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1 CentOS 安装和配置无线网卡指南 1. 下载无线无线网卡网卡驱动程序 ; 2. 安装无线网卡驱动程序 ; 3. 配置无线拨号配置文件 ; 4. 注意事项 1, 到下载最新的 madwifi- hal 文件, 如 madwifi-hal r tar.gz; 2, 解压后.gz 文件后用 make && make install 编译安装, 最好从新启动一下系统 ; 3, 确保下列类似信息的存在 :[simonsun@magic ~]$ /sbin/lspci grep Ethernet 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) 06:00.0 Ethernet controller: Atheros Communications Inc. AR242x abg Wireless PCI Express Adapter (rev 01) [simonsun@magic ~]$ dmesg grep "HAL" [simonsun@magic ~]$ /sbin/lsmod grep ath dm_multipath scsi_dh dm_multipath ath_rate_sample ath_pci wlan ath_hal dm_mod wlan_tkip,wlan_scan_sta,ath_rate_sample,ath_pci ath_rate_sample,ath_pci dm_multipath,dm_raid45,dm_snapshot,dm_zero,dm_mirror,dm_log [simonsun@magic ~]$ /sbin/iwlist Usage: iwlist [interface] scanning [interface] frequency [interface] channel [interface] bitrate [interface] rate

2 [interface] encryption [interface] key [interface] power [interface] txpower [interface] retry [interface] ap [interface] accesspoints [interface] peers [interface] event ~]$ 即 : 网卡是否检测到网卡驱动是否被系统识别是否有错误信息等然后开始搜寻无线网络, 如 [simonsun@magic ~]$ /sbin/iwlist ath0 scan ath0 Scan completed : Cell 01 - Address: 08:10:74:2B:C3:90 ESSID:"NETCORE" Quality=46/70 Signal level=-49 dbm Noise level=-95 dbm 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (1) : TKIP Authentication Suites (1) : PSK Cell 02 - Address: 00:22:B0:91:5B:D1 ESSID:"dlink-starsing"

3 Frequency:2.417 GHz (Channel 2) Quality=23/70 Signal level=-72 dbm Noise level=-95 dbm 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s IE: IEEE i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK Extra:ath_ie=dd f ff7f Cell 03 - Address: 00:19:E0:AD:B1:5E ESSID:"TP-LINK" Quality=17/70 Signal level=-78 dbm Noise level=-95 dbm 12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s Extra:ath_ie=dd f ff7f Cell 04 - Address: 00:21:27:BA:63:A2 ESSID:"TP-LINK_BA63A0" Quality=12/70 Signal level=-83 dbm Noise level=-95 dbm

4 Encryption key:off 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s Extra:wme_ie=dd180050f a a e f00 Extra:ath_ie=dd f ff7f Cell 05 - Address: 00:B0:0C:04:C4:D2 ESSID:"TENDA" Frequency:2.452 GHz (Channel 9) Quality=15/70 Signal level=-80 dbm Noise level=-95 dbm Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s 36 Mb/s; Cell 06 - Address: 00:23:CD:36:D3:C4 ESSID:"TP-LINK_36D3C4" Quality=11/70 Signal level=-84 dbm Noise level=-95 dbm Encryption key:off 12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s Extra:ath_ie=dd f ff7f Cell 07 - Address: 00:B0:0C:03:B0:64 ESSID:"Tenda" Quality=17/70 Signal level=-78 dbm Noise level=-95 dbm

5 Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s 18 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 12 Mb/s 24 Mb/s; 48 Mb/s Extra:wme_ie=dd180050f a a e f00 Cell 08 - Address: 00:1B:11:8C:3B:8C ESSID:"dlink" Frequency:2.462 GHz (Channel 11) Quality=7/70 Signal level=-88 dbm Noise level=-95 dbm 9 Mb/s; 12 Mb/s; 48 Mb/s; 18 Mb/s; 24 Mb/s 36 Mb/s; 54 Mb/s 根据实际情况编辑如下文件, 或者通过 system-config-network 的图形化界面配置, [simonsun@magic ~]$ sudo vim /etc/sysconfig/network-scripts/ifcfg-ath0 # Atheros Communications Inc. AR242x abg Wireless PCI Express Adapter DEVICE=ath0 BOOTPROTO=none ONBOOT=no HWADDR=00:22:43:2d:ae:2b NETMASK= DHCP_HOSTNAME= IPADDR= DOMAIN= TYPE=Wireless ESSID=NETCORE CHANNEL= MODE=Managed

6 SECURITYMODE=off RATE=auto USERCTL=no IPV6INIT=no PEERDNS=yes GATEWAY= 配好会有 : [simonsun@magic ~]$ /sbin/iwconfig ath0 ath0 IEEE g ESSID:"NETCORE" Nickname:"magic.linux" Mode:Managed Frequency:2.437 GHz Access Point: 08:10:74:2B:C3:90 Bit Rate:48 Mb/s Tx-Power:17 dbm Sensitivity=1/1 Retry:off RTS thr:off Fragment thr:off Power Management:off Link Quality=48/70 Signal level=-48 dbm Noise level=-96 dbm Rx invalid nwid:38122 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 最后, 激活配置好的无线网卡, [simonsun@magic ~]$ sudo /sbin/ifconfig ath0 up [simonsun@magic ~]$ sudo /sbin/ifup ath0 [simonsun@magic ~]$ /sbin/ifconfig ath0 ath0 Link encap:ethernet HWaddr 00:22:43:2D:AE:2B inet addr: Bcast: Mask: inet6 addr: fe80::222:43ff:fe2d:ae2b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets: errors:0 dropped:0 overruns:0 frame.:0 TX packets:30806 errors:1 dropped:1 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes: (134.2 MiB) TX bytes: (1.8 MiB)

7 ~]$ ping PING www-china.l.google.com ( ) 56(84) bytes of data. 64 bytes from jp-in-f99.google.com ( ): icmp_seq=1 ttl=246 time=67.1 ms 64 bytes from jp-in-f99.google.com ( ): icmp_seq=2 ttl=246 time=65.3 ms 64 bytes from jp-in-f99.google.com ( ): icmp_seq=3 ttl=246 time=66.4 ms 64 bytes from jp-in-f99.google.com ( ): icmp_seq=4 ttl=246 time=65.8 ms --- www-china.l.google.com ping statistics packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = /66.205/67.137/0.714 ms [simonsun@magic ~]$ 4. 注意事项, 一般需要设置 DNS, 不要忘了 ; 如果是根据 mac 地址限制网络使用的话, 一定要将无线网卡的 mac 地址正确的添加到路由器 ; 如果连接模式通过 WPA-PSK 进行加密登录的话, 就需要用到 wpa_supplicant: [simonsun@magic ~]$ sudo yum install \*wpa\* [simonsun@magic ~]$ /usr/sbin/wpa_passphrase NETCORE network={ ssid="netcore" #psk=" " psk= dce955a d7216a1407d1cb97b8fb339c05f8773a3f780d6663 } [simonsun@magic ~]$ sudo vim /etc/wpa_supplicant/wpa_supplicant.conf 修改如下 : ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel #network={

8 # ssid="any" # key_mgmt=none #} network={ ssid="netcore" #psk=" " psk= dce955a d7216a1407d1cb97b8fb339c05f8773a3f780d6663 } [simonsun@magic ~]$ sudo vim /etc/sysconfig/wpa_supplicant 修改 INTERFACES 为前面装好驱动后识别的网卡, 如 ath0, 我这里是 : # Use the flag "-i" before each of your interfaces, like so: # INTERFACES="-i eth1 -i wlan0" INTERFACES="-i ath0" # Use the flag "-D" before each driver, like so: # DRIVERS="-D wext" DRIVERS="-D wext" # Other arguments # -u Enable the D-Bus interface (required for use with NetworkManager) # -f Log to /var/log/wpa_supplicant.log OTHER_ARGS="-u -f /var/log/wpa_supplicant.log", 然后启动 wpa 服务, [simonsun@magic ~]$ sudo /etc/rc.d/init.d/wpa_supplicant start Starting wpa_supplicant: /etc/wpa_supplicant/wpa_supplicant[ 确定 ]-i ath0 -D wext -u -f /var/log/wpa_supplicant.log, 然后拨号, 平时上网, 只执行如下脚本即可 sudo /sbin/ifconfig ath0 up sudo /sbin/ifdown ath0 sudo /sbin/ifup ath0

9 sudo /etc/rc.d/init.d/wpa_supplicant restart sudo /etc/rc.d/init.d/iptables restart 参考连接 : BTW, 特别鸣谢秦公子网络环境方面的帮助 , 如果系统内核升级了, 必须重新编译一下驱动, 再次配置备注 : 如果 SSID 名字改了, 须要重新修改无线网络配置里的无线设置设置的网络名称的指定的, 同时必须 ( 千万别忘了 ) 重新生成一下密码钥匙, 即 : 用 /usr/sbin/wpa_passphrase 新名字新密码, 然后再次拨号即可其实最合理的是, 从新建一个无线拨号连接, 当然也得重新生成一下密码钥匙, 添加到 /etc/wpa_supplicant/wpa_supplicant.conf 里

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