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 (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