Find out the open ports in an instance
Below command will list out ports which are already defined in the linux machine: $ semanage port -l | grep http_port_t http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000 pegasus_http_port_t tcp 5988 If you wish to add a new port to the list, run the below command: $ semanage port -l | grep http_port_t -p tcp 7001 http_port_t tcp 7001, 80, 81, 443, 488, 8008, 8009, 8443, 9000 pegasus_http_port_t tcp 5988 Check if firewall rules are enabled: $ service iptables status Table: filter Chain INPUT (policy ACCEPT) num target prot opt source destination 1 DROP tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 2 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 Chain FORWARD (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination If you wish