CentOS8防火牆配置

1. 檢視防火牆(firewalld)服務的狀態

# systemctl status firewalld

● firewalld.service - firewalld - dynamic firewall daemon
loaded: loaded (
/usr/lib/systemd/system/firewalld.service; disabled; vendor >
active: inactive (dead)
docs: man:
firewalld(1
)# service firewalld start
redirecting to /bin/systemctl start firewalld.service
# systemctl enable firewalld

systemctl status firewalld    # 檢視firewalld服務狀態

systemctl enable firewalld    # 設定firewalld服務開機啟動
systemctl disable firewalld   # 禁止firewalld服務開機啟動
service firewalld start       # 開啟
service firewalld restart     # 重啟
service firewalld stop        # 關閉

# firewall-cmd --state

running

# 檢視防火牆規則 注意：ssh的22埠預設開啟，且不在該列表中

firewall-cmd --list-all
# 開放某個埠 如80
firewall-cmd --permanent --add-port=
80/tcp
# 開放某個範圍內的埠 如10000
-11000
firewall-cmd --permanent --add-port=
10000
-11000
/tcp
# 移除某個埠 如80
firewall-cmd --permanent --remove-port=
80/tcp
# 移除某個範圍內的埠 如10000
-11000
firewall-cmd --permanent --remove-port=
10000
-11000
/tcp
firewall-cmd --reload

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yum install iptables services 安裝iptables systemctl unmask firewalld 執行命令，即可實現取消服務的鎖定 systemctl mask firewalld 下次需要鎖定該服務時執行 systemctl start firewalld.s...