Web servers provide numerous processes, features, and functionalities that use TCP/IP ports. Some of these processes may be deemed unnecessary or too unsecure to run on a production system. The ports that vSphere UI listens on are configured in the 'catalina.properties' file and must be verified as accurate to their shipping state.
Navigate to and open /usr/lib/vmware-vsphere-ui/server/conf/catalina.properties. Navigate to the ports specification section. Set the vSphere UI port specifications according to the shipping configuration below: http.port=5090 proxy.port=443 https.port=5443