♞树莓派之WIFI热点开启

№ 1 修改硬件配置

# interfaces(5) file used by ifup(8) and ifdown(8)

# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'

# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto eth0
#设置eth0为dhcp自动获取IP地址
iface eth0 inet dhcp

auto wlan0
#设置wlan0为指定IP地址
iface wlan0 inet static
#设置wlan0的IP地址(WIFI热点要使用的网段)
address 192.168.66.1
#设置wlan0的子网掩码
netmask 255.255.255.0
#设置wlan0的网关地址(与上面的address相关就行)
gateway 192.168.66.1

№ 2 安装软件

#安装AP程序
sudo apt install hostapd
#安装DHCP服务软件
sudo apt install udhcpd

№ 3 软件配置之hostapd

 Defaults for hostapd initscript
#
# WARNING: The DAEMON_CONF setting has been deprecated and will be removed
#          in future package releases.
#
# See /usr/share/doc/hostapd/README.Debian for information about alternative
# methods of managing hostapd.
#
# Uncomment and set DAEMON_CONF to the absolute path of a hostapd configuration
# file and hostapd will be started during system boot. An example configuration
# file can be found at /usr/share/doc/hostapd/examples/hostapd.conf.gz
#
#DAEMON_CONF=""

# Additional daemon options to be appended to hostapd command:-
#       -d   show more debug messages (-dd for even more)
#       -K   include key data in debug messages
#       -t   include timestamps in some debug messages
#
# Note that -B (daemon mode) and -P (pidfile) options are automatically
# configured by the init.d script and must not be added to DAEMON_OPTS.
#
#DAEMON_OPTS=""
#将#DAEMON_CONF=""修改为DAEMON_CONF="/etc/hostapd/hostapd.conf"
DAEMON_CONF="/etc/hostapd/hostapd.conf"

interface=wlan0
ssid=热点名称
channel=7
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=热点密码
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
ieee80211n=1
hw_mode=g
wmm_enabled=1

№ 4 软件配置之udhcpd

# Sample udhcpd configuration file (/etc/udhcpd.conf)

# The start and end of the IP lease block
# 开始地址与结束地址要根据你刚刚设置的wlan0的网段设置
start           192.168.66.100  #default: 192.168.0.20
end             192.168.66.200  #default: 192.168.0.254
……此处省略若干字……
#Examles
opt     dns     114.114.114.114 114.114.114.110
option  subnet  255.255.255.0
opt     router  192.168.66.1
opt     wins    192.168.66.1
#option dns     129.219.13.81   # appened to above DNS servers for a total of 3
option  domain  local
option  lease   7200            # 10 days of seconds
……此处省略若干字……

# Comment the following line to enable
# 在DHCPD_ENABLED="no"前面加上注释符#
#DHCPD_ENABLED="no"

# Options to pass to busybox' udhcpd.
#
# -S    Log to syslog
# -f    run in foreground

DHCPD_OPTS="-S"

№ 5 系统配置之路由转发规则

sudo nano /etc/sysctl.conf
# 去掉net.ipv4.ip_forward=1前#号

#使配置文件生效
sudo sysctl -p
#新建规则
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT
#保存配置到文件
sudo sh -c "iptables-save> /etc/iptables.ipv4.nat"

№ 6 系统设置之启动设置

#exit0前插入
sudo iptables-restore < /etc/iptables.ipv4.nat
sudo service udhcpd restart