While working with linux os, We need to open some kinds of port like for Apache tomcat ssl application server, Use the following command for the same.
Step 1: Allow the Port 8443
You need to execute the given command to allow port 80 using UFW utility.
sudo ufw allow 8443
Step 2: Get UFW firewall Status
Now we need to check and verify the open port by using the given command.
sudo ufw status