Apereo CAS 6.1.6 and Tomcat 9 servlet container - HTTPS 302 responses

[Florent A.]

Hello !

I have a problem with CAS 6.1.6 and Tomcat 9 (JDK11).
The servlet container responds correctly (/manager), but as soon as it is called in HTTPS via a Load Balancer, Tomcat (/cas, /manager is ok) returns 302 responses.
The problem seems the same as https://github.com/apereo/cas/pull/4784, except that it happens on an external servlet container.

Do you know if I need to add something special in the configuration?

# Remove embedded Tomcat
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration

# General
cas.server.name=<HTTPS URL>
cas.server.prefix=${cas.server.name}/cas
cas.sso.allowMissingServiceParameter=false

#JDBC, Thymeleaf, Encryption, Ticket ST & TGT configuration
[...]

Thanks