[[["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):2025-07-30。"],[],[],null,["# Looker outbound port requirements\n\nBy default, Looker tries to connect to specific outbound ports to support various features. Blocking or disabling these connections on customer-hosted instances may prevent full use of the Looker application. To learn more about what tools and services Looker uses and what their outbound port requirements are, see the following table.\n\u003e In addition to those listed on this page, Looker needs ports opened to [communicate with your databases](/looker/docs/connecting-to-your-db). You may also need to open additional ports if you have [migrated your internal configuration to a MySQL database](/looker/docs/migrating-looker-backend-db-to-mysql) or if you have [clustered Looker](/looker/docs/clustering-looker) (so the cluster nodes can communicate with each other).\n\n\\* In-Product (cloud-based) Services\n\nLearn more about Looker's [product security](https://looker.com/product/security#shared) and [privacy policy](https://looker.com/privacy).\n\nNext steps\n----------\n\nAfter you have ensured that Looker can access necessary services, you're ready to [enable secure database access](/looker/docs/enabling-secure-db-access)."]]