標題: CentOS 8 如何關閉firewalld 並打開iptables [打印本頁] 作者: woff 時間: 2022-12-11 18:58 標題: CentOS 8 如何關閉firewalld 並打開iptables 停止及關閉firewalld
1. To begin with, you should disable Firewalld and make sure it does not start at boot again.
systemctl stop firewalld
systemctl disable firewalld
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2. Masking the firewalld service creates a symlink from /etc/systemd/system/firewalld.service to /dev/null thus disabling the firewalld service.
systemctl mask firewalld
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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.
yum install iptables-services
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2. Start and enable the iptables service to be enabled at boot automatically.
systemctl start iptables
systemctl enable iptables
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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.
iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ssh
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
target prot opt source destination
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
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清除規則
Clearing leftover firewalld rules
1. If needed you can clear iptables rules left over from firewalld with the following commands.
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X
service iptables save
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2. Post running the above commands you would get an empty iptable rules as shown below.