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07-28-2009
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#1 (permalink)
| | Just Joined!
Join Date: Oct 2008
Posts: 11
| Can't Connect CentOS5 Wireless
I have just done a clean install of CentOS5 on an old PC desktop I had. It's got a Dynex Enhanced Wireless G Desktop Card in it which I believe the system is recognizing as eth1, but I just don't see where to enter my SSID or WEP key to connect. I have gone through the Admin->Network menu's a few different times, tried restarting the machine and making changes to things but still nothing.
I'm a complete newbie to Linux, so any help would be greatly appreciated  | 
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07-28-2009
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#2 (permalink)
| | Linux Guru
Join Date: Feb 2009 Location: Boston, MA
Posts: 2,198
| It's possible CentOS doesn't come with a graphical wireless tool, being a server and enterprise oriented distro. (By the way, unless you have a pressing reason to use it, I really recommend using a more desktop oriented distro as a beginner, such as Ubuntu or Fedora.)
Anyway, I would install WICD to handle your connections.
You can also set it up via the command line. (CentOS may not use "sudo", in which case you would login to root with su -, and it may not use dhclient, but dhcpd instead. | |
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07-28-2009
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#3 (permalink)
| | Super Moderator
Join Date: Oct 2004 Location: The Sovereign State of South Carolina
Posts: 4,136
| Quote:
Originally Posted by Ascendancy  I have just done a clean install of CentOS5 on an old PC desktop I had. It's got a Dynex Enhanced Wireless G Desktop Card in it which I believe the system is recognizing as eth1, but I just don't see where to enter my SSID or WEP key to connect. I have gone through the Admin->Network menu's a few different times, tried restarting the machine and making changes to things but still nothing.
I'm a complete newbie to Linux, so any help would be greatly appreciated | When I was using CentOS I can remember having similar issues with wireless devices seen as wired, thus giving no option to configure from the network configuration utility. If CentOS is "seeing" the card, perhaps you can get it configured from the command line. Normally wireless cards are "seen" as wlan0 but if you have no Ethernet card, that might explain why your wireless is being seen as eth0. Open a terminal and do: Press enter and input password. As "su" do these commands and please post the results of the first two if you can... Code: /sbin/ifconfig eth0
and: Code: /sbin/iwlist eth0 scan
No need to post the results of the last one but let us know if eth0 is detecting access points. If it finds none, do: and tell me if you see a module in there that begins with "bcm." 
Last edited by Dapper Dan; 07-28-2009 at 11:39 PM..
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07-28-2009
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#4 (permalink)
| | Super Moderator
Join Date: Oct 2004 Location: The Sovereign State of South Carolina
Posts: 4,136
| Quote:
Originally Posted by reed9 (By the way, unless you have a pressing reason to use it, I really recommend using a more desktop oriented distro as a beginner, such as Ubuntu or Fedora.) | I agree. As a new user CentOS can be a pretty tough distro. | |
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07-29-2009
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#5 (permalink)
| | Just Joined!
Join Date: Oct 2008
Posts: 11
| Yeah I have Ubuntu running on my laptop, I am just interested in working on a server distro as well because they're both 2 different environments. Here's my results from the terminal: Code: [root@localhost ~]# su -
[root@localhost ~]# /sbin/ifconfig etho0
etho0: error fetching interface information: Device not found
[root@localhost ~]# /sbin/ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:22:75:1A:4D:17
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)
Interrupt:11 Base address:0x4000
[root@localhost ~]# /sbin/iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
eth1 IEEE 802.11b/g ESSID:"" Nickname:"localhost.localdomain"
Mode:Master Frequency=2.412 GHz Access Point: Invalid
RTS thr:off Fragment thr:off
Encryption key:off
Link Quality=0/100 Signal level=-256 dBm Noise level=-256 dBm
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.
[root@localhost ~]# /sbin/iwlist eth0 scan
eth0 Interface doesn't support scanning.
I tried the last piece of code you put in, but no module was shown with "bcm". I don't fully understand a lot of this, but it seems like it's not even recognizing a wireless device? | |
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07-29-2009
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#6 (permalink)
| | Linux Guru
Join Date: Feb 2009 Location: Boston, MA
Posts: 2,198
| bcm would indicate it's a broadcom chipset, which historically has been very troublesome under linux. Broadcom released a linux driver for many of their cards, which some distros have started to include, (though it isn't open source, so many will not). bcm would also indicate it's the old deprecated open source driver, the new one being b43, but CentOS uses an old kernel and may still have the bcm43xx drivers.
Can you post the output of /sbin/lspci and /sbin/lsmod? | |
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07-29-2009
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#7 (permalink)
| | Super Moderator
Join Date: Oct 2004 Location: The Sovereign State of South Carolina
Posts: 4,136
| The command was for eth0 instead of etho0 but no matter... it appears CentOS is finding your wireless device as eth1. Do: Code: /sbin/iwlist eth1 scan
If you see access points then you might be able to get it going with: Code: /sbin/iwconfig eth1 essid name_of_access_point_you_want_to_connect_to
Then: Code: /sbin/dhclient eth1
If no errors... Code: /sbin/ifconfig eth1 up
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07-29-2009
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#8 (permalink)
| | Just Joined!
Join Date: Oct 2008
Posts: 11
| Well I got something called the NetworkManager up and running in the top right corner of the screen, tried adding my network name and WEP key but my signal strength is 0. I used to have XP installed on this with the same wireless card and it picked up the signal 75-100% strength, so I know it can't be that I'm too far away from the access point.
After running Code: /sbin/iwlist eth1 scan
I get the following output: Code: eth1 Interface doesn't support scaning : No such device
I tried your second suggestion of trying to manually add it and start it, but the terminal kept looping with something about send_packet: Network is down (I'd copy the whole thing to you, but I don't really have a way to get it off my desktop as it can't get online )
So I think it's working because my NetworkManager is running and I have the "use Wireless" box checked, it's just not picking up a wireless signal for some reason?
EDIT:
I don't know if this helps at all but I'm currently posting this from the exact same room as my desktop on my laptop running Ubuntu, so I'm sure the wireless signal can be reached from here. | |
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07-29-2009
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#9 (permalink)
| | Linux Guru
Join Date: Feb 2009 Location: Boston, MA
Posts: 2,198
| I think we should start from the beginning and determine the exact chipset of the card, that the correct driver is being used, etc.
Read the Wireless Setup page and post all the requested info, please. | |
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07-29-2009
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#10 (permalink)
| | Just Joined!
Join Date: Oct 2008
Posts: 11
| Ran through the BASH script, here's the results: Code: ============== lspci ============
00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 01)
00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)
01:04.0 Network controller: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)
01:05.0 Modem: Intel Corporation FA82537EP 56K V.92 Data/Fax Modem PCI (rev 04)
01:09.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev 01)
============== lsusb ============
Bus 001 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
============== lsmod ============
Module Size Used by
i915 23745 2
drm 65493 3 i915
autofs4 24517 2
hidp 23105 2
rfcomm 42457 0
l2cap 29505 10 hidp,rfcomm
bluetooth 53797 5 hidp,rfcomm,l2cap
sunrpc 144893 1
ip_conntrack_ftp 11697 0
ip_conntrack_netbios_ns 6977 0
ipt_REJECT 9537 1
xt_state 6209 11
ip_conntrack 53025 3 ip_conntrack_ftp,ip_conntrack_netbios_ns,xt_state
nfnetlink 10713 1 ip_conntrack
iptable_filter 7105 1
ip_tables 17029 1 iptable_filter
ip6t_REJECT 9409 1
xt_tcpudp 7105 28
ip6table_filter 6849 1
ip6_tables 18053 1 ip6table_filter
x_tables 17349 6 ipt_REJECT,xt_state,ip_tables,ip6t_REJECT,xt_tcpudp,ip6_tables
dm_multipath 22089 0
video 21193 0
sbs 18533 0
backlight 10049 1 video
i2c_ec 9025 1 sbs
button 10705 0
battery 13637 0
asus_acpi 19289 0
ac 9157 0
ipv6 258273 15 ip6t_REJECT
xfrm_nalgo 13765 1 ipv6
crypto_api 11969 1 xfrm_nalgo
lp 15849 0
floppy 57125 0
snd_intel8x0 35421 1
snd_ac97_codec 93025 1 snd_intel8x0
ac97_bus 6337 1 snd_ac97_codec
snd_seq_dummy 7877 0
snd_seq_oss 32577 0
snd_seq_midi_event 11073 1 snd_seq_oss
snd_seq 49585 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 11725 3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 42945 0
snd_mixer_oss 19009 1 snd_pcm_oss
snd_pcm 72005 3 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer 24517 2 snd_seq,snd_pcm
bcm43xx 415713 0
snd 52421 11 snd_intel8x0,snd_ac97_codec,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
i2c_i810 9285 0
ide_cd 40033 0
i2c_algo_bit 12489 1 i2c_i810
ieee80211softmac 33473 1 bcm43xx
cdrom 36705 1 ide_cd
soundcore 11553 1 snd
parport_pc 29157 1
i2c_i801 11597 0
b44 29005 0
ieee80211 33289 2 bcm43xx,ieee80211softmac
snd_page_alloc 14281 2 snd_intel8x0,snd_pcm
parport 37513 2 lp,parport_pc
i2c_core 23745 3 i2c_ec,i2c_algo_bit,i2c_i801
serio_raw 10693 0
pcspkr 7105 0
mii 9409 1 b44
ieee80211_crypt 10049 1 ieee80211
dm_snapshot 21477 0
dm_zero 6209 0
dm_mirror 29125 0
dm_mod 61405 9 dm_multipath,dm_snapshot,dm_zero,dm_mirror
ata_piix 22341 0
libata 143997 1 ata_piix
sd_mod 24897 0
scsi_mod 134605 2 libata,sd_mod
ext3 123593 2
jbd 56553 1 ext3
uhci_hcd 25421 0
ohci_hcd 23261 0
ehci_hcd 33357 0
============== dmesg-firmware ===========
============== kernel version ===========
2.6.18-92.el5
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