Firewall-cmd配置端口转发

firewall status

systemctl status firewalld.service

重新加载防火墙

firewall-cmd --reload

Rule List

firewall-cmd --list-all

设置

检查是否允许伪装IP

firewall-cmd --query-masquerade

• firewall-cmd --add-masquerade --permanent
• --add-masquerade  # 允许防火墙伪装IP
• --remove-masquerade# 禁止防火墙伪装IP

永久生效

• --permanent 永久生效，否则重启/reload失效

开放端口

• firewall-cmd --zone=public --add-port=32000-32099/tcp
• firewall-cmd --zone=public --add-port=33000-33099/udp
• firewall-cmd --zone=public --remove-port=32000-32099/tcp

转发

• firewall-cmd --add-forward-port=port=32010:proto=tcp:toport=3389:toaddr=193.122.104.2
• firewall-cmd --remove-forward-port=port=32010:proto=tcp:toport=3389:toaddr=193.122.104.2

批量添加端口映射

## fw.sh
#!/bin/sh

if [ "$1" == "add" ]; then
    OT="add"
elif [ "$1" == "remove" ]; then
    OT="remove"
else
    echo "Not Parameter."
    exit 1
fi

if [ "$2" == "" ]; then
    LN_NAME="fw.txt"
else
    LN_NAME=$2
fi

cat ${LN_NAME} | while read LN
do
    LN=`echo ${LN} |awk -F"#" '{print \$1}'`
    if [ "${LN}" == "" ]; then
        echo ${OT} ${LN}
    else
        echo ${OT} ${LN}
        firewall-cmd --${OT}-forward-port=${LN}
        firewall-cmd --${OT}-forward-port=${LN} --permanent
    fi
done

Example

## fw.txt
# win-remote
port=32010:proto=tcp:toport=3389:toaddr=192.168.33.2 
# SSH 22
port=32023:proto=tcp:toport=22:toaddr=192.168.33.3
# other
port=33010:proto=tcp:toport=5432:toaddr=192.168.33.4
port=33011:proto=tcp:toport=9200:toaddr=192.168.33.28
port=33020:proto=tcp:toport=8123:toaddr=192.168.33.36
port=33021:proto=tcp:toport=9000:toaddr=192.168.33.36
# web
port=33080:proto=tcp:toport=80:toaddr=192.168.33.4

参考

1. 防火墙富规则、内部上网
2. CloudFlare Tunnel 免费内网穿透的简明教程