Error code	Error message	Description
400	SystemBusy	System is busy, please try again later.	-
400	IllegalParam	The param of %s is illegal.	-
403	Forbidden.NoPermission	Authentication is failed for NoPermission.	Authentication is failed for NoPermission.

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation
2024-02-29	The Error code has changed	View Change Details
2023-12-12	The Error code has changed. The response structure of the API has changed	View Change Details
2023-11-27	The Error code has changed. The response structure of the API has changed	View Change Details
2023-09-26	The Error code has changed	View Change Details
2023-09-05	The Error code has changed	View Change Details
2023-08-22	The Error code has changed	View Change Details
2023-06-29	The request parameters of the API has changed. The response structure of the API has changed	View Change Details