OpenWRT使用wifidog实现强制认证的WIFI热点

首先安装wifidog到OpenWRT的路由器：

  opkg update

  opkg install wifidog

  

wifidog依赖下面这些模块：

iptables-mod-extra

iptables-mod-ipopt

kmod-ipt-nat

iptables-mod-nat-extra

libpthread

  

由于trunk的固件更新会比较频繁，会导致直接opkg install wifidog安装不了，如果你凑巧又没有备份与固件对应的Packages的话，就需要到http://downloads.openwrt.org/snapshots/trunk升级固件，然后再安装wifidog。我备份了一个2013年7月份(kernel =3.10.3-1-9da5017d589c0594e545ab00a51eecea)的版本的Packages，需要的话拿去用:

http://openwrt.sinapp.net

  

如果你的路由器不是openwrt官方支持的版本的话，那就需要自己编译固件。make menuconfig后，在Network–>Captive Portals中选择wifidog.

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安装完成后，

/etc/init.d/wifidog enable

/etc/init.d/wifidog start

  

这时会抛出一个错误，因为我们还没有设置AuthServer的信息。关于安装wifidog更多的信息可以参考：http://wiki.openwrt.org/doc/howto/wireless.hotspot.wifidog

  

下面安装Auth Server，按照官方的说法：

AuthPuppy is the next generation authentication server for Wifidog networks.

源文档 <http://www.authpuppy.org/>

不过貌似这wifidog和Authpuppy都已经N久没更新了。。。 

 

AuthPutty是需要安装apache2, php5和MySQL。详细介绍在这里：http://www.authpuppy.org/doc/Getting_Started (Windows版点这里)。

 

安装成功后，访问AuthPuppy会要求设置一些数据库信息，全部设置完成后能看到首页：

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当然了，我们还需要设置管理员的账号。

 

进入Manage plugins，Install apAuthLocalUserPlugin，记得要enable这个插件。

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然后，点击Manage Nodes，把默认节点的status改成deployed。这个GW(Gateway) ID default后面配置wifidog.conf的时候需要使用。

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到这里，AuthPuppy就基本配置完毕了。

 

下面回到路由器，编辑wifidog.conf，一般情况下，我们之后配置ExternalInterface，GatewayInterface和AuthServer这三项就可以，其他默认。下面是我的配置：

GatewayIDdefault           #注意这个ID必须跟AuthPuppy的GW ID一致

# Parameter: ExternalInterface

# Default: NONE

# Optional

#

# Set this to the external interface (the one going out to the Inernet or your larger LAN).

# Typically vlan1 for OpenWrt, and eth0 or ppp0 otherwise,

# Normally autodetected

ExternalInterface eth0      #路由器外网的物理接口

 

# Parameter: GatewayInterface

# Default: NONE

# Mandatory

#

# Set this to the internal interface (typically your wifi interface).

# Typically br-lan for OpenWrt, and eth1, wlan0, ath0, etc. otherwise

GatewayInterface wlan0      #路由器内网的物理接口

AuthServer {

    Hostname 192.170.1.104

    SSLAvailable no

    Path /

 

CheckInterval 60

ClientTimeout 5

FirewallRuleSet global {

}

FirewallRuleSet validating-users {

    FirewallRule allow to 0.0.0.0/0

}

FirewallRuleSet known-users {

    FirewallRule allow to 0.0.0.0/0

}

FirewallRuleSet unknown-users {

    FirewallRule allow udp port 53

    FirewallRule allow tcp port 53

    FirewallRule allow udp port 67

    FirewallRule allow tcp port 67

}

FirewallRuleSet locked-users {

    FirewallRule block to 0.0.0.0/0

}

 

注意这个Interface是物理接口，而不是下面OpenWRT web界面中看到的interface。注意不是下面这个：

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可以看到我的Interface里面没有wlan0之类的选项，/etc/config/network里面也看不到。

root@OpenWrt:~# cat /etc/config/network

config interface ‘loopback’

        option ifname ‘lo’

        option proto ‘static’

        option ipaddr ‘127.0.0.1’

        option netmask ‘255.0.0.0’

config globals ‘globals’

        option ula_prefix ‘fd09:fd03:490d::/48′

config interface ‘lan’

        option proto ‘static’

        option ipaddr ‘192.168.1.1’

        option netmask ‘255.255.255.0’

        option ip6assign ’60’

        option _orig_ifname ‘eth0′

        option _orig_bridge ‘false’

config interface ‘WAN’

        option proto ‘dhcp’

        option _orig_ifname ‘gretap0′

        option _orig_bridge ‘false’

        option ifname ‘eth0′

 

之前我用gretap0和eth0设置ExternalInterface和GatewayInterface，不行。反着来也不行。网上搜了一圈，找到下面的方法来获取physical interface：

root@OpenWrt:~# ls -l /sys/class/net

lrwxrwxrwx    1 root     root             0 Jan  1  1970 eth0 -> ../../devices/platform/ag71xx.0/net/eth0

lrwxrwxrwx    1 root     root             0 Jan  1  1970 lo -> ../../devices/virtual/net/lo

lrwxrwxrwx    1 root     root             0 Aug  2 15:58 wlan0 -> ../../devices/platform/ar933x_wmac/net/wlan0

 

源文档 <http://unix.stackexchange.com/questions/57309/how-can-i-tell-whether-a-network-interface-is-physical-device-or-virtual-alia>

 

 OK，原来我这边也是有wlan0这个interface的，找到之后添加在wifidog.conf上。重启wifidog，成功。

 

 另外：

You can also run wifidog in foreground/Debug mode:

wifidog -f -d 7

  -f means to run in foreground (do not become a background daemon)

  -d 7 increases Debug output level to the maximum