将树莓派配置成路由器

安装pppoe拨号上网软件

sudo apt install pppoe pppoeconf pppstatus

更新系统

sudo apt update 
sudo apt dist-update

安装hostapd和dhcp

sudo apt install hostapd isc-dhcp-server

修改/etc/dhcp/dhcpd.conf 配置文件

• 注释以下两行

  # option domain-name "example.org";
  # option domain-name-servers ns1.example.org, ns2.example.org;

• 取消注释下面这行

  #authoritative;

• 在行尾加上

  subnet 192.168.42.0 netmask 255.255.255.0 {
      range 192.168.42.10 192.168.42.50;
      option broadcast-address 192.168.42.255;
      option routers 192.168.42.1;
      default-lease-time 600;
      max-lease-time 7200;
      option domain-name "local";
      option domain-name-servers 114.114.114.114, 114.114.115.115;
  }

修改/etc/default/isc-dhcp-server配置文件

• 更改INTERFACESv4并注释INTERFACESv6

  INTERFACESv4="wlan0"
  #INTERFACESv6=""

• 关闭wlan0接口

  sudo ifdown wlan0

修改/etc/network/interfaces配置文件

• 将下面行放到文件末尾

  auto lo
  iface lo inet loopback
  iface eth0 inet dhcp
  allow-hotplug wlan0
  iface wlan0 inet static
  address 192.168.42.1
  netmask 255.255.255.0
  post-up iw dev $IFACE set power_save off

• 强行更改ip

  sudo ifconfig wlan0 192.168.42.1

创建/etc/hostapd/hostapd.conf配置文件设置wifi

• 写入如下行

  interface=wlan0
  ssid=wifiname
  hw_mode=g
  channel=6
  macaddr_acl=0
  auth_algs=1
  ignore_broadcast_ssid=0
  wpa=2
  wpa_passphrase=password
  wpa_key_mgmt=WPA-PSK
  wpa_pairwise=TKIP
  rsn_pairwise=CCMP

修改/etc/sysctl.conf配置文件将pppoe与wifi连接起来实现wifi上网

• 在文件最后加上

  net.ipv4.ip_forward=1

• 刷一下iptables

  sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
  sudo iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
  sudo iptables -A FORWARD -i ppp0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
  sudo iptables -A FORWARD -i wlan0 -o ppp0 -j ACCEPT

  或

  sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
  sudo iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
  sudo iptables -A FORWARD -i ppp0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
  sudo iptables -A FORWARD -i wlan0 -o ppp0 -j ACCEPT

• 加入启动项全家通

  sudo sh -c "iptables-save > /etc/iptables.ipv4.nat"

• 最后在文件/etc/network/interfaces后加入如下行

  up iptables-restore < /etc/iptables.ipv4.nat

最后

sudo service hostapd start
sudo service isc-dhcp-server start
sudo reboot

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