iptables防火墙规则设置
iptables -A INPUT -s 源ip地址 -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP
rhel6 查看开机自启动
chkconfig --list
启动、关闭,设置开启自启动
service iptables start
service iptables stop
chkconfig --level 2345 iptables on
rhel7防火墙查看开机自启动
systemctl list-unit-files | grep iptables
启动、关闭,设置开启自启动
systemctl start iptables
systemctl stop iptables
systemctl enable iptables