Firewalld on CentOS 7

Configure the Firewalld on Centos7

Need to type the following command (with root privileges):

Start the FireWalld:  systemctl enable firewalld

Stop the FireWalld:  systemctl stop firewalld

Disable the FireWalld: systemctl disable firewalld

Check the Status of the FireWall: systemctl status firewalld

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To check the Red Hat Linux (RH) version

cat /etc/redhat-release

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How to update ELRepo driver for NIC on Centos:

1) rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

2) yum -y install fastestmirror

3) To check version of NIC:

lsmod | grep igb
lsmod | grep e1000
lsmod | grep e1000e

4) Then install the driver ElRepo:

yum -y install kmod-igb

4) reboot