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Configure AWS Verified Access to provide VPN-less zero trust network access to internal applications using identity and device posture verification with Cedar policy language. Use when configureing aws verified access to provide vpn-less zero trust network.
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| name | configuring-aws-verified-access-for-ztna |
| description | Configure AWS Verified Access to provide VPN-less zero trust network access to internal applications using identity and device posture verification with Cedar policy language. Use when configureing aws verified access to provide vpn-less zero trust network. |
| domain | cybersecurity |
| subdomain | zero-trust-architecture |
| tags | ["zero-trust","aws","verified-access","ztna","cedar-policy","vpn-less","identity-verification","device-posture","aws-ram"] |
| version | 1.0 |
| author | oyi77 |
| license | Apache-2.0 |
| nist_csf | ["PR.AA-01","PR.AA-05","PR.IR-01","GV.PO-01"] |
AWS Verified Access is a Zero Trust Network Access (ZTNA) service that provides secure, VPN-less access to corporate applications hosted in AWS. It evaluates each access request in real-time against granular conditional access policies written in the Cedar policy language, ensuring access is granted per-application only when specific security requirements such as user identity and device security posture are met and maintained. Verified Access integrates with AWS IAM Identity Center, third-party identity providers (Okta, CrowdStrike, JumpCloud, Jamf), and device management solutions. For multi-account deployments, AWS Resource Access Manager (RAM) enables sharing Verified Access groups across organizational units.
Trigger phrases:
"configuring aws verified access for ztna"
"Configure AWS Verified Access to provide VPN-less zero trust network access to i"
When deploying or configuring configuring aws verified access for ztna capabilities in your environment
When establishing security controls aligned to compliance requirements
When building or improving security architecture for this domain
When conducting security assessments that require this implementation
End User (Browser)
|
| HTTPS
v
+------+--------+
| Verified |
| Access |
| Endpoint |
| (Public DNS) |
+------+--------+
|
+------+--------+
| Verified | <-- Cedar Access Policies
| Access | <-- Identity Provider Signals
| Instance | <-- Device Trust Signals
| (Policy |
| Evaluation) |
+------+--------+
|
+------+--------+
| Verified |
| Access Group |
| (App Group) |
+------+--------+
|
+------+--------+
| Internal ALB |
| or ENI Target |
+------+--------+
|
+------+--------+
| Application |
| (Private VPC) |
+--------------+
This section covers core components for configuring aws verified access for ztna.
The regional entity that evaluates access requests against policies.
# Create Verified Access Instance via AWS CLI
aws ec2 create-verified-access-instance \
--description "Production Zero Trust Instance" \
--tag-specifications 'ResourceType=verified-access-instance,Tags=[{Key=Environment,Value=production}]'
# Create identity trust provider
aws ec2 create-verified-access-trust-provider \
--trust-provider-type user \
--user-trust-provider-type iam-identity-center \
--policy-reference-name "idc" \
--description "IAM Identity Center trust provider" \
--tag-specifications 'ResourceType=verified-access-trust-provider,Tags=[{Key=Type,Value=identity}]'
aws ec2 create-verified-access-trust-provider \
--trust-provider-type user \
--user-trust-provider-type oidc \
--oidc-options '{
"Issuer": "https://company.okta.com/oauth2/default",
"AuthorizationEndpoint": "https://company.okta.com/oauth2/default/v1/authorize",
"TokenEndpoint": "https://company.okta.com/oauth2/default/v1/token",
"UserInfoEndpoint": "https://company.okta.com/oauth2/default/v1/userinfo",
"ClientId": "0oa1234567890",
"ClientSecret": "client-secret-here",
"Scope": "openid profile groups"
}' \
--policy-reference-name "okta" \
--description "Okta OIDC trust provider"
aws ec2 create-verified-access-trust-provider \
--trust-provider-type device \
--device-trust-provider-type crowdstrike \
--device-options '{
"TenantId": "crowdstrike-tenant-id",
"PublicSigningKeyUrl": "https://api.crowdstrike.com/zero-trust/v2/certificates"
}' \
--policy-reference-name "crowdstrike" \
--description "CrowdStrike device trust provider"
# Attach identity provider
aws ec2 attach-verified-access-trust-provider \
--verified-access-instance-id vai-0123456789abcdef \
--verified-access-trust-provider-id vatp-0123456789abcdef
# Attach device provider
aws ec2 attach-verified-access-trust-provider \
--verified-access-instance-id vai-0123456789abcdef \
--verified-access-trust-provider-id vatp-device123456
# Create a group for web applications
aws ec2 create-verified-access-group \
--verified-access-instance-id vai-0123456789abcdef \
--description "Production Web Applications" \
--policy-document 'permit(principal, action, resource)
when {
context.okta.groups.contains("production-access") &&
context.crowdstrike.assessment.overall > 50
};' \
--tag-specifications 'ResourceType=verified-access-group,Tags=[{Key=Tier,Value=web}]'
# Create endpoint for ALB-backed application
aws ec2 create-verified-access-endpoint \
--verified-access-group-id vag-0123456789abcdef \
--endpoint-type load-balancer \
--attachment-type vpc \
--domain-certificate-arn arn:aws:acm:us-east-1:123456789012:certificate/xxxx \
--application-domain app.internal.company.com \
--endpoint-domain-prefix myapp \
--load-balancer-options '{
"LoadBalancerArn": "arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/internal-alb/xxxx",
"Port": 443,
"Protocol": "https",
"SubnetIds": ["subnet-abc123", "subnet-def456"]
}' \
--security-group-ids sg-0123456789abcdef \
--description "Internal HR Application"
This section covers cedar policy language for configuring aws verified access for ztna.
// Allow access for users in the engineering group with compliant devices
permit(principal, action, resource)
when {
context.okta.groups.contains("engineering") &&
context.crowdstrike.assessment.overall > 70 &&
context.crowdstrike.assessment.sensor_config.status == "active"
};
// Deny access from unmanaged devices
forbid(principal, action, resource)
when {
!context.crowdstrike.assessment.sensor_config.status == "active"
};
// Time-based access - only during business hours (UTC)
permit(principal, action, resource)
when {
context.okta.groups.contains("contractors") &&
context.http_request.http_method == "GET" &&
context.crowdstrike.assessment.overall > 80
};
// Restrict admin access to specific user group with high device trust
permit(principal, action, resource)
when {
context.idc.groups.contains("admins") &&
context.crowdstrike.assessment.overall > 90 &&
context.crowdstrike.assessment.os_version.startswith("Windows 11") ||
context.crowdstrike.assessment.os_version.startswith("macOS 14")
};
// Allow read-only access for lower trust levels
permit(principal, action, resource)
when {
context.okta.groups.contains("read-only") &&
context.crowdstrike.assessment.overall > 30 &&
context.http_request.http_method == "GET"
};
// Group-level policy (applies to all endpoints in the group)
// Set on the Verified Access Group
permit(principal, action, resource)
when {
context.okta.groups.contains("employees") &&
context.crowdstrike.assessment.overall > 50
};
// Endpoint-level policy (additional restrictions for specific app)
// Set on the Verified Access Endpoint
permit(principal, action, resource)
when {
context.okta.groups.contains("hr-team") &&
context.okta.email.endsWith("@company.com")
};
terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 5.0"
}
}
}
# Verified Access Instance
resource "aws_verifiedaccess_instance" "main" {
description = "Production Zero Trust Access"
tags = {
Environment = "production"
}
}
# Identity Trust Provider (OIDC)
resource "aws_verifiedaccess_trust_provider" "okta" {
policy_reference_name = "okta"
trust_provider_type = "user"
user_trust_provider_type = "oidc"
description = "Okta identity provider"
oidc_options {
authorization_endpoint = "https://company.okta.com/oauth2/default/v1/authorize"
client_id = var.okta_client_id
client_secret = var.okta_client_secret
issuer = "https://company.okta.com/oauth2/default"
scope = "openid profile groups"
token_endpoint = "https://company.okta.com/oauth2/default/v1/token"
user_info_endpoint = "https://company.okta.com/oauth2/default/v1/userinfo"
}
}
# Device Trust Provider (CrowdStrike)
resource "aws_verifiedaccess_trust_provider" "crowdstrike" {
policy_reference_name = "crowdstrike"
trust_provider_type = "device"
device_trust_provider_type = "crowdstrike"
description = "CrowdStrike device trust"
device_options {
tenant_id = var.crowdstrike_tenant_id
}
}
# Attach providers to instance
resource "aws_verifiedaccess_instance_trust_provider_attachment" "okta" {
verifiedaccess_instance_id = aws_verifiedaccess_instance.main.id
verifiedaccess_trust_provider_id = aws_verifiedaccess_trust_provider.okta.id
}
resource "aws_verifiedaccess_instance_trust_provider_attachment" "crowdstrike" {
verifiedaccess_instance_id = aws_verifiedaccess_instance.main.id
verifiedaccess_trust_provider_id = aws_verifiedaccess_trust_provider.crowdstrike.id
}
# Verified Access Group
resource "aws_verifiedaccess_group" "web_apps" {
verifiedaccess_instance_id = aws_verifiedaccess_instance.main.id
description = "Production Web Applications"
policy_document = <<-CEDAR
permit(principal, action, resource)
when {
context.okta.groups.contains("production-access") &&
context.crowdstrike.assessment.overall > 50
};
CEDAR
tags = {
Tier = "web"
}
}
# Verified Access Endpoint
resource "aws_verifiedaccess_endpoint" "internal_app" {
verified_access_group_id = aws_verifiedaccess_group.web_apps.id
endpoint_type = "load-balancer"
attachment_type = "vpc"
domain_certificate_arn = aws_acm_certificate.app.arn
application_domain = "app.internal.company.com"
endpoint_domain_prefix = "myapp"
description = "Internal Application"
load_balancer_options {
load_balancer_arn = aws_lb.internal.arn
port = 443
protocol = "https"
subnet_ids = var.private_subnet_ids
}
security_group_ids = [aws_security_group.verified_access.id]
policy_document = <<-CEDAR
permit(principal, action, resource)
when {
context.okta.groups.contains("app-users")
};
CEDAR
}
# Logging configuration
resource "aws_verifiedaccess_instance_logging_configuration" "main" {
verifiedaccess_instance_id = aws_verifiedaccess_instance.main.id
access_logs {
cloudwatch_logs {
enabled = true
log_group = aws_cloudwatch_log_group.verified_access.name
}
s3 {
enabled = true
bucket_name = aws_s3_bucket.access_logs.id
prefix = "verified-access/"
}
}
}
resource "aws_cloudwatch_log_group" "verified_access" {
name = "/aws/verified-access/production"
retention_in_days = 90
}
# Share Verified Access Group across accounts via RAM
resource "aws_ram_resource_share" "verified_access" {
name = "verified-access-share"
allow_external_principals = false
}
resource "aws_ram_resource_association" "group_share" {
resource_arn = aws_verifiedaccess_group.web_apps.verified_access_group_arn
resource_share_arn = aws_ram_resource_share.verified_access.arn
}
resource "aws_ram_principal_association" "workload_ou" {
principal = "arn:aws:organizations::123456789012:ou/o-xxxx/ou-xxxx-xxxxxxxx"
resource_share_arn = aws_ram_resource_share.verified_access.arn
}
# Query access logs in CloudWatch
aws logs filter-log-events \
--log-group-name /aws/verified-access/production \
--filter-pattern '{ $.status_code = "403" }' \
--start-time $(date -d '1 hour ago' +%s000)
# CloudWatch alarm for access denials
aws cloudwatch put-metric-alarm \
--alarm-name "VerifiedAccess-HighDenialRate" \
--metric-name "AccessDenied" \
--namespace "AWS/VerifiedAccess" \
--statistic Sum \
--period 300 \
--threshold 100 \
--comparison-operator GreaterThanThreshold \
--evaluation-periods 2 \
--alarm-actions arn:aws:sns:us-east-1:123456789012:security-alerts
| Rationalization | Reality |
|---|---|
| "We are too small to be targeted" | Automated attacks target everyone. Size does not matter. |
| "Security slows us down" | A breach slows you down 100x more. Build security in from the start. |
| "We will fix it after launch" | Vulnerabilities in production are exploited within hours. Fix before deploy. |