A) Explanation: * [root@node1 ~]# curl http://node1.domain15.example.com curl: (7) Failed to connect to node1.domain15.example.com port 80: Connection refused [root@node1 ~]# yum install httpd [root@node1 ~]# systemctl enable --now httpd Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service /usr/lib/systemd/system/httpd.service. [root@node1 ~]# systemctl start httpd [root@node1 ~]# systemctl status httpd Status: 'Running, listening on: port 80' * [root@node1 ~]# wget http://node1.domain15.example.com 2021-03-23 13:27:28 ERROR 403: Forbidden. [root@node1 ~]# semanage port -l | grep http http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000 [root@node1 ~]# semanage port -a -t http_port_t -p tcp 82 [root@node1 ~]# semanage port -l | grep http http_port_t tcp 82, 80, 81, 443, 488, 8008, 8009, 8443, 9000 [root@node1 ~]# firewall-cmd --zone=public --list-all [root@node1 ~]# firewall-cmd --permanent --zone=public --add-port=82/tcp [root@node1 ~]# firewall-cmd --reload [root@node1 ~]# curl http://node1.domain15.example.com OK * root@node1 ~]# wget http://node1.domain15.example.com:82 Connection refused. [root@node1 ~]# vim /etc/httpd/conf/httpd.conf Listen 82 [root@node1 ~]# systemctl restart httpd [root@node1 ~]# wget http://node1.domain15.example.com:82 2021-03-23 13:31:41 ERROR 403: Forbidden. [root@node1 ~]# curl http://node1.domain15.example.com:82 OK