Tomcat embeded with AWS Elastic Beanstalk won t listen to port 80

Question

I'm launching a Spring Boot .jar with Embedded Tomcat to an Elastic Beanstalk (Java) instance.

server.port=80 in the configuration file, however EB won't let Tomcat bind to port 80.

What's preventing Tomcat from listening to port 80 and how do I fix it?

Answer 1

You can run your app with sudo as the ec2-user is not allowed to bind to port 80. This is not a good practice obviously for security concerns. Why do you want to listen on port 80? Elastic beanstalk by default will proxy to port 8080