參考文章
https://www.thegeekdiary.com/how ... s-in-centos-rhel-7/
終了及封閉firewalld
1. To begin with, you should disable Firewalld and make sure it does not start at boot again.
Created symlink from /etc/systemd/system/firewalld.service to /dev/null.
安裝iptables
Install and configure iptables
1. To enable iptables, first we have to install the “iptables-services” package.
2. Post running the above commands you would get an empty iptable rules as shown below.
排除劃定規矩
Clearing leftover firewalld rules
1. If needed you can clear iptables rules left over from firewalld with the following commands.
2. Masking the firewalld service creates a symlink from /etc/systemd/system/firewalld.service to /dev/null thus disabling the firewalld service.
Check to see if any rules are left behind from firewalld. By default a fresh intall of iptables would have iptables rules as shown below.
2. Start and enable the iptables service to be enabled at boot automatically.
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