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配置一个无线接口，device名称见同配置文件：

config wifi-iface 'guest'
        option device 'ra'
        option mode 'ap'
        option ssid 'PandoraBox-2.4G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

给创建的无线接口配置静态IP：

config interface 'guest'
       option proto 'static'
       option ipaddr '10.0.0.1'
       option netmask '255.255.255.0'

配置dhcp：

config dnsmasq
        #监听所有网卡
        option nonwildcard '0'
        #监听特定网卡
        #option nonwildcard '1'
        #list interface 'lan'    
        #list interface 'guest'  
        #略过

config dhcp 'guest'
        option interface 'guest'
        option start '100'
        option limit '150'
        option leasetime '1h'

配置iptables防火墙，访客网络接口为ra1：

iptables -A INPUT -i ra1 -p udp -m multiport --dport 53,67:68 -j ACCEPT
iptables -A FORWARD -i ra1 -o pppoe-wan -j ACCEPT

同时开放5G和2.4G访客网络：

config wifi-iface 'guest'
        option device 'ra'
        option mode 'ap'
        option ssid 'PandoraBox-2.4G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

config wifi-iface 'guest5'
        option device 'rax'
        option mode 'ap'
        option ssid 'PandoraBox-5G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

将2.4G和5G桥接：

config interface 'guest'
        option proto 'static'
        option ipaddr '10.0.0.1'
        option netmask '255.255.255.0'
        option type 'bridge'
        option _orig_ifname 'ra1 rax1'
        option _orig_bridge 'true'
        option ifname 'rax1'

iptables -A INPUT -i br-guest -p udp -m multiport --dport 53,67:68 -j ACCEPT
iptables -A FORWARD -i br-guest -o pppoe-wan -j ACCEPT

更改guest无线密码：

#!/bin/sh
str=haiyun`date +%s|cut -c 7-10|sed 's/4/6/g'`
echo $str
uci set wireless.guest.key=$str
uci set wireless.guest5.key=$str
uci commit wireless
wifi reload

参考：
https://openwrt.org/docs/guide-user/network/wifi/guestwifi/guest-wlan

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