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 to add specific port to firewall rules, run below command:
$ iptables -A INPUT -p tcp -m tcp --dport 7001 -j ACCEPT
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