It's possible to show Service Status of FireWall like follows. (enabled by default)
â— firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled) Active: active (running) since Thu 2015-03-31 19:36:27 JST; 2s ago Main PID: 1308 (firewalld) CGroup: /system.slice/firewalld.service â””â”€1308 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid ..... .....
If you use FireWall service, it needs to modify settings of it because
incoming requests for services are mostly not allowed by default.
 If FireWall service does not need for you because of some reasons like that some FireWall Machines are running in your Local Netowrk or others, it's possbile to stop and disable it like follows.
[root@higuys ~]#systemctl stop firewalld
It's possible to show Status of SELinux (Security-Enhanced Linux) like follows. (enabled by default)
Enforcing # SELinux is enabled
If SELinux function does not need for you because of some reasons like
that your server is running only in Local safety Network or others,
it's possbile to disable it like follows
# This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=<span class="color1">disabled</span> <span class="color2"># change to disabled</span> # SELINUXTYPE= can take one of these two values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted