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Hi All, I'm facing this issue since I've installed RHEL 6 ( exactly same problem in Fedora 17 as well). My WiFi is connected perfectly, it also shows my SSID ...
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  1. #1
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    WiFi is connected but unable to access internet in RHEL 6


    Hi All,

    I'm facing this issue since I've installed RHEL 6 ( exactly same problem in Fedora 17 as well). My WiFi is connected perfectly, it also shows my SSID in Network Connections (under Wireles tab)but as a matter of fact I cannot access anything, nor internet neither my router pager.

    When I check Connection Information (by right clicking on wireless icon in top right)I see all information which is necessary for a connection to establish. My internet works like a charm when connected via wire, no issues at all.

    Please advise, what could be the reason for such a behaviour?

    Kind regards,
    Aniruddha Jagdale
    Attached Images Attached Images

  2. #2
    Administrator MikeTbob's Avatar
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    Hello and Welcome.
    I've moved your thread here for more exposure.
    Try this link and post your info back into this thread, hopefully someone can help figure out what's going wrong.
    http://www.linuxforums.org/forum/wir...tart-here.html
    I do not respond to private messages asking for Linux help, Please keep it on the forums only.
    All new users please read this.** Forum FAQS. ** Adopt an unanswered post.

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  3. #3
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    The thread you mentioned is closed now... I've attached a txt file as described in that thread.. Please advise.


    Code:
    ============ lspci ============
    00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
    	Subsystem: Lenovo Device [17aa:20e0]
    	Kernel driver in use: agpgart-intel
    00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
    	Subsystem: Lenovo Device [17aa:20e4]
    	Kernel driver in use: i915
    	Kernel modules: i915
    00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
    	Subsystem: Lenovo Device [17aa:20e4]
    00:03.0 Communication controller [0780]: Intel Corporation Mobile 4 Series Chipset MEI Controller [8086:2a44] (rev 07)
    	Subsystem: Lenovo Device [17aa:20e6]
    00:03.3 Serial controller [0700]: Intel Corporation Mobile 4 Series Chipset AMT SOL Redirection [8086:2a47] (rev 07)
    	Subsystem: Lenovo Device [17aa:20ec]
    	Kernel driver in use: serial
    00:19.0 Ethernet controller [0200]: Intel Corporation 82567LM Gigabit Network Connection [8086:10f5] (rev 03)
    	Subsystem: Lenovo Device [17aa:20ee]
    	Kernel driver in use: e1000e
    	Kernel modules: e1000e
    00:1a.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1a.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1a.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1a.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f1]
    	Kernel driver in use: ehci_hcd
    00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f2]
    	Kernel driver in use: HDA Intel
    	Kernel modules: snd-hda-intel
    00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 03)
    	Kernel driver in use: pcieport
    00:1c.1 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 [8086:2942] (rev 03)
    	Kernel driver in use: pcieport
    00:1c.3 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 [8086:2946] (rev 03)
    	Kernel driver in use: pcieport
    00:1c.4 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 [8086:2948] (rev 03)
    	Kernel driver in use: pcieport
    00:1d.0 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1d.1 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1d.2 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f0]
    	Kernel driver in use: uhci_hcd
    00:1d.7 USB Controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f1]
    	Kernel driver in use: ehci_hcd
    00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93)
    00:1f.0 ISA bridge [0601]: Intel Corporation ICH9M-E LPC Interface Controller [8086:2917] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f5]
    	Kernel modules: iTCO_wdt
    00:1f.2 IDE interface [0101]: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller [8086:2928] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f7]
    	Kernel driver in use: ata_piix
    	Kernel modules: ata_piix
    00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 03)
    	Subsystem: Lenovo Device [17aa:20f9]
    	Kernel driver in use: i801_smbus
    	Kernel modules: i2c-i801
    03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection [8086:4237]
    	Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1211]
    	Kernel driver in use: iwlagn
    	Kernel modules: iwlagn
    15:00.0 CardBus bridge [0607]: Ricoh Co Ltd RL5c476 II [1180:0476] (rev ba)
    	Subsystem: Lenovo Device [17aa:20c6]
    	Kernel driver in use: yenta_cardbus
    	Kernel modules: yenta_socket
    15:00.1 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller [1180:0832] (rev 04)
    	Subsystem: Lenovo Device [17aa:20c7]
    	Kernel driver in use: firewire_ohci
    	Kernel modules: firewire-ohci
    Code:
    ============ lsusb ============
    Bus 008 DeviBus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Code:
    ============ lsmod ============
    Module                  Size  Used by
    aes_i586                7208  2 
    aes_generic            26803  1 aes_i586
    fuse                   56128  2 
    xt_CHECKSUM              921  1 
    iptable_mangle          2583  1 
    ipt_MASQUERADE          1796  3 
    iptable_nat             5027  1 
    nf_nat                 18618  2 ipt_MASQUERADE,iptable_nat
    bridge                 61127  0 
    stp                     1563  1 bridge
    llc                     4392  2 bridge,stp
    autofs4                21604  3 
    sunrpc                197617  1 
    cpufreq_ondemand        8454  2 
    acpi_cpufreq            7384  1 
    xt_physdev              1415  1 
    ipt_REJECT              1905  4 
    nf_conntrack_ipv4       7700  6 iptable_nat,nf_nat
    nf_defrag_ipv4          1013  1 nf_conntrack_ipv4
    iptable_filter          2147  1 
    ip_tables               9541  3 iptable_mangle,iptable_nat,iptable_filter
    ip6t_REJECT             3961  2 
    nf_conntrack_ipv6      16198  2 
    xt_state                1006  5 
    nf_conntrack           66010  6 ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4,nf_conntrack_ipv6,xt_state
    ip6table_filter         2219  1 
    ip6_tables             10809  1 ip6table_filter
    ipv6                  264702  30 ip6t_REJECT,nf_conntrack_ipv6
    dm_mirror              11620  0 
    dm_region_hash         10127  1 dm_mirror
    dm_log                  8520  2 dm_mirror,dm_region_hash
    uinput                  6218  0 
    thinkpad_acpi          57137  0 
    hwmon                   1872  1 thinkpad_acpi
    wmi                     5189  0 
    sg                     24778  0 
    i2c_i801                9222  0 
    iTCO_wdt                9324  0 
    iTCO_vendor_support     2382  1 iTCO_wdt
    arc4                    1093  2 
    ecb                     1587  2 
    iwlagn                101687  0 
    iwlcore               108687  1 iwlagn
    mac80211              129050  2 iwlagn,iwlcore
    cfg80211              118045  3 iwlagn,iwlcore,mac80211
    rfkill                 15252  3 thinkpad_acpi,cfg80211
    snd_hda_codec_conexant    28491  1 
    snd_hda_intel          21333  2 
    snd_hda_codec          70277  2 snd_hda_codec_conexant,snd_hda_intel
    snd_hwdep               5320  1 snd_hda_codec
    snd_seq                46091  0 
    snd_seq_device          5354  1 snd_seq
    snd_pcm                67225  2 snd_hda_intel,snd_hda_codec
    snd_timer              18308  2 snd_seq,snd_pcm
    snd                    52722  12 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
    soundcore               6460  1 snd
    snd_page_alloc          7080  2 snd_hda_intel,snd_pcm
    e1000e                121856  0 
    ext4                  322814  2 
    mbcache                 5918  1 ext4
    jbd2                   73876  1 ext4
    sr_mod                 14187  0 
    cdrom                  34035  1 sr_mod
    sd_mod                 33344  4 
    crc_t10dif              1191  1 sd_mod
    firewire_ohci          21090  0 
    firewire_core          42630  1 firewire_ohci
    crc_itu_t               1343  1 firewire_core
    yenta_socket           35085  1 
    rsrc_nonstatic         10015  1 yenta_socket
    pata_acpi               2487  0 
    ata_generic             2555  0 
    ata_piix               19016  3 
    i915                  290623  3 
    drm_kms_helper         29029  1 i915
    drm                   162327  4 i915,drm_kms_helper
    i2c_algo_bit            4600  1 i915
    i2c_core               25799  5 i2c_i801,i915,drm_kms_helper,drm,i2c_algo_bit
    video                  16662  1 i915
    output                  1779  1 video
    dm_mod                 63859  2 dm_mirror,dm_log
    ============ dmesg-firmware ============
    Code:
    IBM TrackPoint firmware: 0x0e, buttons: 3/3
    platform microcode: firmware: requesting intel-ucode/06-17-06
    platform microcode: firmware: requesting intel-ucode/06-17-06
    iwlagn 0000:03:00.0: firmware: requesting iwlwifi-5000-2.ucode
    iwlagn 0000:03:00.0: loaded firmware version 8.24.2
    .12

    ============ kernel version ============
    Code:
    2.6.32-71.el6.i686
    ============ ifconfig ============
    Code:
        inet addr:192.168.2.3  Bcast:192.168.2.255  Mask:255.255.255.0
              inet6 addr: fe80::ce52:afff:fece:1af0/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:13305 errors:0 dropped:0 overruns:0 frame:0
              TX packets:12553 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:100 
              RX bytes:12669057 (12.0 MiB)  TX bytes:1939207 (1.8 MiB)
              Memory:fc000000-fc020000 
    
    lo        Link encap:Local Loopback  
              inet addr:127.0eth0      Link encap:Ethernet  HWaddr CC:52:AF:CE:1A:F0  
        .0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  Metric:1
              RX packets:16 errors:0 dropped:0 overruns:0 frame:0
              TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)
    
    virbr0    Link encap:Ethernet  HWaddr 22:8C:88:7D:63:E3  
              inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:0 (0.0 b)  TX bytes:4035 (3.9 KiB)
    
    wlan0     Link encap:Ethernet  HWaddr 00:22:FA:43:04:C0  
              inet addr:192.168.2.2  Bcast:192.168.2.255  Mask:255.255.255.0
              inet6 addr: fe80::222:faff:fe43:4c0/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:41 errors:0 dropped:0 overruns:0 frame:0
              TX packets:180 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:4596 (4.4 KiB)  TX bytes:23421 (22.8 KiB)
    ============ iwconfig ============
    Code:
    wlan0     IEEE 802.11abgn  ESSID:"belkin.7ad7"  
              Mode:Managed  Frequency:2.412 GHz  Access Point: 94:44:52:E9:DA:D7   
              Bit Rate=1 Mb/s   Tx-Power=15 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Encryption key:off
              Power Management:off
              Link Quality=70/70  Signal level=-23 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:0  Invalid misc:0   Missed beacon:0
    Attached Files Attached Files
    Last edited by MikeTbob; 04-24-2013 at 11:42 AM. Reason: added code tags

  4. #4
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    Nov 2009
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    225
    hotstepper.

    Do you have a switch that enables the wireless - you don't say what kind of box you are running but a lot of laptops have these switches. I have seen many times that although the wireless is switched off, the card itself is perfectly able to receive and will show you all available ssid points.

    Try using the command rfkill list (as root) to see if the wlan is hard and/or soft blocked. See man rfkill for other options.

    If you have a siemens amilo laptop, you will need to install a specific kernel module to enable the wireless since the on/off button on those laptops is software based.

    You could try tailing the messages file (tail -f /var/log/messages in openSuSE) and then see what your wireless driver, wpa-supplicant etc tell you.

    Good luck.

    Cheers - VP

  5. #5
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    Hi VoidPointer,

    Yes, there is a switch that enables the wireless. However, I've double checked and there is no issue on that front. I use Lenovo T400 and below are the results of commands you suggested

    [root@Sona Desktop]# rfkill list
    0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

    [root@Sona Desktop]# tail -f /var/log/messages
    Apr 24 16:58:39 Sona NetworkManager[1352]: <info> (wlan0): device state change: 8 -> 3 (reason 39)
    Apr 24 16:58:39 Sona NetworkManager[1352]: <info> (wlan0): deactivating device (reason: 39).
    Apr 24 16:58:39 Sona NetworkManager[1352]: <info> (wlan0): canceled DHCP transaction, DHCP client pid 2502
    Apr 24 16:58:39 Sona dnsmasq[1817]: reading /etc/resolv.conf
    Apr 24 16:58:39 Sona avahi-daemon[1364]: Withdrawing address record for 192.168.2.2 on wlan0.
    Apr 24 16:58:39 Sona dnsmasq[1817]: using nameserver 192.168.2.1#53
    Apr 24 16:58:39 Sona avahi-daemon[1364]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.2.2.
    Apr 24 16:58:39 Sona avahi-daemon[1364]: Interface wlan0.IPv4 no longer relevant for mDNS.
    Apr 24 16:58:39 Sona NetworkManager[1352]: <info> Policy set 'System eth0' (eth0) as default for IPv4 routing and DNS.
    Apr 24 16:58:39 Sona NetworkManager[1352]: <info> Policy set 'System eth0' (eth0) as default for IPv4 routing and DNS.


    You can also refer to above attached txt file and screen-shot.

    Thanks!!!

  6. #6
    Administrator MikeTbob's Avatar
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    Everything looks good to me. Be sure to bring eth0 down before you launch wlan0. Post any errors. Use sudo or su -.

    Code:
    ifconfig eth0 down
    Code:
    Code:
    ifconfig wlan0 up
    Code:
    iwlist wlan0 scan
    I do not respond to private messages asking for Linux help, Please keep it on the forums only.
    All new users please read this.** Forum FAQS. ** Adopt an unanswered post.

    I'd rather be lost at the lake than found at home.

  7. #7
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    Tried this too, but still no luck.

  8. #8
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    Give this a try, we are going to disable wireless 802.11n. To do this open a terminal and become root. Then type the following:

    Code:
    rmmod iwlagn
    This will remove the iwlagn driver from the kernel. Now we need to reload the driver but without wireless n support. In that terminal type the following:

    Code:
    modprobe iwlagn 11n_disable=1
    If this works, then we need to make it persistent by adding a configuration for the kernel when it is loaded, otherwise every time you restart, the above setting will be over-written. To make this setting persistent enter the following in that terminal:

    Code:
    echo 'options iwlagn 11n_disable=1' > /etc/modprobe.d/iwlagn.conf
    Let us know if this works for you =)

  9. #9
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    Hi Astrognome

    I appreciate your efforts, but this also didn't work

  10. #10
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    Well that is sure strange! May I ask two seemingly obvious questions:

    1) Has the wireless card worked in *any* OS? As in, had it worked in Windows?
    2) Are there other wireless devices that successfully connect to your router and have internet access?

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