☰

如何找出无法连接 WLAN 的原因？

tag-icon • tag-icon networkmanager wlan
如何找出无法连接 WLAN 的原因？

我可以使用笔记本电脑连接到具有 ESSID 的 WLAN 75% Internet，但不能使用台式计算机（它也适用于我的智能手机，但不适用于我的平板电脑）。我可以看到 WLAN sudo iwlist wlan0 scan，但不能看到iwlist wlan0 scan。 （在我的笔记本电脑上，我可以在没有超级用户权限的情况下看到它）

如何找出无法连接到网络的原因？

这似乎不是驱动程序问题，因为我可以看到 ESSID（对吗？）。但我不知道如何获得更多反馈。 WLAN 中的设备是否太多？我的 MAC 地址被封锁了吗？台式电脑的WLAN卡是否太弱？我的台式机/平板电脑上是否存在其他配置错误？ （顺便说一句：我可以在大学用平板电脑登录，所以原则上平板电脑的WLAN可以工作。但不能使用特定的网络）

我的系统

$ cat /etc/issue
Linux Mint 17 Qiana \n \l

$ uname -a
Linux pc09 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

$ sudo iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:1F:3F:10:85:C7
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=49/70  Signal level=-61 dBm  
                    Encryption key:on
                    ESSID:"75% Internet"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
                              36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 80ms ago
                    IE: Unknown: 000D3530252050617274797A6F6E65
                    IE: Unknown: 010482848B96
                    IE: Unknown: 030101
                    IE: Unknown: 2A0107
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32080C1218243048606C
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD0A0800280101000200FF0F
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 02 - Address: 34:31:C4:0A:A8:19
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=32/70  Signal level=-78 dBm  
                    Encryption key:on
                    ESSID:"easybell DSL"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000000000000
                    Extra: Last beacon: 80ms ago
                    IE: Unknown: 000C6561737962656C6C2044534C
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030101
                    IE: Unknown: 0706444520010D14
                    IE: Unknown: 2A0102
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1AEF111BFFFFFF00000000000000000001000000000406E6470D00
                    IE: Unknown: 3D1601000100000000000000000000000000000000000000
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F080100000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: Unknown: DD0C00040E010102010000000000
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD6F0050F204104A0001101044000102103B0001031047001023B98D96D9E54CF961DE3431C40AA8191021000341564D1023000446426F78102400043030303010420004303030301054000800060050F20400011011000446426F78100800022788103C0001031049000600372A000120

相关内容