GS2-Guard Deploy/CDK Reference

The template format used when creating stacks with GS2-Deploy, and implementation examples of template output in various languages using CDK

Entities

Resources targeted by the Deploy operation

Namespace

A Namespace allows multiple independent instances of the same service within a single project by separating data spaces and usage contexts.

Each GS2 service is managed on a per-namespace basis. Even when using the same service, if the namespace differs, the data is treated as a completely independent data space.

Therefore, you must create a namespace before you can start using each service.

Request

Resource creation and update requests

	Type	Required	Value Limits	Description
name	string	✓	~ 128 chars	Namespace name Namespace-specific name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).
description	string		~ 1024 chars	Description
blockingPolicy	BlockingPolicyModel	✓		Blocking Policy The security policy configuration for this namespace that controls access to GS2 services. Defines which services are accessible, geo-restriction rules, anonymous IP detection, hosting provider IP detection, reputation-based IP filtering, and custom IP address allow/deny lists.

GetAttr

Resource creation results that can be retrieved using the !GetAttr tag

	Type	Description
Item	Namespace	Namespace created

Implementation Example

Type: GS2::Guard::Namespace
Properties:
  Name: namespace-0001
  Description: null
  BlockingPolicy: 
    PassServices: 
    - account
    DefaultRestriction: Deny
    LocationDetection: Disable
    AnonymousIpDetection: Disable
    HostingProviderIpDetection: Disable
    ReputationIpDetection: Disable
    IpAddressesDetection: Enable
    IpAddresses: 
    - 192.168.0.0/24
    IpAddressRestriction: Allow

import (
    "github.com/gs2io/gs2-golang-cdk/core"
    "github.com/gs2io/gs2-golang-cdk/guard"
)


SampleStack := core.NewStack()
guard.NewNamespace(
    &SampleStack,
    "namespace-0001",
    guard.BlockingPolicyModel{
        PassServices: []string{
            "account",
        },
        DefaultRestriction: guard.BlockingPolicyModelDefaultRestrictionDeny,
        LocationDetection: guard.BlockingPolicyModelLocationDetectionDisable,
        AnonymousIpDetection: guard.BlockingPolicyModelAnonymousIpDetectionDisable,
        HostingProviderIpDetection: guard.BlockingPolicyModelHostingProviderIpDetectionDisable,
        ReputationIpDetection: guard.BlockingPolicyModelReputationIpDetectionDisable,
        IpAddressesDetection: guard.BlockingPolicyModelIpAddressesDetectionEnable,
        IpAddresses: []string{
            "192.168.0.0/24",
        },
        IpAddressRestriction: guard.BlockingPolicyModelIpAddressRestrictionAllow.Pointer(),
    },
    guard.NamespaceOptions{},
)

println(SampleStack.Yaml())  // Generate Template

class SampleStack extends \Gs2Cdk\Core\Model\Stack
{
    function __construct() {
        parent::__construct();
        new \Gs2Cdk\Guard\Model\Namespace_(
            stack: $this,
            name: "namespace-0001",
            blockingPolicy: new \Gs2Cdk\Guard\Model\BlockingPolicyModel(
                passServices: [
                    "account",
                ],
                defaultRestriction: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelDefaultRestriction::DENY,
                locationDetection: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelLocationDetection::DISABLE,
                anonymousIpDetection: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelAnonymousIpDetection::DISABLE,
                hostingProviderIpDetection: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelHostingProviderIpDetection::DISABLE,
                reputationIpDetection: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelReputationIpDetection::DISABLE,
                ipAddressesDetection: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelIpAddressesDetection::ENABLE,
                options: new \Gs2Cdk\Guard\Model\Options\BlockingPolicyModelOptions(
                    ipAddresses: [
                        "192.168.0.0/24",
                    ],
                    ipAddressRestriction: Gs2Cdk\Guard\Model\Enums\BlockingPolicyModelIpAddressRestriction::ALLOW
                )
            )
        );
    }
}

print((new SampleStack())->yaml());  // Generate Template

class SampleStack extends io.gs2.cdk.core.model.Stack
{
    public SampleStack() {
        super();
        new io.gs2.cdk.guard.model.Namespace(
                this,
                "namespace-0001",
                new io.gs2.cdk.guard.model.BlockingPolicyModel(
                Arrays.asList(
                    "account"
                ),
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelDefaultRestriction.DENY,
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelLocationDetection.DISABLE,
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelAnonymousIpDetection.DISABLE,
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelHostingProviderIpDetection.DISABLE,
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelReputationIpDetection.DISABLE,
                io.gs2.cdk.guard.model.enums.BlockingPolicyModelIpAddressesDetection.ENABLE,
                new io.gs2.cdk.guard.model.options.BlockingPolicyModelOptions()
                    .withIpAddresses(
                        Arrays.asList(
                            "192.168.0.0/24"
                        )
                    )
                    .withIpAddressRestriction(
                        io.gs2.cdk.guard.model.enums.BlockingPolicyModelIpAddressRestriction.ALLOW
                    )
            )
        );
    }
}

System.out.println(new SampleStack().yaml());  // Generate Template

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2Guard.Model.Namespace(
            stack: this,
            name: "namespace-0001",
            blockingPolicy: new Gs2Cdk.Gs2Guard.Model.BlockingPolicyModel(
                passServices: new string[]
                {
                    "account"
                },
                defaultRestriction: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelDefaultRestriction.Deny,
                locationDetection: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelLocationDetection.Disable,
                anonymousIpDetection: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelAnonymousIpDetection.Disable,
                hostingProviderIpDetection: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelHostingProviderIpDetection.Disable,
                reputationIpDetection: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelReputationIpDetection.Disable,
                ipAddressesDetection: Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelIpAddressesDetection.Enable,
                options: new Gs2Cdk.Gs2Guard.Model.Options.BlockingPolicyModelOptions
                {
                    ipAddresses = new string[]
                    {
                        "192.168.0.0/24"
                    },
                    ipAddressRestriction = Gs2Cdk.Gs2Guard.Model.Enums.BlockingPolicyModelIpAddressRestriction.Allow
                }
            )
        );
    }
}

Debug.Log(new SampleStack().Yaml());  // Generate Template

import core from "@/gs2cdk/core";
import guard from "@/gs2cdk/guard";

class SampleStack extends core.Stack
{
    public constructor() {
        super();
        new guard.model.Namespace(
            this,
            "namespace-0001",
            new guard.model.BlockingPolicyModel(
                [
                    "account",
                ],
                guard.model.BlockingPolicyModelDefaultRestriction.DENY,
                guard.model.BlockingPolicyModelLocationDetection.DISABLE,
                guard.model.BlockingPolicyModelAnonymousIpDetection.DISABLE,
                guard.model.BlockingPolicyModelHostingProviderIpDetection.DISABLE,
                guard.model.BlockingPolicyModelReputationIpDetection.DISABLE,
                guard.model.BlockingPolicyModelIpAddressesDetection.ENABLE,
                {
                    ipAddresses:
                    [
                        "192.168.0.0/24",
                    ],
                    ipAddressRestriction:
                    guard.model.BlockingPolicyModelIpAddressRestriction.ALLOW
                }
            )
        );
    }
}

console.log(new SampleStack().yaml());  // Generate Template

from gs2_cdk import Stack, core, guard

class SampleStack(Stack):

    def __init__(self):
        super().__init__()
        guard.Namespace(
            stack=self,
            name='namespace-0001',
            blocking_policy=guard.BlockingPolicyModel(
            pass_services=[
                'account',
            ],
            default_restriction=guard.BlockingPolicyModelDefaultRestriction.DENY,
            location_detection=guard.BlockingPolicyModelLocationDetection.DISABLE,
            anonymous_ip_detection=guard.BlockingPolicyModelAnonymousIpDetection.DISABLE,
            hosting_provider_ip_detection=guard.BlockingPolicyModelHostingProviderIpDetection.DISABLE,
            reputation_ip_detection=guard.BlockingPolicyModelReputationIpDetection.DISABLE,
            ip_addresses_detection=guard.BlockingPolicyModelIpAddressesDetection.ENABLE,
            options=guard.BlockingPolicyModelOptions(
                ip_addresses=[
                    '192.168.0.0/24',
                ],
                ip_address_restriction=guard.BlockingPolicyModelIpAddressRestriction.ALLOW,
            )
        ),
        )

print(SampleStack().yaml())  # Generate Template

BlockingPolicyModel

Blocking Policy

Defines the comprehensive access control rules for a GS2-Guard namespace. Combines multiple security layers including service-level access control, geo-restriction by country, anonymous IP detection (Tor/proxy), hosting provider IP detection (VPN/rental servers), IP reputation filtering, and custom IP address allow/deny lists.

Type

Condition

Required

Default

Value Limits

Description

passServices

List<string>

✓

1 ~ 100 items

List of Accessible GS2 Services

The list of GS2 services that clients are allowed to access through this guard namespace. Only services included in this list will be protected by the blocking policy. At least one service must be specified.

defaultRestriction

String Enum
enum {
“Allow”,
“Deny”
}

“Allow”

Default Restriction

The default action applied to requests that do not match any of the configured detection rules. “Allow” permits all unmatched traffic (blocklist approach), while “Deny” blocks all unmatched traffic (allowlist approach).

Definition	Description
“Allow”	Allow access that does not match the conditions
“Deny”	Deny access that does not match the conditions

locationDetection

String Enum
enum {
“Enable”,
“Disable”
}

“Disable”

Location Detection

Enables or disables geo-restriction based on the client’s country of origin. When enabled, access is filtered by country. The specific countries and the allow/deny behavior are configured via the locations and locationRestriction fields.

Definition	Description
“Enable”	Enable
“Disable”	Disable

locations

List<string>

{locationDetection} == “Enable”

[]

1 ~ 100 items

List of Countries to Detect Access

The list of countries used for geo-restriction filtering. Each country is specified using ISO 3166-1 alpha-2 country codes. Whether these countries are allowed or denied is determined by the locationRestriction setting. Only effective when locationDetection is enabled.

* Applicable only if locationDetection is “Enable”

locationRestriction

String Enum
enum {
“Allow”,
“Deny”
}

{locationDetection} == “Enable”

✓*

Location Restriction Action

The action to take when a request originates from a country in the locations list. “Allow” permits access only from listed countries (allowlist), while “Deny” blocks access from listed countries (blocklist). Works in conjunction with locationDetection and the locations list.

Definition	Description
“Allow”	Allow access
“Deny”	Deny access

* Required if locationDetection is “Enable”

anonymousIpDetection

String Enum
enum {
“Enable”,
“Disable”
}

“Disable”

Anonymous IP Service Detection

Enables or disables detection of access from anonymous IP services such as Tor exit nodes and public proxies. When enabled, requests from these sources are identified and evaluated.

Definition	Description
“Enable”	Enable
“Disable”	Disable

anonymousIpRestriction

String Enum
enum {
“Deny”
}

{anonymousIpDetection} == “Enable”

“Deny”

Anonymous IP Restriction Action

The action to take when access from an anonymous IP service (Tor/public proxy) is detected. Currently only supports “Deny” to block such access. Only effective when anonymousIpDetection is enabled.

Definition	Description
“Deny”	Deny

* Applicable only if anonymousIpDetection is “Enable”

hostingProviderIpDetection

String Enum
enum {
“Enable”,
“Disable”
}

“Disable”

Hosting Provider IP Detection

Enables or disables detection of access from hosting provider IP addresses such as public VPN services and rental servers. When enabled, traffic originating from cloud infrastructure or hosting services rather than end-user devices is identified and evaluated.

Definition	Description
“Enable”	Enable
“Disable”	Disable

hostingProviderIpRestriction

String Enum
enum {
“Deny”
}

{hostingProviderIpDetection} == “Enable”

“Deny”

Hosting Provider IP Restriction Action

The action to take when access from a hosting provider IP (public VPN/rental server) is detected. Currently only supports “Deny” to block such access. Only effective when hostingProviderIpDetection is enabled.

Definition	Description
“Deny”	Deny

* Applicable only if hostingProviderIpDetection is “Enable”

reputationIpDetection

String Enum
enum {
“Enable”,
“Disable”
}

“Disable”

Reputation IP Detection

Enables or disables detection of access from IP addresses with a known bad reputation. When enabled, IPs associated with bots, DDoS attacks, and other malicious activities are identified and evaluated.

Definition	Description
“Enable”	Enable
“Disable”	Disable

reputationIpRestriction

String Enum
enum {
“Deny”
}

{reputationIpDetection} == “Enable”

“Deny”

Reputation IP Restriction Action

The action to take when access from an IP with a bad reputation is detected. Currently only supports “Deny” to block such access. Only effective when reputationIpDetection is enabled.

Definition	Description
“Deny”	Deny

* Applicable only if reputationIpDetection is “Enable”

ipAddressesDetection

String Enum
enum {
“Enable”,
“Disable”
}

“Disable”

IP Address Detection

Enables or disables custom IP address-based access filtering. When enabled, requests are evaluated against the custom IP address list specified in the ipAddresses field. The allow/deny behavior is controlled by ipAddressRestriction.

Definition	Description
“Enable”	Enable
“Disable”	Disable

ipAddresses

List<string>

{ipAddressesDetection} == “Enable”

0 ~ 100 items

List of IP Address Ranges

A list of IP address ranges in CIDR notation used for custom IP-based access filtering. Each incoming request’s source IP is evaluated against these ranges. Whether matching IPs are allowed or denied is controlled by ipAddressRestriction. Only effective when ipAddressesDetection is enabled.

* Applicable only if ipAddressesDetection is “Enable”

ipAddressRestriction

String Enum
enum {
“Allow”,
“Deny”
}

{ipAddressesDetection} == “Enable”

✓*

IP Address Restriction Action

The action to take when a request’s source IP matches the custom IP address list. “Allow” permits access only from listed IPs (allowlist), while “Deny” blocks access from listed IPs (blocklist). Only effective when ipAddressesDetection is enabled.

Definition	Description
“Allow”	Allow access
“Deny”	Deny access

* Required if ipAddressesDetection is “Enable”