Internet-Security.com TCP port 4022 details

TCP port 4022 is commonly used by Microsoft SQL Server Service Broker for its Service Broker endpoint, enabling inter-instance messaging between SQL Server installations. Many real-world deployments (e.g., multi-server SQL Server applications on-premises or in Azure VMs) configure the endpoint at TCP://hostname:4022 and open this port in firewalls to allow Service Broker dialogs and routes. This applies across SQL Server editions (Express, Standard, Enterprise) when Service Broker is utilized.

TCP 4022