How to configure embedded Tomcat integrated with Spring to listen requests to IP address, besides localhost?

In order to specify a which IP you want Tomcat to bind too, I believe you can simply add the following to your application.properties:

server.address=<your_ip>
server.port=<your_port>

Replacing <your_ip> with the IP address you want it to listen on. This, and other basic properties, can be found in the Spring Boot Reference Guide, Appendix A.

The other way to configure the embedded Tomcat is to create a custom configurer in code by implementing the EmbeddedServletContainerCustomizer interface. You can read more about this in the Spring Boot Reference Guide, Section 55.5-55.8.

Simply add in application.properties file:

server.address=0.0.0.0