[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-18。"],[],[],null,["# Controlling access to websites and apps\n\nTo secure your web resources in a simple-to-manage, scalable, and granular way,\nGoogle Cloud offers [context-aware access](/context-aware-access/docs/overview)\nvia [Identity-Aware Proxy](/iap) (IAP). IAP is designed to\nenforce the [BeyondCorp](/beyondcorp) security model,\nwhich establishes a zero-trust perimeter on the public internet for secure,\nremote work without the need for a traditional VPN.\n\nYou can allow secure access to your websites or web apps for users located\nanywhere or on any device by using IAP to control granular\nrestrictions. Access control can be configured based on the user's identity and\ncontext of their request without making additional site changes. You can also\ncentrally define and enforce access policies across multiple apps and\nsites, including\n[IAM policies with conditional binding](/iap/docs/cloud-iap-context-aware-access-howto).\nIAP works with other Google Cloud offerings including [App Engine standard environment](/iap/docs/authenticate-users-google-accounts), [Compute Engine](/iap/docs/enabling-compute-howto), and [Google Kubernetes Engine](/iap/docs/enabling-kubernetes-howto).\n\nConfiguring your access levels\n------------------------------\n\nWhen accessing web resources that IAP knows about, users need to log in with their Google identity service credentials (for example, their Gmail or Google Workspace email address) or an LDAP registered with an LDAP directory service that's synchronized with the Google identity service. If the user is authorized, IAP forwards their request to the web server along with header data that includes the user's identity.\n\n**Figure 1.** Controlling user access to web resources behind IAP.\n\nIn the Cloud console, you can configure IAP to simply block\nunauthorized users from accessing a given resource.\n\nTo do so for a resource on App Engine:\n\n1. Open the [Identity-Aware Proxy page](https://console.cloud.google.com/security/iap) in your active project.\n2. Select the resource you want to modify.\n3. Click **Add Principal** and add the email addresses of groups\n or individuals to whom you want to grant the\n **IAP-secured Web App User** role for the project.\n\n The table below lists some common access scenarios and\n the principal to grant access to for each scenario.\n\n4. Click **Add** to save your changes.\n\nNext steps\n----------\n\n- Get started by familiarizing yourself with [IAP concepts](/iap/docs/concepts-overview) and following the [quickstarts](/iap/docs/quickstarts).\n- Learn more by viewing these introductory videos:\n - [BeyondCorp in a bottle](https://www.youtube.com/watch?v=TtmsV-xq0r0)\n - [Centralize access to your organization's websites with Identity-Aware Proxy](https://youtu.be/xM9-FSU5MoY)\n- Check out these tutorials for using IAP with [App Engine standard environment](/iap/docs/authenticate-users-google-accounts), [Compute Engine](/iap/docs/enabling-compute-howto), [Google Kubernetes Engine](/iap/docs/enabling-kubernetes-howto), and [on-premises apps](/iap/docs/enabling-on-prem-howto)."]]
