ModifyHostsPort - Bastionhost - Alibaba Cloud Documentation Center

Operation description

Usage notes

You can call this operation to change the port for the O&M protocol on one or more hosts. If the standard port for the O&M protocol on your host is vulnerable to attacks, you can call this operation to specify a custom port. For example, the standard port for SSH is port 22.

Note

Ports 0 to 1024 are reserved for Bastionhost. Do not change the port for the O&M protocol to a reserved port.

QPS limit

You can call this operation up to 10 times per second per account. If the number of the calls per second exceeds the limit, throttling is triggered. As a result, your business may be affected. We recommend that you take note of the limit when you call this operation.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

yundun-bastionhost:ModifyHostsPort

update

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
InstanceId	string	Yes	The ID of the bastion host for which you want to change the port of the host. Note You can call the DescribeInstances operation to query the ID of the bastion host.	bastionhost-cn-st220aw****
RegionId	string	No	The region ID of the bastion host for which you want to change the port of the host. Note For more information about the mapping between region IDs and region names, see Regions and zones.	cn-hangzhou
HostIds	string	Yes	The ID of the host for which you want to change the port. The value is a JSON string. You can add up to 100 host IDs. If you specify multiple IDs, separate the IDs with commas (,). Note You can call the ListHosts operation to query the IDs of hosts.	["1","2","3"]
ProtocolName	string	Yes	The protocol that is used to connect to the host. Valid values: SSH RDP	SSH
Port	string	Yes	The new port of the host. The port number must be an integer. Valid values: 22 to 65535.	22

Response elements

Element	Type	Description	Example
	object
RequestId	string	The ID of the request, which is used to locate and troubleshoot issues.	EC9BF0F4-8983-491A-BC8C-1B4DD94976DE
Results	array<object>	The result of the call.
	object
Code	string	The return code that indicates whether the call was successful. Valid values: OK: The call was successful. UNEXPECTED: An unknown error occurred. INVALID_ARGUMENT: A request parameter is invalid. Note Make sure that the request parameters are valid and call the operation again. OBJECT_NOT_FOUND: The specified object on which you want to perform the operation does not exist. Note Check whether the specified ID of the bastion host exists, whether the specified hosts exist, and whether the specified host IDs are valid. Then, call the operation again. OBJECT_AlREADY_EXISTS: The specified object on which you want to perform the operation already exists.	OK
Message	string	This parameter is deprecated.	None
HostId	string	The ID of the host.	1

Examples

Success response

JSON format

{
  "RequestId": "EC9BF0F4-8983-491A-BC8C-1B4DD94976DE",
  "Results": [
    {
      "Code": "OK",
      "Message": "None",
      "HostId": "1"
    }
  ]
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidParameter	The argument is invalid.	The argument is invalid.
500	InternalError	An unknown error occurred.	An unknown error occurred.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.