To add an exception to firewall
In RedHat/CentOS 6
1 2 3 4 5 | iptables --line -vnL iptables -A INPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -p tcp -s 192.168.0.0/16 -j ACCEPT iptables -D INPUT -p tcp -s 192.168.0.0/16 -j ACCEPT service iptables save |
In RedHat/CentOS 7
1 2 3 4 5 6 | firewall-cmd --list-all firewall-cmd --permanent --add-port=80/tcp firewall-cmd --permanent --zone=public --add-source=192.168.0.0/16 firewall-cmd --permanent --zone=public --remove-source=192.168.0.0/16 firewall-cmd --reload systemctl disable firewalld |