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configuring-identity-aware-proxy-with-google-iap

Configure Google Cloud IAP to enforce per-request identity verification for GCP applications and TCP services.

954|172|Updated Mar 13, 2026
Search Tags:#GCP#gcloud#Zero Trust#Access Control#identity-aware proxy#context-aware access#google iap
One-click install
npx skills add https://github.com/xalgord/xalgorix --skill configuring-identity-aware-proxy-with-google-iap
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: configuring-identity-aware-proxy-with-google-iap
Source: https://github.com/xalgord/xalgorix/tree/main/internal/tools/skills/data/zero-trust-architecture/configuring-identity-aware-proxy-with-google-iap
Command: npx skills add https://github.com/xalgord/xalgorix --skill configuring-identity-aware-proxy-with-google-iap

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires google-auth, requests.

What problem does it solve?

Internal GCP applications are often protected only by VPNs and firewall rules, leaving backends reachable directly and granting excessive network-level access. This Skill guides the configuration of Google Cloud Identity-Aware Proxy so every request to Compute Engine, App Engine, Cloud Run, and GKE services is authenticated and authorized per user and device context.

Core Features & Use Cases

  • IAP Enablement Across Platforms: Enable IAP on backend services, App Engine, Cloud Run, and set up IAP TCP tunneling for SSH/RDP access without public IPs.
  • Context-Aware Access Policies: Create Access Context Manager access levels based on device posture, IP ranges, and geography, then bind them to IAM conditions.
  • Session and Programmatic Access: Configure re-authentication policies per application and service-account-based programmatic access to IAP-protected endpoints.
  • Use Case: A company running 15 internal services on GKE and Cloud Run replaces VPN-based protection with IAP, mapping Google Groups to services, enforcing managed-device access levels on admin tools, and alerting on denied access via Cloud Audit Logs.

Quick Start

Configure Google Cloud IAP for my Cloud Run service with an access level requiring managed corporate devices and audit logging enabled.

Frequently Asked Questions about configuring-identity-aware-proxy-with-google-iap

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I enable Identity-Aware Proxy on a GCP backend service?▼

Enable IAP with gcloud compute backend-services update using the --iap=enabled flag along with your OAuth client ID and secret. You must first create an OAuth consent screen and OAuth client, and the application must sit behind an HTTPS load balancer.

How to configure context-aware access with Google IAP access levels?▼

Create access levels in Access Context Manager defining device posture, IP subnetworks, or regions, then attach them to IAM bindings using a condition expression like request.auth.access_levels.exists. Without the condition, IAP authenticates identity but skips device and network checks.

Can Google IAP protect Cloud Run and App Engine services?▼

Yes, IAP supports Cloud Run, App Engine, Compute Engine, and GKE. For Cloud Run, grant the IAP service account the run.invoker role first, then enable IAP on the backend service fronting the Cloud Run service.

Why can users bypass Google IAP and reach my backend directly?▼

IAP only protects traffic arriving through the HTTPS load balancer. If instances have public IPs or firewall rules allow the app port from 0.0.0.0/0, attackers reach the origin directly; restrict ingress to the IAP range 35.235.240.0/20 and remove public IPs.

How do service accounts access IAP-protected resources programmatically?▼

Use google-auth to create an AuthorizedSession with the IAP OAuth client ID as the target audience, then send requests through that session. This works with service account keys or workload identity for service-to-service calls.

When should I not use Google Identity-Aware Proxy?▼

Avoid IAP for non-HTTP applications that cannot sit behind an HTTPS load balancer, public-facing applications needing unauthenticated access, or apps with their own authentication that would conflict with the IAP flow.

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