Help Center/ Virtual Private Cloud/ API Reference/ VPC APIs (V3)/ Security Group/ Creating a Security Group
Updated on 2025-08-19 GMT+08:00
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Creating a Security Group

Function

A security group is a collection of access control rules for cloud instances, such as cloud servers, containers, and databases, that have the same security requirements and that are mutually trusted within a VPC. You can define different access control rules for a security group, and these rules are then applied to all the instances added to this security group.

Constraints

By default, a security group only allows instances in it to communicate with each other.

Calling Method

For details, see Calling APIs.

URI

POST /v3/{project_id}/vpc/security-groups

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

  • Definition: ID of the project that a security group belongs to. For details about how to obtain a project ID, see Obtaining a Project ID.

  • Range: None

Request Parameters

Table 2 Request body parameters

Parameter

Mandatory

Type

Description

dry_run

No

Boolean

  • Definition: Whether to only send the check request.

  • Constraints: None

  • Range:

    • true: A check request will be sent and no security group will be created. Check items include mandatory parameters, request format, and constraints. If the check fails, an error will be returned. If the check succeeds, response code 202 will be returned.

    • false: A request will be sent and a security group will be created.

  • Default Value: false

security_group

Yes

CreateSecurityGroupOption object

  • Definition: Request body for creating a security group.

  • Constraints: None

  • Range: None

  • Default Value: None
Table 3 CreateSecurityGroupOption

Parameter

Mandatory

Type

Description

name

Yes

String

  • Definition: Name of a security group.

  • Constraints: The value can contain 1 to 64 characters, including letters, digits, underscores (_), hyphens (-), and periods (.).

  • Range: None

  • Default Value: None

description

No

String

  • Definition: Description of a security group.

  • Constraints: The value can contain no more than 255 characters and cannot contain angle brackets (< or >).

  • Range: None

  • Default Value: None

enterprise_project_id

No

String

  • Definition: ID of the enterprise project that a security group belongs to.

  • Constraints:

    • The value can contain a maximum of 36 bytes.

    • The value is 0 or a string in UUID format with hyphens (-).

  • Range: None

  • Default Value: 0 (default enterprise project)

tags

No

Array of RequestTag objects

  • Definition: Tags of a security group, including tag keys and tag values, which can be used to classify and identify resources. For details, see the tag objects.

  • Constraints: A maximum of 20 tag key-value pairs are supported.

  • Range: None

  • Default Value: None
Table 4 RequestTag

Parameter

Mandatory

Type

Description

key

Yes

String

Definition:

Tag key.

Constraints:

N/A

Range:

  • A tag key can contain a maximum of 128 Unicode characters and cannot be left blank.

  • Each tag key of a resource must be unique.

  • The value can contain:

    • Letters

    • Digits

    • Special characters: underscores (_), hyphens (-)

    • Chinese characters

    Default Value:

N/A

value

Yes

String

Definition:

Tag value.

Constraints:

N/A

Range:

  • Each value can contain a maximum of 255 Unicode characters and can be left blank.

  • The value can contain:

    • Letters

    • Digits

    • Special characters: underscores (_), hyphens (-), periods (.)

    • Chinese characters

    Default Value:

N/A

Response Parameters

Status code: 201

Table 5 Response body parameters

Parameter

Type

Description

request_id

String

  • Definition: Request ID.

  • Range: None

security_group

SecurityGroupInfo object

  • Definition: Response body for creating a security group.

  • Range: None
Table 6 SecurityGroupInfo

Parameter

Type

Description

id

String

  • Definition: ID of a security group. After a security group is created, a security group ID is generated, which uniquely identifies the security group.

  • Range: The value is in UUID format with hyphens (-).

name

String

  • Definition: Name of a security group.

  • Range: The value can contain 1 to 64 characters, including letters, digits, underscores (_), hyphens (-), and periods (.).

description

String

  • Definition: Description of a security group.

  • Range: The value can contain no more than 255 characters and cannot contain angle brackets (< or >).

project_id

String

  • Definition: ID of the project that a security group belongs to.

  • Range: None

created_at

String

  • Definition: Time when a security group was created.

  • Range: UTC time in the format of yyyy-MM-ddTHH:mm:ssZ

updated_at

String

  • Definition: Time when a security group was updated.

  • Range: UTC time in the format of yyyy-MM-ddTHH:mm:ssZ

enterprise_project_id

String

  • Definition: ID of the enterprise project that a security group belongs to.

  • Range: The value is 0 or a string that contains a maximum of 36 characters in UUID format with hyphens (-). 0 indicates the default enterprise project.

tags

Array of ResponseTag objects

  • Definition: Tags of a security group, including tag keys and tag values, which can be used to classify and identify resources. For details, see the tag objects.

  • Range: None

security_group_rules

Array of SecurityGroupRule objects

  • Definition: Security group rule list.

  • Range: None
Table 7 ResponseTag

Parameter

Type

Description

key

String

Definition:

Tag key.

Range:

  • A tag key can contain a maximum of 128 Unicode characters and cannot be left blank.

  • Each tag key of a resource must be unique.

  • The value can contain:

    • Letters

    • Digits

    • Special characters: underscores (_), hyphens (-)

    • Chinese characters

value

String

Definition:

Tag value.

Range:

  • Each value can contain a maximum of 255 Unicode characters and can be left blank.

  • The value can contain:

    • Letters

    • Digits

    • Special characters: underscores (_), hyphens (-), periods (.)

    • Chinese characters
Table 8 SecurityGroupRule

Parameter

Type

Description

id

String

  • Definition: ID of a security group rule. After a security group rule is created, a security group rule ID is generated, which uniquely identifies the security group rule.

  • Range: The value is in UUID format with hyphens (-).

description

String

  • Definition: Description of a security group rule.

  • Range: The value can contain no more than 255 characters and cannot contain angle brackets (< or >).

security_group_id

String

  • Definition: ID of the security group that a security group rule belongs to.

  • Range: None

direction

String

  • Definition: Inbound or outbound direction of a security group rule.

  • Range:

    • ingress: inbound direction

    • egress: outbound direction

protocol

String

  • Definition: Communication protocol of a security group rule.

  • Range:

    • icmp

    • tcp

    • udp

    • icmpv6

    • IP protocol number

ethertype

String

  • Definition: IP address version of a security group rule.

  • Range:

    • IPv4

    • IPv6

multiport

String

  • Definition: Port range of a security group rule.

  • Range: The value can be a single port (80), a port range (1-30), or inconsecutive ports separated by commas (22,3389,80).

action

String

  • Definition: Action of a security group rule.

  • Range:

    • allow

    • deny

priority

Integer

  • Definition: Priority of a security group rule.

  • Range: The value is from 1 to 100. The value 1 indicates the highest priority.

remote_group_id

String

  • Definition: ID of the remote security group of a security group rule. If the action of the rule is allow, the traffic from the remote security group is allowed. If the action of the rule is deny, the traffic from the remote security group is denied.

  • Range: ID of an existing security group.

remote_ip_prefix

String

  • Definition: Remote IP address of a security group rule.

    • If direction is set to egress, the IP address is the outbound destination and will be accessed by instances in the security group.

    • If direction is set to ingress, the IP address is the inbound source and will access the instances in the security group.

  • Range: CIDR notation format. If an IP address is transferred in the request, the IP address is automatically formatted with /32 as the subnet mask, for example, 192.168.21.45/32.

remote_address_group_id

String

  • Definition: ID of the remote IP address group of a security group rule.

  • Range: ID of an existing IP address group.

created_at

String

  • Definition: Time when a security group rule was created.

  • Range: UTC time in the format of yyyy-MM-ddTHH:mm:ssZ

updated_at

String

  • Definition: Time when a security group rule was updated.

  • Range: UTC time in the format of yyyy-MM-ddTHH:mm:ssZ

project_id

String

  • Definition: ID of the project that a security group rule belongs to.

  • Range: None

enabled

Boolean

  • Definition: Whether to enable a security group rule.

  • Range:

    • true: The security group rule is enabled.

    • false: The security group rule is disabled.

Status code: 202

Table 9 Response body parameters

Parameter

Type

Description

request_id

String

  • Definition: Request ID.

  • Range: None

error_msg

String

  • Definition: Error message.

  • Range: None

error_code

String

  • Definition: Error code.

  • Range: None

Example Requests

  • Create a security group, set its name to security_group_1 and description to security group description, and specify the request as a prefight request.

    POST https://{Endpoint}/v3/{project_id}/vpc/security-groups

{
  "security_group" : {
    "name" : "security_group_1",
    "description" : "security group description"
  },
  "dry_run" : true
}

  • Create a security group and set its name to security_group_1* and description to security group description.

    POST https://{Endpoint}/v3/{project_id}/vpc/security-groups

{
  "security_group" : {
    "name" : "security_group_1",
    "description" : "security group description"
  }
}

Example Responses

Status code: 201

Normal response to the POST operation. For more status codes, see Status Code.

  • {
  "security_group" : {
    "id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
    "name" : "security_group_1",
    "project_id" : "060576782980d5762f9ec014dd2f1148",
    "description" : "security group description",
    "enterprise_project_id" : "0",
    "tags" : [ ],
    "security_group_rules" : [ {
      "id" : "f11a3824-ac19-4fad-b4f1-c5f4a6dd0a80",
      "project_id" : "060576782980d5762f9ec014dd2f1148",
      "security_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "remote_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "direction" : "ingress",
      "protocol" : null,
      "description" : "",
      "created_at" : "2020-07-09T05:56:27Z",
      "updated_at" : "2020-07-09T05:56:27Z",
      "ethertype" : "IPv6",
      "remote_ip_prefix" : null,
      "multiport" : null,
      "remote_address_group_id" : null,
      "action" : "allow",
      "priority" : 100,
      "enabled" : true
    }, {
      "id" : "3d6480e8-9ea4-46dc-bb1b-8db190cd5677",
      "project_id" : "060576782980d5762f9ec014dd2f1148",
      "security_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "remote_group_id" : null,
      "direction" : "egress",
      "protocol" : null,
      "description" : "",
      "created_at" : "2020-07-09T05:56:27Z",
      "updated_at" : "2020-07-09T05:56:27Z",
      "ethertype" : "IPv6",
      "remote_ip_prefix" : null,
      "multiport" : null,
      "remote_address_group_id" : null,
      "action" : "allow",
      "priority" : 100,
      "enabled" : true
    }, {
      "id" : "9581f18c-1fdd-43da-ace9-7758a56ef28a",
      "project_id" : "060576782980d5762f9ec014dd2f1148",
      "security_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "remote_group_id" : null,
      "direction" : "egress",
      "protocol" : null,
      "description" : "",
      "created_at" : "2020-07-09T05:56:27Z",
      "updated_at" : "2020-07-09T05:56:27Z",
      "ethertype" : "IPv4",
      "remote_ip_prefix" : null,
      "multiport" : null,
      "remote_address_group_id" : null,
      "action" : "allow",
      "priority" : 100,
      "enabled" : true
    }, {
      "id" : "a3ba270e-e58b-432d-a912-aeb7eace9fb8",
      "project_id" : "060576782980d5762f9ec014dd2f1148",
      "security_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "remote_group_id" : "69c999ad-d9ef-4d79-94fd-35e6ceb75325",
      "direction" : "ingress",
      "protocol" : null,
      "description" : "",
      "created_at" : "2020-07-09T05:56:27Z",
      "updated_at" : "2020-07-09T05:56:27Z",
      "ethertype" : "IPv4",
      "remote_ip_prefix" : null,
      "multiport" : null,
      "remote_address_group_id" : null,
      "action" : "allow",
      "priority" : 100,
      "enabled" : true
    } ],
    "created_at" : "2020-07-09T05:56:27Z",
    "updated_at" : "2020-07-09T05:56:27Z"
  },
  "request_id" : "a8cf4f79ca3c22ca685e7e8872e8c20b"
}

Status code: 202

Normal response for the specified pre-check request of API V3. For more status codes, see Status Code.

{
  "error_msg" : "Request validation has been passed with dry run...",
  "error_code" : "SYS.0202",
  "request_id" : "cfd81aea3f59eac7128dba4b36d516c8"
}

SDK Sample Code

The SDK sample code is as follows.

  • Create a security group, set its name to security_group_1 and description to security group description, and specify the request as a prefight request.

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    package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.vpc.v3.region.VpcRegion;
import com.huaweicloud.sdk.vpc.v3.*;
import com.huaweicloud.sdk.vpc.v3.model.*;


public class CreateSecurityGroupSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        VpcClient client = VpcClient.newBuilder()
                .withCredential(auth)
                .withRegion(VpcRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateSecurityGroupRequest request = new CreateSecurityGroupRequest();
        CreateSecurityGroupRequestBody body = new CreateSecurityGroupRequestBody();
        CreateSecurityGroupOption securityGroupbody = new CreateSecurityGroupOption();
        securityGroupbody.withName("security_group_1")
            .withDescription("security group description");
        body.withSecurityGroup(securityGroupbody);
        body.withDryRun(true);
        request.withBody(body);
        try {
            CreateSecurityGroupResponse response = client.createSecurityGroup(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

  • Create a security group and set its name to security_group_1* and description to security group description.

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    package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.vpc.v3.region.VpcRegion;
import com.huaweicloud.sdk.vpc.v3.*;
import com.huaweicloud.sdk.vpc.v3.model.*;


public class CreateSecurityGroupSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        VpcClient client = VpcClient.newBuilder()
                .withCredential(auth)
                .withRegion(VpcRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateSecurityGroupRequest request = new CreateSecurityGroupRequest();
        CreateSecurityGroupRequestBody body = new CreateSecurityGroupRequestBody();
        CreateSecurityGroupOption securityGroupbody = new CreateSecurityGroupOption();
        securityGroupbody.withName("security_group_1")
            .withDescription("security group description");
        body.withSecurityGroup(securityGroupbody);
        request.withBody(body);
        try {
            CreateSecurityGroupResponse response = client.createSecurityGroup(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

  • Create a security group, set its name to security_group_1 and description to security group description, and specify the request as a prefight request.

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    # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkvpc.v3.region.vpc_region import VpcRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkvpc.v3 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = VpcClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(VpcRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateSecurityGroupRequest()
        securityGroupbody = CreateSecurityGroupOption(
            name="security_group_1",
            description="security group description"
        )
        request.body = CreateSecurityGroupRequestBody(
            security_group=securityGroupbody,
            dry_run=True
        )
        response = client.create_security_group(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

  • Create a security group and set its name to security_group_1* and description to security group description.

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    # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkvpc.v3.region.vpc_region import VpcRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkvpc.v3 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = VpcClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(VpcRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateSecurityGroupRequest()
        securityGroupbody = CreateSecurityGroupOption(
            name="security_group_1",
            description="security group description"
        )
        request.body = CreateSecurityGroupRequestBody(
            security_group=securityGroupbody
        )
        response = client.create_security_group(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

  • Create a security group, set its name to security_group_1 and description to security group description, and specify the request as a prefight request.

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    package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    vpc "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := vpc.NewVpcClient(
        vpc.VpcClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CreateSecurityGroupRequest{}
	descriptionSecurityGroup:= "security group description"
	securityGroupbody := &model.CreateSecurityGroupOption{
		Name: "security_group_1",
		Description: &descriptionSecurityGroup,
	}
	dryRunCreateSecurityGroupRequestBody:= true
	request.Body = &model.CreateSecurityGroupRequestBody{
		SecurityGroup: securityGroupbody,
		DryRun: &dryRunCreateSecurityGroupRequestBody,
	}
	response, err := client.CreateSecurityGroup(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

  • Create a security group and set its name to security_group_1* and description to security group description.

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    package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    vpc "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/vpc/v3/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := vpc.NewVpcClient(
        vpc.VpcClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CreateSecurityGroupRequest{}
	descriptionSecurityGroup:= "security group description"
	securityGroupbody := &model.CreateSecurityGroupOption{
		Name: "security_group_1",
		Description: &descriptionSecurityGroup,
	}
	request.Body = &model.CreateSecurityGroupRequestBody{
		SecurityGroup: securityGroupbody,
	}
	response, err := client.CreateSecurityGroup(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

201

Normal response to the POST operation. For more status codes, see Status Code.

202

Normal response for the specified pre-check request of API V3. For more status codes, see Status Code.

Error Codes

See Error Codes.

Parent Topic: Security Group