See the solution below in Explanation.
Explanation:
Solution:
* Open the firewall port and HTTP service:
firewall-cmd --permanent --add-port=82/tcp
firewall-cmd --permanent --add-service=http
firewall-cmd --reload
* Add SELinux port labeling:
semanage port -a -t http_port_t -p tcp 82
Detailed Explanation:
* firewall-cmd --permanent makes the change persistent.
* --add-port=82/tcp opens the custom TCP port.
* --add-service=http keeps standard HTTP allowed too.
* SELinux blocks services on unexpected ports unless the port is labeled correctly.
* http_port_t tells SELinux that port 82 is valid for web services.