Google Cloud Secure Access Connect Tutorial: Architecture, Pricing, Use Cases, and Hands-On Guide for Networking

1. Introduction

Secure Access Connect is a Google Cloud Networking capability used to provide secure, policy-based access from users (or services) to private applications and internal resources without placing those resources directly on the public internet and without relying on traditional, broad network-level VPN access.

In simple terms: Secure Access Connect helps you publish internal applications (web apps, admin UIs, APIs, and similar “private endpoints”) to authorized users using Zero Trust principles—authenticate the user, evaluate context and policy, then grant the minimum required access.

Technically, Secure Access Connect is commonly associated with Google Cloud’s BeyondCorp approach (Google’s Zero Trust model). A typical design uses a Google-managed control plane plus connectors/gateways in your private network that create outbound-only connections to Google. Users access applications through Google’s edge, and traffic is authorized and logged based on identity and policy.

It solves a very practical problem: teams need to let employees, partners, and operators reach internal systems (often hosted in VPCs or on-prem) while reducing lateral movement risk, eliminating inbound firewall exposure, and improving auditing compared to “VPN everyone into the network”.

Naming note (important): Google Cloud documentation frequently uses BeyondCorp terminology (for example, “BeyondCorp Enterprise” and “connectors/gateways”). Some organizations and materials refer to the capability as Secure Access Connect. Verify the current product naming and console placement in official documentation before implementing in production, because Google Cloud security and networking portfolios evolve and UI locations may change.

2. What is Secure Access Connect?

Secure Access Connect’s official purpose (in practical Google Cloud terms) is to enable secure, identity-aware access to private applications by combining:

Identity-based access control (who the user/service is)
Context-aware policy (device posture, location, group membership, risk signals—depending on your setup)
Outbound-only connectivity from private environments (so you avoid inbound exposure)
Centralized auditing and governance

Core capabilities

Provide Zero Trust Network Access (ZTNA) patterns for private application access.
Reduce or eliminate reliance on:
inbound firewall rules to application subnets
public IPs on internal services
“flat” VPN access that gives broad network reachability
Centralize access policy, logging, and auditing.

Major components (as typically implemented on Google Cloud)

Depending on the exact Secure Access Connect packaging you have, the solution usually involves some combination of:

Identity provider (IdP): commonly Cloud Identity or Google Workspace (and/or federation to another IdP).
Policy and context:
IAM roles and permissions
Access Context Manager (BeyondCorp-style context-aware access, where applicable)
Access plane:
A Google-managed access layer where users authenticate and are authorized
Private connectivity plane:
Connectors or gateways deployed in a VPC or on-prem environment that establish outbound connections to Google
Application definitions:
Objects describing what private apps exist, where they live, and who may access them

Service type

Secure Access Connect is best thought of as a managed secure access / ZTNA connectivity pattern in Google Cloud, not a single VM or a single load balancer feature.

Scope (global/regional/project/org)

In most Zero Trust designs on Google Cloud:

Identity and policy are often organization-scoped (Cloud Identity / Workspace, IAM, Access Context Manager).
Connectors/gateways are typically deployed in a project and attached to one or more VPCs/subnets (regional resources depending on where deployed).
Applications are project resources or linked to network endpoints in specific regions.

Because the precise resource model depends on the exact Secure Access Connect implementation you use, verify the resource hierarchy (org/project/region) in the official docs for your edition and APIs.

How it fits into the Google Cloud ecosystem

Secure Access Connect fits into Google Cloud Networking and Security by complementing:

Cloud VPN / Cloud Interconnect (site-to-site connectivity)
Identity-Aware Proxy (IAP) (identity-aware access to web apps/VMs; sometimes used as an entry-level BeyondCorp pattern)
BeyondCorp Enterprise (Google’s enterprise ZTNA portfolio)
Cloud Load Balancing and private service exposure patterns
Cloud Logging / Cloud Monitoring for auditing and operations

3. Why use Secure Access Connect?

Business reasons

Reduce the blast radius of compromised credentials by enforcing least-privilege access to specific apps instead of whole networks.
Support remote and hybrid work without expanding your “internal network perimeter” to every laptop.
Improve auditability for compliance programs (who accessed what, when, from where).

Technical reasons

Avoid inbound NAT / public IP exposure of private applications.
Enforce identity and policy before a TCP/HTTP session reaches the app.
Support segmented access: users get access to app A but not subnet B.

Operational reasons

Centralized access control and logging reduces “snowflake” firewall/VPN rules.
Easier offboarding: disable an identity, revoke group membership, or update policy.
Potentially reduces VPN capacity planning and VPN client troubleshooting.

Security/compliance reasons

Aligns with Zero Trust principles: “never trust, always verify”.
Improves detection/forensics by producing consistent access logs.
Enables tighter controls for sensitive admin systems.

Scalability/performance reasons

Shifts access enforcement to Google-managed edge/control plane (scales operationally).
Outbound-only connectors are often easier to deploy across multiple environments.

When teams should choose it

Choose Secure Access Connect when:

You have internal apps (web/admin/tools) that must remain private.
You need to grant access to contractors or partners without VPNing them into your network.
You need auditable, identity-based access with centralized policy.
You’re modernizing away from “network = trust” patterns.

When they should not choose it

Secure Access Connect is usually not the first choice when:

You need site-to-site connectivity between networks for machine-to-machine traffic (use Cloud VPN/Interconnect).
You need to expose a public consumer-facing service (use standard load balancing + WAF/Cloud Armor).
Your application is not compatible with the supported access patterns (for example, unusual protocols) and you can’t adapt it.
You require a purely self-managed open-source ZTNA stack and cannot use a managed control plane.

4. Where is Secure Access Connect used?

Industries

Finance and fintech (admin access to internal tools with strong audit requirements)
Healthcare (restricted access to PHI-adjacent internal apps)
Retail (corporate tools and vendor portals)
Manufacturing (plant networks + centralized secure access to OT-adjacent dashboards)
SaaS providers (secure internal admin portals)
Government/education (controlled access to internal systems)

Team types

Platform engineering teams standardizing access
Security engineering teams implementing Zero Trust
SRE/operations teams controlling production access
DevOps teams enabling secure developer tooling
Network teams migrating from VPN-centric patterns

Workloads

Internal web apps (admin consoles, dashboards)
CI/CD systems (e.g., internal Git, artifact repos, deploy consoles)
Jump-host replacements
Private APIs and internal portals
Bastion-less VM administration patterns (where applicable)

Architectures

Single VPC with segmented subnets
Shared VPC across multiple projects
Hybrid with on-prem and Google Cloud
Multi-region private apps with geo proximity needs

Production vs dev/test usage

Dev/test: excellent for proving identity-based access and removing public ingress from test tools.
Production: strong fit for regulated access paths, privileged admin workflows, and partner access—provided you design for HA connectors/gateways and adopt strong IAM/policy controls.

5. Top Use Cases and Scenarios

Below are realistic scenarios where Secure Access Connect patterns are commonly applied.

1) Replace a broad VPN with app-level access

Problem: VPN grants users network reachability to many subnets; a single compromised laptop can scan internal ranges.
Why it fits: Secure Access Connect grants access to specific applications based on identity and policy.
Example: Contractors can access an internal Jira instance but cannot reach database subnets.

2) Secure access to internal admin dashboards

Problem: Admin dashboards are often internal-only but accessed by remote SREs.
Why it fits: Central policy, strong authentication, detailed logs.
Example: SREs can access Grafana/Prometheus UIs without exposing them via public IP.

3) Partner/vendor access to a private portal

Problem: Vendors need access, but you don’t want to extend your network perimeter to external companies.
Why it fits: Identity-based access with controlled scope and auditing.
Example: Third-party logistics provider gets access to a private inventory portal.

4) Access to GKE private services (through approved entry points)

Problem: Services run on private clusters and aren’t reachable from the internet.
Why it fits: You can front internal services through controlled access layers.
Example: Developers access a private internal API gateway endpoint without opening firewall ingress.

5) Secure “break-glass” access path for incidents

Problem: Emergency access must be available but tightly controlled and monitored.
Why it fits: Strong policy + logging; can require extra conditions (MFA, device posture).
Example: On-call engineers use a break-glass group to access a prod admin UI for 1 hour.

6) Access to on-prem apps without inbound firewall rules

Problem: On-prem security teams disallow inbound connections; VPN is painful.
Why it fits: Outbound-only connectors can establish secure connectivity.
Example: HR system remains on-prem; employees access it through secure access policies.

7) Reduce public exposure of legacy apps

Problem: Legacy apps can’t be easily secured for internet exposure.
Why it fits: App stays private; access is proxied and authorized.
Example: A legacy internal web app with weak auth is shielded behind identity-aware access.

8) Centralize access logging for compliance

Problem: Logs are fragmented across VPN, NAT gateways, and app logs.
Why it fits: Access events can be centralized in Cloud Logging and correlated with identity.
Example: Compliance requires proof of who accessed “finance-admin” and when.

9) Enforce device-based access policies (where supported)

Problem: Password-only access is insufficient; unmanaged devices are risky.
Why it fits: Context-aware conditions can restrict access to managed devices.
Example: Only corporate-managed devices can reach the internal payroll portal.

10) Segment access for different engineering teams

Problem: Multiple teams share VPCs and internal tools; access boundaries are unclear.
Why it fits: Define per-app policies and group-based entitlements.
Example: Data team can access an internal notebook service; app team cannot.

11) Secure access for internal APIs used by humans (not just service-to-service)

Problem: Engineers call internal APIs from laptops for debugging.
Why it fits: Identity-aware access for human-in-the-loop workflows.
Example: Engineers access a private “debug API” endpoint only during business hours.

12) Reduce bastion host sprawl

Problem: Teams create many bastion VMs; patching and key management become a risk.
Why it fits: ZTNA patterns can reduce reliance on persistent bastions.
Example: Admin access is granted through identity-aware paths rather than SSH-ing into bastions (implementation depends on supported protocols).

6. Core Features

Because Secure Access Connect is closely tied to Zero Trust access patterns, its “features” are best described as capabilities in the solution.

Identity-aware access enforcement

What it does: Ensures access is granted based on authenticated identity (user/group).
Why it matters: Replaces “anyone on the VPN/subnet can reach it”.
Practical benefit: Faster offboarding and fewer static network allowlists.
Caveats: Requires clean identity lifecycle management and group governance.

Context-/policy-based authorization (BeyondCorp-style)

What it does: Adds conditions beyond identity (context, device, attributes—depending on setup).
Why it matters: Reduces risk of credential theft and unmanaged endpoints.
Practical benefit: Allow managed corporate devices, deny unknown devices.
Caveats: The exact posture signals available depend on your identity/device management stack. Verify in official docs for your environment.

Outbound-only connector/gateway connectivity

What it does: Connectors in private networks initiate outbound connections to the access plane.
Why it matters: Avoids opening inbound firewall holes.
Practical benefit: Easier security approvals for on-prem integrations.
Caveats: Requires careful sizing/HA design for connectors; connectors must reach Google endpoints.

Application-centric access model

What it does: Access is granted per application (or per defined resource), not per subnet.
Why it matters: Minimizes lateral movement.
Practical benefit: Contractors can access exactly one internal app.
Caveats: You must invest in app inventory and consistent naming/ownership.

Centralized logging and auditing

What it does: Produces access logs that include identity context and policy outcomes.
Why it matters: Supports incident response and compliance.
Practical benefit: Investigate “who accessed prod-admin last night”.
Caveats: Ensure logs are retained and protected; consider SIEM export.

Integration with Google Cloud IAM and org policies

What it does: Uses Google Cloud’s governance model for permissions and administration.
Why it matters: Aligns with existing GCP controls and audit trails.
Practical benefit: Separate duties (network admins vs security admins).
Caveats: Misconfigured IAM can overgrant admin or user access.

Support for hybrid environments

What it does: Enables secure access to apps hosted on-prem or in cloud VPCs.
Why it matters: Most enterprises are hybrid.
Practical benefit: Standardize access across environments.
Caveats: Network pathing, DNS, and connector placement are common stumbling blocks.

High availability design options (solution-level)

What it does: You can deploy multiple connectors/gateways and define resilient routing.
Why it matters: Access paths become business-critical.
Practical benefit: Reduce downtime from single connector failure.
Caveats: HA is your responsibility in the private connectivity layer; test failover.

7. Architecture and How It Works

High-level architecture

A typical Secure Access Connect architecture has:

User attempts to access a private application.
User authenticates via an identity provider.
Policy engine evaluates access rules (identity, context).
If allowed, traffic is routed through a secure access plane.
Connector/gateway in the private network forwards traffic to the internal app.
Logs are written for auditing and monitoring.

Request/data/control flow

Control plane
Admin defines apps, policies, and connector/gateway configuration.
IAM controls who can administer resources.
Data plane
End-user traffic flows from user → Google access plane → connector/gateway → private app.
Return traffic follows the same path.
Telemetry
Access logs and audit logs flow to Cloud Logging/Audit Logs.
Metrics may be available for connector health and request rates (depends on implementation—verify in official docs).

Integrations with related services

Common integrations include:

Cloud Identity / Google Workspace: identities, groups, MFA
Access Context Manager: context-aware access controls (BeyondCorp patterns)
Cloud Logging / Cloud Monitoring: audit + operations
VPC: where the applications live
Cloud DNS: name resolution for private apps
Load Balancing / Cloud Armor: if you front apps with L7 load balancers (varies by pattern)

Dependency services

Secure Access Connect solutions often depend on:

Identity services (Cloud Identity/Workspace or federated IdP)
VPC networking and routing
Firewall rules (internal allow) between connector and app
Private DNS
Google Cloud APIs enabled for the chosen BeyondCorp/secure access components

Security/authentication model

Authentication is identity-based (user principal).
Authorization uses:
IAM for administrative control
Per-app access policy for end-user access (often group-based)
Optional context signals (device posture, IP ranges, etc.)

Networking model

Private apps remain on RFC1918 ranges in VPC or on-prem.
Connectors/gateways typically:
reside in the same network environment as the apps
require outbound egress to Google endpoints (often over 443)
require internal access to the private app endpoints (firewall allow rules)

Monitoring/logging/governance considerations

Enable and export:
Cloud Audit Logs for admin actions
Access logs for user/app access attempts
Create dashboards for:
connector health
error rates (401/403/5xx)
latency to private app endpoints
Use organization policies and least privilege IAM for administration.

Simple architecture diagram

flowchart LR
  U[User Device] -->|Authenticate + Request| G[Google-managed Access Plane]
  G -->|Authorized traffic| C[Secure Access Connect<br/>Connector/Gateway]
  C -->|Internal traffic| A[Private Application<br/>(VPC or On-prem)]
  G --> L[Cloud Logging/Audit Logs]

Production-style architecture diagram

flowchart TB
  subgraph Identity[Identity & Policy]
    IDP[Cloud Identity / Workspace<br/>or Federated IdP]
    ACM[Access Context Manager<br/>(Context-Aware Policy)]
  end

  subgraph GoogleEdge[Google-managed Access Plane]
    AP[Access Proxy / Secure Access Frontend]
    LOG[Cloud Logging + Audit Logs]
    MON[Cloud Monitoring]
  end

  subgraph CustomerNet[Customer Private Network]
    subgraph VPC1[Google Cloud VPC]
      CONN1[Connector/Gateway A]
      CONN2[Connector/Gateway B]
      APP1[Private App 1]
      APP2[Private App 2]
    end
    subgraph OnPrem[On-Prem Network]
      CONN3[Connector/Gateway C]
      APP3[Private App 3]
    end
  end

  U[Users] --> AP
  AP --> IDP
  AP --> ACM
  AP --> CONN1
  AP --> CONN2
  AP --> CONN3
  CONN1 --> APP1
  CONN2 --> APP2
  CONN3 --> APP3
  AP --> LOG
  AP --> MON
  CONN1 --> MON
  CONN2 --> MON
  CONN3 --> MON

8. Prerequisites

Because Secure Access Connect is typically part of a Zero Trust access solution, prerequisites span identity, networking, and permissions.

Google Cloud account/project requirements

A Google Cloud project with billing enabled
An organization (recommended for enterprise policy controls) if you need org-wide identity/policy management

Permissions / IAM roles

You typically need:

Project-level ability to:
enable APIs
create/modify network resources
deploy compute resources (if deploying connectors as VMs)
Security admin permissions to:
manage access policies and app definitions
Logging/monitoring permissions to:
view logs and metrics

Exact roles vary by implementation and API (BeyondCorp/IAP/etc.). Verify required roles in official docs for Secure Access Connect / BeyondCorp components you are using.

Billing requirements

Billing account attached to the project.
Expect costs from:
connector/gateway compute (if VM-based)
load balancers (if used)
network egress
logging ingestion/retention
product licensing/subscription if BeyondCorp Enterprise edition is required

Tools needed

Google Cloud Console access
gcloud CLI (recommended)
Install: https://cloud.google.com/sdk/docs/install
(Optional) Terraform for IaC, if your organization standardizes on it

Region availability

Connector/gateway placement will be region-specific (where you deploy it).
The access plane is Google-managed and often global in nature, but availability and supported regions depend on the exact Secure Access Connect implementation. Verify in official docs.

Quotas/limits

Plan for:

Compute quotas (CPU, VM instances) if deploying connectors as VMs
API quotas for access/auth events
Logging quotas and retention policies
Any per-connector or per-app limits (verify in official docs)

Prerequisite services

Depending on your chosen implementation approach, you may need:

Cloud Identity/Workspace or federated SSO
Access Context Manager (for context-aware policies)
Cloud Logging and Cloud Monitoring enabled (typically default)
VPC networking set up for the private applications

9. Pricing / Cost

Secure Access Connect cost is usually a combination of:

Product licensing/subscription (if delivered as part of BeyondCorp Enterprise or other secure access suites)
Google Cloud infrastructure costs for components you run (connectors/gateways as VMs, load balancers, NAT, etc.)
Network and telemetry costs (egress, logging)

Because packaging and SKUs can change, do not assume a single line-item price. Confirm current pricing for your edition and region.

Pricing dimensions (typical)

Per-user licensing (common in ZTNA/SSE offerings), potentially by tier/edition
Verify BeyondCorp Enterprise pricing if Secure Access Connect is bundled there.
Per-connector/gateway infrastructure:
VM instance costs (vCPU, RAM)
persistent disk
managed instance group (if used for HA)
Network costs:
egress from connector/gateway to Google endpoints (if billed)
inter-region traffic (if connectors/apps span regions)
Logging:
log ingestion volume and retention/export (BigQuery/SIEM)

Free tier

Google Cloud free tier usually covers some basic services, but ZTNA/BeyondCorp licensing is not typically “free tier”. Even if the control plane is licensed, you can often keep infrastructure costs low in a lab by using small VMs and minimizing log retention. Verify.

Key cost drivers

Number of users who need access (licensing)
Number of private apps onboarded (operational overhead; sometimes licensing)
Connector sizing and HA (2+ connectors per environment is common)
Logging volume (especially if you log every request and keep long retention)
Network egress (especially hybrid/on-prem paths)

Hidden or indirect costs

Operations: maintaining connector upgrades, monitoring, incident response
Identity governance: group management, access reviews
Device management: if you enforce device posture, you may need MDM/endpoint management tooling
SIEM: exporting logs to BigQuery or third-party SIEM can add costs

Network/data transfer implications

Keep connectors close to applications to avoid unnecessary cross-region charges.
Be mindful of:
cross-region VPC traffic
egress to the internet if connectors rely on NAT
on-prem connectivity costs if using VPN/Interconnect

How to optimize cost

Start with a small pilot:
limited set of apps (1–3)
one user group
minimal logging retention for dev
Use right-sized connectors:
scale out only when needed
Centralize and sample logs if appropriate (while maintaining compliance)
Prefer private connectivity patterns that reduce unnecessary egress

Example low-cost starter estimate (model, not numbers)

A minimal lab often includes:

1 small VM running a connector/gateway (plus disk)
1 private VM running a demo web app
Basic Logging/Monitoring

Add licensing if required (commonly per user). Since actual SKUs vary, use:

Pricing page: verify in official docs
Google Cloud Pricing Calculator: https://cloud.google.com/products/calculator

Example production cost considerations

For production, budget for:

At least 2 connectors per environment (HA)
Multi-region connectors if apps are regional
More robust logging retention and SIEM export
Dedicated project(s) for security connectivity components
Potential enterprise licensing based on user counts and feature tier

Official pricing references to check (start here): – Google Cloud Pricing overview: https://cloud.google.com/pricing – Google Cloud Pricing Calculator: https://cloud.google.com/products/calculator – BeyondCorp Enterprise documentation/pricing pages (verify current links in official docs): https://cloud.google.com/beyondcorp-enterprise

10. Step-by-Step Hands-On Tutorial

This lab is designed to be practical and low-cost while teaching the core Secure Access Connect model: keep an app private, deploy a connector/gateway path, and grant identity-based access.

Because Secure Access Connect is closely tied to BeyondCorp/BeyondCorp Enterprise and Google Cloud’s evolving security portfolio, the exact console menus, required APIs, and resource names can change. The steps below focus on an executable workflow pattern, and each step includes an official-doc verification link so you can confirm the current UI and requirements.

Objective

Deploy a private web application on a Compute Engine VM (no public IP), then configure Secure Access Connect-style access so only authorized identities can reach it, with centralized logging.

Lab Overview

You will:

Create a VPC and a private VM running a simple HTTP service.
Deploy a connector/gateway component in the same network (implementation depends on your Secure Access Connect packaging).
Define an application connection and access policy for a test user/group.
Validate access and review logs.
Clean up resources to avoid ongoing charges.

Step 1: Create a dedicated project (recommended) and set variables

In the Google Cloud Console, create a new project (or reuse a sandbox project).
Ensure billing is enabled.

In Cloud Shell, set variables:

export PROJECT_ID="YOUR_PROJECT_ID"
export REGION="us-central1"
export ZONE="us-central1-a"

gcloud config set project "$PROJECT_ID"
gcloud config set compute/region "$REGION"
gcloud config set compute/zone "$ZONE"

Expected outcome: gcloud config list shows your project/region/zone.

Verification:

gcloud config list

Step 2: Enable required APIs (baseline)

Enable common APIs needed for networking, VMs, and logging. Secure Access Connect/BeyondCorp APIs vary—enable those once confirmed in official docs for your specific setup.

gcloud services enable \
  compute.googleapis.com \
  logging.googleapis.com \
  monitoring.googleapis.com \
  cloudresourcemanager.googleapis.com \
  iam.googleapis.com

If your Secure Access Connect implementation is delivered through BeyondCorp-related APIs, locate the “Enable API” instructions in the official documentation and enable the appropriate APIs.

BeyondCorp Enterprise docs hub (verify current setup steps): https://cloud.google.com/beyondcorp-enterprise/docs

Expected outcome: APIs show as enabled.

Verification:

gcloud services list --enabled --format="value(config.name)" | sort

Step 3: Create a VPC and subnet for private apps

Create a dedicated VPC and subnet:

gcloud compute networks create sac-vpc --subnet-mode=custom

gcloud compute networks subnets create sac-subnet \
  --network=sac-vpc \
  --range=10.10.0.0/24 \
  --region="$REGION"

Add firewall rules to allow internal traffic within the subnet and allow health checks if needed later (keep it minimal for now):

gcloud compute firewall-rules create sac-allow-internal \
  --network=sac-vpc \
  --allow=tcp,udp,icmp \
  --source-ranges=10.10.0.0/24

Expected outcome: VPC and subnet exist.

Verification:

gcloud compute networks describe sac-vpc
gcloud compute networks subnets describe sac-subnet --region "$REGION"

Step 4: Deploy a private VM running a demo web app (no public IP)

Create a VM with no external IP and install NGINX to serve a simple page.

gcloud compute instances create private-web-1 \
  --subnet=sac-subnet \
  --no-address \
  --machine-type=e2-micro \
  --image-family=debian-12 \
  --image-project=debian-cloud \
  --tags=private-web

Connect to it via Cloud Shell using IAP-based SSH (this is for admin setup; it does not publish the web app publicly):

gcloud compute ssh private-web-1 --tunnel-through-iap

On the VM:

sudo apt-get update
sudo apt-get install -y nginx
echo "Secure Access Connect lab app: $(hostname)" | sudo tee /var/www/html/index.html
sudo systemctl enable --now nginx

Exit SSH.

Add a firewall rule allowing HTTP only from within the subnet (so it stays private):

gcloud compute firewall-rules create sac-allow-http-internal \
  --network=sac-vpc \
  --allow=tcp:80 \
  --source-ranges=10.10.0.0/24 \
  --target-tags=private-web

Expected outcome: The app is reachable only from inside the VPC subnet.

Verification (from Cloud Shell, create a temporary test VM in same subnet and curl it):

gcloud compute instances create curl-vm \
  --subnet=sac-subnet \
  --no-address \
  --machine-type=e2-micro \
  --image-family=debian-12 \
  --image-project=debian-cloud

gcloud compute ssh curl-vm --tunnel-through-iap --command \
  "curl -s http://10.10.0.2/ || true"

Note: The private VM IP might not be 10.10.0.2. Get it:

gcloud compute instances describe private-web-1 \
  --format="get(networkInterfaces[0].networkIP)"

Then curl using that IP.

Step 5: Deploy Secure Access Connect connector/gateway (pattern)

This is the step that differs the most depending on your Secure Access Connect packaging:

Some Google Cloud Zero Trust patterns use BeyondCorp Enterprise connectors/gateways.
Some environments use Identity-Aware Proxy (IAP) for web apps/VM access as an entry-level identity-aware access method.
Some enterprises use a managed secure access product that provides a dedicated connector VM/image.

Do this:

Go to the official Secure Access Connect / BeyondCorp Enterprise documentation for “connector” or “gateway” deployment.
Deploy the connector/gateway in the same VPC/subnet (or in a dedicated “security tools” subnet with routes to the app subnet).
Ensure the connector has: – outbound internet egress to Google endpoints (often via Cloud NAT if no external IP) – firewall access to the private web VM on TCP/80

Start here and follow the official “set up connectors” guide (verify current steps): – https://cloud.google.com/beyondcorp-enterprise/docs

Expected outcome: A connector/gateway registers as healthy/ready in the Google Cloud Console and can reach the private app.

Practical tip: In production, deploy at least two connectors per environment (different zones) for HA.

Step 6: Define the private application connection and access policy

Once the connector/gateway is deployed:

Define an “application” that points to the private VM endpoint (IP:80 or internal DNS name).
Create an access policy binding (commonly group-based) that allows only your test user/group.

Because the exact UI and resource names vary (and change over time), follow the official “create an app connection / publish an app” steps: – BeyondCorp Enterprise docs hub: https://cloud.google.com/beyondcorp-enterprise/docs

Expected outcome: Your app appears in the secure access portal/list (or is reachable via a managed URL) for authorized users only.

Step 7: Validate end-user access

From a browser session authenticated as the allowed user:

Access the app via the secure access entry point (portal URL or protected app URL, depending on your setup).
Confirm you can see the NGINX page content.

Then test as a user not in the allowed group:

Confirm access is denied (expected 403/denied screen).

Expected outcome: Authorized users can access; unauthorized users cannot.

Validation

Use these checks:

Connector health: Confirm connector/gateway shows healthy in the console for your chosen product.
App reachability: Confirm the private endpoint is reachable via the secure access entry point.
Logging: – Check Cloud Logging for access events and denied events.

In Cloud Console:

Logging → Logs Explorer
Filter by relevant resource type/service based on your deployed secure access components. Because log names differ, start broad:
Time range: last 30 minutes
Query: search for your app name, connector name, or user principal email

Expected outcome: You see access attempts, including denied attempts.

Troubleshooting

Common issues and fixes:

Connector can’t reach the app – Symptom: connector shows unhealthy or app tests fail – Fix:
- confirm routes between connector subnet and app subnet
- confirm firewall rule allows connector → app on TCP/80
- confirm app is listening on 0.0.0.0:80 (sudo ss -lntp | grep :80)
No outbound connectivity for connector – Symptom: connector cannot register / cannot reach Google endpoints – Fix:
- if connector has no public IP, configure Cloud NAT for its subnet
- ensure DNS resolution and firewall allow egress to required endpoints (verify endpoints in official docs)
Access policy denies expected users – Symptom: authorized user is denied – Fix:
- confirm group membership in IdP
- confirm policy bindings include the correct group
- confirm user is authenticating with the intended identity
Logs not visible – Symptom: you can access the app but see no logs – Fix:
- confirm you have Logging Viewer permissions
- confirm audit/access logs are enabled for the relevant services
- broaden Logs Explorer query and verify time range

Cleanup

To avoid charges, delete the VMs and firewall rules created in this lab:

gcloud compute instances delete -q private-web-1 curl-vm
gcloud compute firewall-rules delete -q sac-allow-internal sac-allow-http-internal
gcloud compute networks subnets delete -q sac-subnet --region "$REGION"
gcloud compute networks delete -q sac-vpc

Also delete any connector/gateway resources created by Secure Access Connect setup (follow the product’s cleanup steps in the official docs), and consider deleting the whole project if it was dedicated to this lab.

11. Best Practices

Architecture best practices

Design for HA:
deploy at least two connectors/gateways per environment
use multiple zones where possible
Segment by environment:
separate dev/test/prod connectors and policies
avoid sharing the same connector fleet across highly different risk zones
Keep apps private by default:
no public IPs for internal apps
least privilege firewall rules (connector → app only)

IAM/security best practices

Use groups for access grants; avoid direct user bindings.
Separate admin roles:
connector administrators
policy administrators
app owners who can request access but not grant it
Enforce MFA and strong auth at the IdP.

Cost best practices

Right-size connector/gateway instances based on observed throughput and concurrency.
Start with a pilot and scale gradually.
Control logging retention:
dev: shorter retention
prod: retention aligned to compliance
Minimize cross-region traffic (place connectors near apps).

Performance best practices

Keep connector-to-app latency low (same region, same VPC where possible).
Use internal DNS names and stable endpoints rather than hard-coded IPs.
Monitor p95/p99 latency and error rates from the access layer.

Reliability best practices

Use managed instance groups for connector VMs if supported by your design.
Run regular failover tests (disable one connector and confirm access continues).
Maintain documented runbooks for connector outages and policy mistakes.

Operations best practices

Standardize:
naming conventions (sac-<env>-<region>-connector-01)
labeling (env=prod, owner=security, costcenter=...)
Create alerting for:
connector health/heartbeat failures
spikes in denied access events
unusual access geographies (if available)
Integrate with ticketing/approvals for access requests.

Governance/tagging/naming best practices

Use consistent labels on connector/gateway compute resources:
env, app, owner, data_classification
Document app ownership and access approval workflow.
Run periodic access reviews (quarterly is common).

12. Security Considerations

Identity and access model

Use a centralized IdP (Cloud Identity/Workspace or federated SSO).
Prefer group-based authorization.
Use least privilege:
users get access only to specific apps
admins have minimal permissions needed to manage connectors/policies

Encryption

Expect TLS for:
user → Google access plane
connector/gateway → Google endpoints
For connector/gateway → app traffic inside the VPC:
prefer TLS where possible, especially for sensitive apps
if app cannot do TLS, restrict network path strictly and plan modernization

Network exposure

Keep private apps on private IPs only.
Avoid wide firewall rules like 0.0.0.0/0 to internal apps.
Control egress from connector/gateway subnets; allow only required destinations.

Secrets handling

Avoid embedding credentials in connector VMs.
Use Secret Manager for app secrets (if apps need them).
Rotate keys/certs per policy.

Audit/logging

Enable and protect:
Admin audit logs (who changed policies/connectors/apps)
Access logs (who accessed what)
Export logs to:
BigQuery for long-term analysis
SIEM for detection
Restrict log access (logs can contain sensitive identifiers).

Compliance considerations

Secure Access Connect patterns help with:

Least privilege access controls
Central audit trails
Reduced network exposure

But compliance still requires:

access reviews
data classification
incident response processes
device management controls (where required)

Common security mistakes

Treating Secure Access Connect like a “VPN replacement” but still granting broad access.
Using overly broad groups (“all employees”) for sensitive apps.
Running a single connector with no HA.
Not monitoring denied events (often an early indicator of credential abuse or misconfig).

Secure deployment recommendations

Use separate projects for:
connectors/gateways
production apps
logging/SIEM exports
Use organization policies to restrict who can create public IPs or modify firewall rules.
Implement a change management process for access policy updates.

13. Limitations and Gotchas

Because Secure Access Connect is tightly tied to identity, policy, and connectivity components, common issues include:

Product/feature availability varies by edition and may require specific licensing (verify in official docs).
UI and resource naming changes can break runbooks; always pin to current docs.
Protocol limitations: ZTNA products often support web and certain TCP patterns more easily than arbitrary protocols. Validate your app protocols early.
DNS complexity:
private DNS zones
split-horizon naming
ensuring user-friendly access URLs
Connector egress requirements:
no egress = no registration/operation
Cloud NAT may be required for private connector VMs
Throughput planning:
under-sized connectors lead to latency and timeouts
Logging volume surprises:
per-request logging can be expensive at scale
Hybrid path stability:
on-prem firewall/proxy policies can interrupt outbound tunnels
Access policy mistakes:
a single misconfigured rule can block critical operator access; keep break-glass procedures.

14. Comparison with Alternatives

Secure Access Connect sits in the “secure private access / ZTNA” space. Here are common alternatives and complements.

Option	Best For	Strengths	Weaknesses	When to Choose
Secure Access Connect (Google Cloud)	Identity-aware access to private apps with Google-managed access plane	Zero Trust model, centralized policy/logging, reduces inbound exposure	Requires careful setup; may require licensing; connector operations	When you want app-level access control instead of network-level VPN
Identity-Aware Proxy (IAP) (Google Cloud)	Protecting web apps and VM admin access with identity	Strong integration with Google identity/IAM, simpler entry point for some use cases	Not a full ZTNA suite for every protocol; architecture constraints	When you want identity-aware access for specific GCP-hosted apps/VMs and your use case fits IAP patterns
Cloud VPN / Cloud Interconnect (Google Cloud)	Site-to-site connectivity and network extension	Great for network-to-network traffic; predictable architecture	Network-level trust; lateral movement risk if not segmented	When workloads require network connectivity (machine-to-machine) rather than user-to-app access
Cloudflare Access / Zero Trust	Internet-edge ZTNA for apps across clouds	Fast rollout, strong edge network	External dependency; integration choices vary	When you want a vendor-agnostic edge ZTNA across multiple environments
Zscaler ZPA	Enterprise ZTNA at scale	Mature enterprise ZTNA capabilities	Licensing and operational model differs	When you are standardizing on Zscaler for private access
AWS Verified Access	Private app access within AWS	AWS-native ZTNA patterns	AWS-centric	When most apps are in AWS and you want AWS-native approach
Microsoft Entra Private Access	Private access in Microsoft ecosystem	Tight integration with Microsoft identity	Microsoft-centric	When identity and management are centered on Microsoft stack
Self-managed bastion + SSH + VPN	Small environments, legacy	Familiar, direct control	High ops burden; weaker auditing; broad access	When constraints require self-managed, but expect security/ops tradeoffs

15. Real-World Example

Enterprise example (regulated company)

Problem: A financial services company has internal admin portals and reporting apps in Google Cloud and on-prem. VPN access grants broad subnet reachability and creates audit gaps.
Proposed architecture:
Secure Access Connect model with connectors in:
- a dedicated GCP project/VPC (for cloud apps)
- on-prem (for legacy apps)
Identity via Google Workspace with MFA
Group-based access policies per application
Centralized Cloud Logging export to SIEM
Two connectors per environment for HA
Why Secure Access Connect was chosen:
App-level access replaces “VPN into the network”
Outbound-only connectivity meets on-prem firewall constraints
Central auditing supports compliance
Expected outcomes:
Reduced lateral movement risk
Faster access provisioning/deprovisioning through groups
Better forensics and compliance reporting

Startup/small-team example

Problem: A startup runs internal tools (Grafana, Argo CD, internal admin UI) in a private VPC. Engineers want remote access without exposing these tools publicly.
Proposed architecture:
Single environment connector/gateway (then expand to HA)
Identity-based access for a small engineering group
Minimal logging retention initially, with later SIEM adoption
Why Secure Access Connect was chosen:
Keeps internal tools private
Avoids managing a VPN client rollout
Simplifies offboarding and incident access logging
Expected outcomes:
Internal tools remain non-public
Reduced operational overhead compared to maintaining bastions/VPN
Clear audit trail for privileged tool access

16. FAQ

Is Secure Access Connect the same as a VPN?
No. A VPN typically provides network-level access (subnets/routes). Secure Access Connect is generally an app-level, identity-aware access pattern (Zero Trust) that reduces lateral movement.
Do private apps need public IPs?
Typically no. A key goal is to keep apps on private IPs and avoid inbound exposure.
Does it work with on-prem applications?
Often yes, using outbound-only connectors/gateways in the on-prem network. Verify supported deployment models in official docs.
Does it replace Cloud VPN or Interconnect?
Not always. VPN/Interconnect are still needed for site-to-site and machine-to-machine connectivity. Secure Access Connect is more about user/service access to specific apps.
What identity providers are supported?
Commonly Google Cloud Identity / Workspace, and sometimes federation to external IdPs. Verify for your edition.
Can I restrict access based on device posture?
In BeyondCorp-style models, yes—depending on your device management and policy capabilities. Verify posture signals supported in your environment.
How do I design high availability?
Deploy multiple connectors/gateways across zones/regions, and test failover. The access control plane is managed by Google; your connector layer still needs HA planning.
How do I monitor it?
Monitor connector health, access success/denial rates, and latency. Use Cloud Monitoring and Cloud Logging exports.
What are the biggest operational risks?
Misconfigured policies causing outages, under-sized connectors causing latency, and lack of egress connectivity for connector registration.
Can I use it for SSH/RDP to VMs?
Some secure access products support TCP-based access patterns; others focus on web apps. Verify protocol support in official docs.
How is access logged?
Typically via Cloud Logging and audit logs, capturing identity and policy outcomes. Exact log fields vary by product.
Is data encrypted in transit?
User-to-access-plane is typically TLS; connector tunnels are typically TLS. For connector-to-app, you should prefer TLS if possible.
What does “outbound-only connector” mean?
The connector initiates connections to Google; you don’t open inbound firewall rules from the internet to your private network.
How do I onboard many apps?
Use consistent app inventory and naming, standard policy templates, and automate with IaC where supported. Validate each app’s protocol/DNS needs.
What’s the simplest way to start?
Start with one internal web app in a dev project, one connector, one group-based policy, and basic logging—then expand to HA and production governance.

17. Top Online Resources to Learn Secure Access Connect

Because Secure Access Connect is closely associated with BeyondCorp-style access patterns on Google Cloud, the best starting points are the official BeyondCorp, identity-aware access, and policy documentation hubs.

Resource Type	Name	Why It Is Useful
Official documentation	BeyondCorp Enterprise docs: https://cloud.google.com/beyondcorp-enterprise/docs	Primary reference for Zero Trust access patterns, connectors/gateways, and setup guidance
Official documentation	Google Cloud Identity: https://cloud.google.com/identity	Identity foundation (users, groups, SSO)
Official documentation	Access Context Manager: https://cloud.google.com/access-context-manager/docs	Context-aware access concepts and policy model used in BeyondCorp patterns
Official documentation	Identity-Aware Proxy (IAP): https://cloud.google.com/iap/docs	Common related service for identity-aware access patterns (often used alongside/adjacent)
Official docs (pricing)	Google Cloud Pricing overview: https://cloud.google.com/pricing	Baseline pricing concepts for infra and services
Official tool	Google Cloud Pricing Calculator: https://cloud.google.com/products/calculator	Build region-specific estimates without guessing
Official docs	Cloud Logging: https://cloud.google.com/logging/docs	Logging, retention, exports for access auditing
Official docs	Cloud Monitoring: https://cloud.google.com/monitoring/docs	Metrics, alerting, dashboards for connector/app availability
Official architecture	Google Cloud Architecture Center: https://cloud.google.com/architecture	Reference architectures and security patterns (search for BeyondCorp/Zero Trust)
Official videos	Google Cloud Tech YouTube: https://www.youtube.com/@googlecloudtech	Talks and demos on Google Cloud security and networking patterns
Reputable community	Google Cloud Community: https://www.googlecloudcommunity.com/	Practical Q&A and field lessons (validate against official docs)

18. Training and Certification Providers

Institute	Suitable Audience	Likely Learning Focus	Mode	Website URL
DevOpsSchool.com	DevOps engineers, SREs, platform teams	Google Cloud operations, DevOps tooling, cloud security basics	check website	https://www.devopsschool.com/
ScmGalaxy.com	Beginners to intermediate engineers	DevOps fundamentals, SCM, CI/CD, cloud introductions	check website	https://www.scmgalaxy.com/
CLoudOpsNow.in	Cloud ops and platform teams	Cloud operations, monitoring, reliability practices	check website	https://www.cloudopsnow.in/
SreSchool.com	SREs and operations engineers	SRE practices, incident response, reliability engineering	check website	https://www.sreschool.com/
AiOpsSchool.com	Ops teams adopting AIOps	AIOps concepts, automation, observability	check website	https://www.aiopsschool.com/

19. Top Trainers

Platform/Site	Likely Specialization	Suitable Audience	Website URL
RajeshKumar.xyz	DevOps/cloud training content (verify offerings)	Beginners to practitioners	https://rajeshkumar.xyz/
devopstrainer.in	DevOps training (verify course catalog)	DevOps engineers, SREs	https://devopstrainer.in/
devopsfreelancer.com	Freelance DevOps help/training (verify services)	Teams needing short-term guidance	https://devopsfreelancer.com/
devopssupport.in	DevOps support/training (verify services)	Ops/DevOps teams	https://devopssupport.in/

20. Top Consulting Companies

Company Name	Likely Service Area	Where They May Help	Consulting Use Case Examples	Website URL
cotocus.com	Cloud/DevOps consulting (verify specialties)	Cloud architecture, DevOps processes, migrations	Secure private access rollout planning; logging/monitoring integration; network segmentation reviews	https://cotocus.com/
DevOpsSchool.com	DevOps and cloud consulting/training	Platform enablement, DevOps transformation	Designing connector/gateway HA; IaC standardization; operational runbooks	https://www.devopsschool.com/
DEVOPSCONSULTING.IN	DevOps consulting (verify services)	CI/CD, cloud operations, security practices	Secure access patterns assessment; compliance logging pipeline; cost optimization reviews	https://www.devopsconsulting.in/

21. Career and Learning Roadmap

What to learn before Secure Access Connect

Google Cloud fundamentals – Projects, IAM, billing, org structure
Networking basics – VPCs, subnets, routes, firewall rules – DNS (Cloud DNS, private zones)
Identity fundamentals – Cloud Identity/Workspace groups – IAM roles and service accounts
Security basics – least privilege, audit logging, incident response basics

What to learn after Secure Access Connect

BeyondCorp/Zero Trust architecture in depth (policy design, device posture)
Access Context Manager advanced policies
SIEM integrations (BigQuery exports, threat detection workflows)
Advanced networking:
Cloud VPN/Interconnect design
shared VPC patterns
Terraform automation for consistent rollouts (where supported)

Job roles that use it

Cloud Security Engineer
Security Architect
Network/Security Engineer (cloud)
Platform Engineer
SRE / Production Operations Engineer
DevSecOps Engineer

Certification path (if available)

Google Cloud certifications evolve; common relevant ones include:

Professional Cloud Security Engineer
Professional Cloud Network Engineer
Associate Cloud Engineer (foundational)

Verify current certification details: – https://cloud.google.com/learn/certification

Project ideas for practice

Build a secure access pattern for:
internal Grafana
internal admin API
Implement group-based entitlements and quarterly access reviews.
Create dashboards and alerts for:
denied-access spikes
connector health failures
Run a “break-glass” access drill and document the runbook.

22. Glossary

Zero Trust: Security model that assumes no implicit trust based on network location; requires verification for each access request.
ZTNA (Zero Trust Network Access): Approach to grant access to specific applications/resources based on identity and policy, rather than network-level access.
BeyondCorp: Google’s Zero Trust model and associated enterprise products/patterns.
Connector/Gateway: A component deployed in your private network that provides connectivity to private apps through an outbound-only model (terminology varies).
Access Context Manager: Google Cloud service for defining context-aware access policies.
IAM (Identity and Access Management): Google Cloud’s identity/permission system for controlling who can do what.
Cloud NAT: Managed network address translation for private instances to reach the internet without external IPs.
Cloud Logging: Centralized log storage and analysis in Google Cloud.
Cloud Audit Logs: Logs that record administrative actions and access events for many Google Cloud services.
Least privilege: Security principle of granting only the minimum permissions needed.
Lateral movement: Attacker technique of moving from one compromised system to other systems in the network.

23. Summary

Secure Access Connect (Google Cloud, Networking) is an approach to delivering secure, identity-aware access to private applications using Zero Trust principles—authorize based on identity and policy, keep apps private, and log everything for audit and operations.

It matters because it helps teams reduce reliance on broad VPN access, minimize inbound exposure, and implement cleaner least-privilege access to internal tools and sensitive systems. In Google Cloud ecosystems, it commonly fits alongside BeyondCorp-style patterns, IAM, Access Context Manager, and Cloud Logging/Monitoring.

From a cost perspective, plan for a mix of licensing (if applicable), connector/gateway infrastructure, and logging/network costs. From a security perspective, the biggest wins come from tight group-based policies, strong authentication, HA connector design, and disciplined logging/audit retention.

Use Secure Access Connect when you need app-level secure access for internal resources; choose VPN/Interconnect when you need network-to-network connectivity. Next, deepen your skills by studying BeyondCorp Enterprise patterns and practicing with a pilot app, HA connectors, and production-grade logging/alerting.

rajeshkumar

Category

1. Introduction

2. What is Secure Access Connect?

Core capabilities

Major components (as typically implemented on Google Cloud)

Service type

Scope (global/regional/project/org)

How it fits into the Google Cloud ecosystem

3. Why use Secure Access Connect?

Business reasons

Technical reasons

Operational reasons

Security/compliance reasons

Scalability/performance reasons

When teams should choose it

When they should not choose it

4. Where is Secure Access Connect used?

Industries

Team types

Workloads

Architectures

Production vs dev/test usage

5. Top Use Cases and Scenarios

1) Replace a broad VPN with app-level access

2) Secure access to internal admin dashboards

3) Partner/vendor access to a private portal

4) Access to GKE private services (through approved entry points)

5) Secure “break-glass” access path for incidents

6) Access to on-prem apps without inbound firewall rules

7) Reduce public exposure of legacy apps

8) Centralize access logging for compliance

9) Enforce device-based access policies (where supported)

10) Segment access for different engineering teams

11) Secure access for internal APIs used by humans (not just service-to-service)

12) Reduce bastion host sprawl

6. Core Features

Identity-aware access enforcement

Context-/policy-based authorization (BeyondCorp-style)

Outbound-only connector/gateway connectivity

Application-centric access model

Centralized logging and auditing

Integration with Google Cloud IAM and org policies

Support for hybrid environments

High availability design options (solution-level)

7. Architecture and How It Works

High-level architecture

Request/data/control flow

Integrations with related services

Dependency services

Security/authentication model

Networking model

Monitoring/logging/governance considerations

Simple architecture diagram

Production-style architecture diagram

8. Prerequisites

Google Cloud account/project requirements

Permissions / IAM roles

Billing requirements

Tools needed

Region availability

Quotas/limits

Prerequisite services

9. Pricing / Cost

Pricing dimensions (typical)

Free tier

Key cost drivers

Hidden or indirect costs

Network/data transfer implications

How to optimize cost

Example low-cost starter estimate (model, not numbers)

Example production cost considerations

10. Step-by-Step Hands-On Tutorial

Objective

Lab Overview

Step 1: Create a dedicated project (recommended) and set variables

Step 2: Enable required APIs (baseline)

Step 3: Create a VPC and subnet for private apps

Step 4: Deploy a private VM running a demo web app (no public IP)

Step 5: Deploy Secure Access Connect connector/gateway (pattern)

Step 6: Define the private application connection and access policy