WLAN已连接但无法访问互联网

WLAN已连接但无法访问互联网

我有一个 Linux 盒子,有以太网、wlan STA/客户端和 wlan 接入点。这是通过以太网连接的互联网,我可以通过 ssh 登录到盒子。但我希望像无线路由器一样使用该盒子,并且能够通过智能手机等方式连接到互联网。我可以将手机连接到 WiFi,但无法访问互联网。

这是我的界面:

eth0是以太网
eth1eth2是 WLAN

# ifconfig
br0       Link encap:Ethernet  HWaddr 00:15:BC:22:17:20
          inet addr:10.10.1.116  Bcast:10.10.1.255  Mask:255.255.255.0
          inet6 addr: fe80::215:bcff:fe22:1720/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6377 errors:0 dropped:608 overruns:0 frame:0
          TX packets:615 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:865911 (845.6 KiB)  TX bytes:59751 (58.3 KiB)

eth0      Link encap:Ethernet  HWaddr 00:15:BC:22:17:20
          inet6 addr: fe80::215:bcff:fe22:1720/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6417 errors:0 dropped:6 overruns:0 frame:0
          TX packets:623 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:985364 (962.2 KiB)  TX bytes:60399 (58.9 KiB)

eth1      Link encap:Ethernet  HWaddr 00:15:BC:22:17:21
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth2      Link encap:Ethernet  HWaddr 02:15:BC:22:17:21
          inet addr:192.168.2.10  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::15:bcff:fe22:1721/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:502 errors:0 dropped:3 overruns:0 frame:0
          TX packets:236 errors:0 dropped:8 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:44998 (43.9 KiB)  TX bytes:24874 (24.2 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:164 errors:0 dropped:0 overruns:0 frame:0
          TX packets:164 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:13525 (13.2 KiB)  TX bytes:13525 (13.2 Ki

二)

这是/etc/network/interfaces文件:

auto lo
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet dhcp

iface eth2 inet dhcp

iface br0 inet dhcp
hostname gw-143A
   bridged_ports  eth0

无线的:

# iwconfig
tap0      no wireless extensions.

lo        no wireless extensions.

br0       no wireless extensions.

eth2      IEEE 802.11-bgn  Mode:Master  Frequency:2.457 GHz

eth1      IEEE 802.11-bgn  ESSID:""
          Mode:Managed  Frequency:2.437 GHz  Access Point: Not-Associated
          Bit Rate:0 kb/s
          RTS thr:off   Fragment thr:off
          Encryption key:9F64-0D78-CCAB-A8 [3]
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

sit0      no wireless extensions.

eth0      no wireless extensions.

答案1

为了让您的 Linux 盒子充当 WLAN 接入点,您需要:

  • 确保您的无线网卡使用支持AP的驱动。的输出lsmod | grep 80211通常会有所帮助。如果您的驱动程序不支持 AP 模式,则您必须购买一个支持 AP 模式的新 WLAN 适配器。
  • 确保你的内核支持IP转发并启用它。这通常是通过echo 1 > /proc/sys/net/ipv4/ip_forward以 root 身份运行来完成的。
  • 配置路由表以将网络数据包转发br0eth2

sudo iptables -t nat -A POSTROUTING -o br0 -j MASQUERADE

sudo iptables -A FORWARD -i br0 -o eth2 -m state --state RELATED,ESTABLISHED -j ACCEPT

sudo iptables -A FORWARD -i eth2 -o br0 -j ACCEPT

  • 安装并配置接入点管理软件
  • 配置 DHCP 服务器,该服务器将为您的电话分配 IP 地址(如果尚未完成)。

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