Which port in Tableau cannot be modified?

In Tableau Server, port 443 is designated for secure HTTP communication (HTTPS). It is the default port used for encrypted data transfer between the Tableau Server and client applications, which is crucial for maintaining the confidentiality and integrity of data. This port is standardized for secure web traffic, similar to how port 80 is used for unencrypted web traffic (HTTP).

The ability to modify ports often depends on specific configurations and the necessity of certain standard protocols. Port 443, as a widely recognized standard for HTTPS, is typically integrated into systems in a way that makes it impractical to change without compromising secure connectivity and functionality. Thus, Tableau maintains the use of port 443 as a fixed point for secure operations, ensuring a consistent and reliable connection for users accessing Tableau Server.

Other ports mentioned—80 (HTTP), 8080 (alternative HTTP), and 5432 (PostgreSQL)—are configurable in Tableau Server to meet varying network requirements and can be changed based on the deployment context and preferences of the organization using Tableau.