not able to setup tomcat 7 to use port 8443

[masber masber]

Dear tomcat community,

I am trying to setup tomcat 7.0.69.0 on port 8443 but for some reason no 
service is listening that port after tomcat is rebooted.

I uncommented the following part in server.xml


    <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol"

               maxThreads="150" SSLEnabled="true" scheme="https" secure="true"

               clientAuth="false" sslProtocol="TLS" />

And then just rebooted tomcat but sudo ss -nolpt | grep 8443 shows nothing

what am I doing wrong?