# Communication ports Tenant Broker and Tenants communicate with each other using the following ports: * Tenant Connection Broker > Tenant Broker Connection Broker: port 20003 * Tenant Broker Gateway > Tenant Broker Connection Broker: port 20002 * Tenant Broker Gateway > Tenant Connection Broker: port 20002 * Tenant Broker Gateway > Servers hosting published resources: port 3389 These are standard RAS ports, which are also described in the **Port reference** section. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.parallels.com/landing/ras-admin-guide/parallels-ras-21-administrators-guide/ras-multi-tenant-architecture/communication-ports.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.