Spring security 401 Unauthorized on unsecured endpoint

Spring Boot was not applying the configuration because couldn't find it. On Application.java config package was not included with @ComponentScan anotation.

After some researching, here is solution:

@SpringBootApplication(exclude = {SecurityAutoConfiguration.class })
@ComponentScan(basePackages = { PackageConstants.PACKAGE_CONTROLLERS_REST, PackageConstants.PACKAGE_SERVICES,
        PackageConstants.PACKAGE_SERVICES_IMPL, PackageConstants.PACKAGE_MONGO_REPOSITORIES,
        PackageConstants.PACKAGE_MONGO_REPOSITORIES_IMPL, PackageConstants.PACKAGE_UTILS })
public class Application {

    // Clase principal que se ejecuta en el bootrun

    public static void main(String[] args) {

        SpringApplication.run(Application.class, args);
    }
}

Main line is @SpringBootApplication(exclude = {SecurityAutoConfiguration.class }) it tells not use Spring Boot Security AutoConfiguration configuration. It is not full answer, because now you have to tell Spring user your Spring Security configuration class. Also i advice you to create Initializer class with init Root Config Classes, ApplicationConfiguration using and refuse to use SpringBoot applications. Something like this:

ApplicationConfig:

@Configuration
@EnableWebMvc
@ComponentScan("com.trueport.*")
@PropertySource("classpath:app.properties")
public class ApplicationConfig extends WebMvcConfigurerAdapter {
    ....
}

ApplicationSecurityConfig:

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class ApplicationSecurityConfig extends WebSecurityConfigurerAdapter {
    ....
}

Initializer:

public class Initializer implements WebApplicationInitializer {

    private static final String DISPATCHER_SERVLET_NAME = "dispatcher";

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ....
        DispatcherServlet dispatcherServlet = new DispatcherServlet(ctx);
        dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
        ctx.register(ApplicationConfig.class);
        ServletRegistration.Dynamic servlet =     servletContext.addServlet(DISPATCHER_SERVLET_NAME,
            dispatcherServlet);
        servlet.addMapping("/");
        servlet.setLoadOnStartup(1);
        servlet.setAsyncSupported(true);
    }
}