Добрый вечер.
В общем ситуация такая. Имеются 3 компьютера   - 2 на винде и на 3-й я поставил Linux Ubuntu. Имеется также роутер Dlink DIR-400. Он соответственно раздаёт интернет. На компьютерах с Win - интернет подключается. На доступ стоит пароль. В Ubuntu пробовал через gui подключать - не подключает.
Через терминал - вот также:

root@unixware:~# iwconfig 
lo        no wireless extensions.
eth0      no wireless extensions.
wmaster0  no wireless extensions.
wlan0     IEEE 802.11bg  ESSID:"dlink"  
          Mode:Managed  Frequency:2.467 GHz  Access Point: 00:21:91:FF:8C:A7   
          Bit Rate=1 Mb/s   Tx-Power=18 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B   
          Encryption key:D289-A975-65BC-2D27-AC8B-8545-A5   Security mode:open
          Power Management:off
          Link Quality=40/100  Signal level:-70 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
pan0      no wireless extensions.
Кто если что знает - пожалуйста посоветуйте куда копать - до этого с  wi-fi вообще опыта не имел.
---------------------------------------------------------------------
root@unixware:~# iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:21:91:FF:8C:A7
                    ESSID:"dlink"
                    Mode:Master
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=48/100  Signal level:-72 dBm  
                    Encryption key:on
                    IE: Unknown: 0005646C696E6B
                    IE: Unknown: 010882848B0C12961824
                    IE: Unknown: 030106
                    IE: Unknown: 07064E4120010D14
                    IE: Unknown: 200100
                    IE: Unknown: 2A0107
                    IE: Unknown: 32043048606C
                    IE: Unknown: DD760050F204104A0001101044000101103B00010310470010565AA94967C14C0EAA8FF349E6F5931110210006442D4C696E6B1023000D442D4C696E6B20526F75746572102400074449522D343030104200046E6F6E651054000800060050F204000110110006442D4C696E6B1008000200841041000100
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:tsf=00000002262b1504
                    Extra: Last beacon: 1064ms ago
root@unixware:~# iwconfig wlan0 ap 00:21:91:FF:8C:A7 

Вот что говорит в /var/log/syslog :

/var/log/syslog
Jan 21 17:41:34 unixware hald: mounted /dev/sda1 on behalf of uid 1000
Jan 21 17:41:38 unixware NetworkManager: <info>  Device 'wlan0' DHCP transaction took too long (>45s), stopping it. 
Jan 21 17:41:38 unixware NetworkManager: <info>  wlan0: canceled DHCP transaction, dhcp client pid 3706 
Jan 21 17:41:38 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) scheduled... 
Jan 21 17:41:38 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) started... 
Jan 21 17:41:38 unixware NetworkManager: <info>  Activation (wlan0/wireless): could not get IP configuration for connection 'Auto dlink'. 
Jan 21 17:41:38 unixware NetworkManager: <info>  (wlan0): device state change: 7 -> 6 
Jan 21 17:41:38 unixware NetworkManager: <info>  Activation (wlan0/wireless): asking for new secrets 
Jan 21 17:41:38 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) complete. 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) started... 
Jan 21 17:41:44 unixware NetworkManager: <info>  (wlan0): device state change: 6 -> 4 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) starting... 
Jan 21 17:41:44 unixware NetworkManager: <info>  (wlan0): device state change: 4 -> 5 
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0/wireless): connection 'Auto dlink' has security, and secrets exist.  No new secrets needed. 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'ssid' value 'dlink' 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'scan_ssid' value '1' 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'key_mgmt' value 'NONE' 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'auth_alg' value 'OPEN' 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'wep_key0' value '<omitted>' 
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: added 'wep_tx_keyidx' value '0' 
Jan 21 17:41:44 unixware NetworkManager: nm_setting_802_1x_get_pkcs11_engine_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Jan 21 17:41:44 unixware NetworkManager: nm_setting_802_1x_get_pkcs11_module_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Jan 21 17:41:44 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) complete. 
Jan 21 17:41:44 unixware kernel: [  476.767400] wlan0: disassociating by local choice (reason=3)
Jan 21 17:41:44 unixware NetworkManager: <info>  Config: set interface ap_scan to 1 
Jan 21 17:41:44 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  completed -> disconnected 
Jan 21 17:41:44 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  disconnected -> scanning 
Jan 21 17:41:46 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  scanning -> associating 
Jan 21 17:41:46 unixware kernel: [  478.240083] wlan0: authenticate with AP 00:21:91:ff:8c:a7
Jan 21 17:41:46 unixware kernel: [  478.240137] wlan0: authenticate with AP 00:21:91:ff:8c:a7
Jan 21 17:41:46 unixware kernel: [  478.241962] wlan0: authenticated
Jan 21 17:41:46 unixware kernel: [  478.241970] wlan0: associate with AP 00:21:91:ff:8c:a7
Jan 21 17:41:46 unixware kernel: [  478.247895] wlan0: RX ReassocResp from 00:21:91:ff:8c:a7 (capab=0x11 status=0 aid=3)
Jan 21 17:41:46 unixware kernel: [  478.247900] wlan0: associated
Jan 21 17:41:46 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  associating -> associated 
Jan 21 17:41:46 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  associated -> completed 
Jan 21 17:41:46 unixware NetworkManager: <info>  Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'dlink'. 
Jan 21 17:41:46 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled. 
Jan 21 17:41:46 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) started... 
Jan 21 17:41:46 unixware NetworkManager: <info>  (wlan0): device state change: 5 -> 7 
Jan 21 17:41:46 unixware NetworkManager: <info>  Activation (wlan0) Beginning DHCP transaction. 
Jan 21 17:41:46 unixware NetworkManager: <info>  dhclient started with pid 3829 
Jan 21 17:41:46 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete. 
Jan 21 17:41:46 unixware dhclient: Internet Systems Consortium DHCP Client V3.1.1
Jan 21 17:41:46 unixware dhclient: Copyright 2004-2008 Internet Systems Consortium.
Jan 21 17:41:46 unixware dhclient: All rights reserved.
Jan 21 17:41:46 unixware dhclient: For info, please visit http://www.isc.org/sw/dhcp/
Jan 21 17:41:46 unixware dhclient: 
Jan 21 17:41:46 unixware dhclient: wmaster0: unknown hardware address type 801
Jan 21 17:41:46 unixware NetworkManager: <info>  DHCP: device wlan0 state changed normal exit -> preinit 
Jan 21 17:41:46 unixware dhclient: wmaster0: unknown hardware address type 801
Jan 21 17:41:46 unixware dhclient: Listening on LPF/wlan0/00:22:b0:01:b7:38
Jan 21 17:41:46 unixware dhclient: Sending on   LPF/wlan0/00:22:b0:01:b7:38
Jan 21 17:41:46 unixware dhclient: Sending on   Socket/fallback
Jan 21 17:41:48 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
Jan 21 17:41:53 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
Jan 21 17:42:01 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 18
Jan 21 17:42:19 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
Jan 21 17:42:27 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
Jan 21 17:42:31 unixware NetworkManager: <info>  Device 'wlan0' DHCP transaction took too long (>45s), stopping it. 
Jan 21 17:42:31 unixware NetworkManager: <info>  wlan0: canceled DHCP transaction, dhcp client pid 3829 
Jan 21 17:42:31 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) scheduled... 
Jan 21 17:42:31 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) started... 
Jan 21 17:42:31 unixware NetworkManager: <info>  Activation (wlan0/wireless): could not get IP configuration for connection 'Auto dlink'. 
Jan 21 17:42:31 unixware NetworkManager: <info>  (wlan0): device state change: 7 -> 6 
Jan 21 17:42:31 unixware NetworkManager: <info>  Activation (wlan0/wireless): asking for new secrets 
Jan 21 17:42:31 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) complete. 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) scheduled... 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) started... 
Jan 21 17:42:50 unixware NetworkManager: <info>  (wlan0): device state change: 6 -> 4 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) scheduled... 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 1 of 5 (Device Prepare) complete. 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) starting... 
Jan 21 17:42:50 unixware NetworkManager: <info>  (wlan0): device state change: 4 -> 5 
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0/wireless): connection 'Auto dlink' has security, and secrets exist.  No new secrets needed. 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'ssid' value 'dlink' 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'scan_ssid' value '1' 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'key_mgmt' value 'NONE' 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'auth_alg' value 'OPEN' 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'wep_key0' value '<omitted>' 
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: added 'wep_tx_keyidx' value '0' 
Jan 21 17:42:50 unixware NetworkManager: nm_setting_802_1x_get_pkcs11_engine_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Jan 21 17:42:50 unixware NetworkManager: nm_setting_802_1x_get_pkcs11_module_path: assertion `NM_IS_SETTING_802_1X (setting)' failed
Jan 21 17:42:50 unixware NetworkManager: <info>  Activation (wlan0) Stage 2 of 5 (Device Configure) complete. 
Jan 21 17:42:50 unixware kernel: [  542.780174] wlan0: disassociating by local choice (reason=3)
Jan 21 17:42:50 unixware NetworkManager: <info>  Config: set interface ap_scan to 1 
Jan 21 17:42:50 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  completed -> disconnected 
Jan 21 17:42:50 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  disconnected -> scanning 
Jan 21 17:42:52 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  scanning -> associating 
Jan 21 17:42:52 unixware kernel: [  544.241008] wlan0: authenticate with AP 00:21:91:ff:8c:a7
Jan 21 17:42:52 unixware kernel: [  544.242802] wlan0: authenticated
Jan 21 17:42:52 unixware kernel: [  544.242809] wlan0: associate with AP 00:21:91:ff:8c:a7
Jan 21 17:42:52 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  associating -> associated 
Jan 21 17:42:52 unixware kernel: [  544.246406] wlan0: RX ReassocResp from 00:21:91:ff:8c:a7 (capab=0x11 status=0 aid=3)
Jan 21 17:42:52 unixware kernel: [  544.246411] wlan0: associated
Jan 21 17:42:52 unixware NetworkManager: <info>  (wlan0): supplicant connection state:  associated -> completed 
Jan 21 17:42:52 unixware NetworkManager: <info>  Activation (wlan0/wireless) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'dlink'. 
Jan 21 17:42:52 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) scheduled. 
Jan 21 17:42:52 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) started... 
Jan 21 17:42:52 unixware NetworkManager: <info>  (wlan0): device state change: 5 -> 7 
Jan 21 17:42:52 unixware NetworkManager: <info>  Activation (wlan0) Beginning DHCP transaction. 
Jan 21 17:42:52 unixware NetworkManager: <info>  dhclient started with pid 3867 
Jan 21 17:42:52 unixware NetworkManager: <info>  Activation (wlan0) Stage 3 of 5 (IP Configure Start) complete. 
Jan 21 17:42:52 unixware dhclient: Internet Systems Consortium DHCP Client V3.1.1
Jan 21 17:42:52 unixware dhclient: Copyright 2004-2008 Internet Systems Consortium.
Jan 21 17:42:52 unixware dhclient: All rights reserved.
Jan 21 17:42:52 unixware dhclient: For info, please visit http://www.isc.org/sw/dhcp/
Jan 21 17:42:52 unixware dhclient: 
Jan 21 17:42:52 unixware dhclient: wmaster0: unknown hardware address type 801
Jan 21 17:42:52 unixware dhclient: wmaster0: unknown hardware address type 801
Jan 21 17:42:52 unixware NetworkManager: <info>  DHCP: device wlan0 state changed normal exit -> preinit 
Jan 21 17:42:52 unixware dhclient: Listening on LPF/wlan0/00:22:b0:01:b7:38
Jan 21 17:42:52 unixware dhclient: Sending on   LPF/wlan0/00:22:b0:01:b7:38
Jan 21 17:42:52 unixware dhclient: Sending on   Socket/fallback
Jan 21 17:42:53 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
Jan 21 17:42:56 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
Jan 21 17:43:03 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 21
Jan 21 17:43:24 unixware dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
Jan 21 17:43:37 unixware NetworkManager: <info>  Device 'wlan0' DHCP transaction took too long (>45s), stopping it. 
Jan 21 17:43:37 unixware NetworkManager: <info>  wlan0: canceled DHCP transaction, dhcp client pid 3867 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) scheduled... 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) started... 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0/wireless): could not get IP configuration for connection 'Auto dlink'. 
Jan 21 17:43:37 unixware NetworkManager: <info>  (wlan0): device state change: 7 -> 9 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0) failed for access point (dlink) 
Jan 21 17:43:37 unixware NetworkManager: <info>  Marking connection 'Auto dlink' invalid. 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0) failed. 
Jan 21 17:43:37 unixware NetworkManager: <info>  Activation (wlan0) Stage 4 of 5 (IP Configure Timeout) complete. 
Jan 21 17:43:37 unixware NetworkManager: <info>  (wlan0): device state change: 9 -> 3 
Jan 21 17:43:37 unixware NetworkManager: <info>  (wlan0): deactivating device (reason: 0). 
Jan 21 17:43:37 unixware kernel: [  589.330649] wlan0: disassociating by local choice (reason=3)