While I was setting up Wazuh, I needed to change the default web interface port that the software ran on so I could set up a reverse proxy. To do this, I edited the following configuration file.
nano /etc/kibana/kibana.yml
And changed the following setting from
server.host: 0.0.0.0
elasticsearch.hosts: https://127.0.0.1:9200
server.port: 443
...
To this
server.host: 0.0.0.0
elasticsearch.hosts: https://127.0.0.1:9200
server.port: 8443
...
And now port 443 is open for my reverse proxy to use and Wazuh is now running on port 8443.