查看目前系統上的 Firewall Rule
# iptables -L INPUT -n
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all — 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
ACCEPT all — 0.0.0.0/0 0.0.0.0/0
INPUT_direct all — 0.0.0.0/0 0.0.0.0/0
INPUT_ZONES_SOURCE all — 0.0.0.0/0 0.0.0.0/0
INPUT_ZONES all — 0.0.0.0/0 0.0.0.0/0
ACCEPT icmp — 0.0.0.0/0 0.0.0.0/0
REJECT all — 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
因為預設的防火牆規則很難修改並處理，所以想先關閉預設的 Firewall Rules
[@more@]
關閉 Firewall
# systemctl stop firewalld
預設不啟動 Firewall
# systemctl disable firewalld
rm ‘/etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service’
rm ‘/etc/systemd/system/basic.target.wants/firewalld.service’
之後就可以使用 Scripts 的方式來設定要使用的 Firewall Rules