Wireless connectivity Issue

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Wireless connectivity Issue

Postby jwilwert » 2012/02/04 17:41:02

I am running Centos 5.4 on a HP laptop. I recienty upgraded my internet connection with ATT&T and they require that I use the new modem/router that came with the upgrade. Any wireless connnection issues I've had it the past, I've been able to work through - with help from the forum! THANKS!!
New modem/router - new connectivity issue!
I recognize the wireless network which ATT&T has setup - we'll call 2WIRE000
The 10 diget network key isn't working!
So, I set my wife's window's machine (also a HP laptop) next to mine, just to compare settings - the window's machine has no wireless network issues at all!
The windows machine uses the Network Authentication WPA2-PSK
The Linux machine is promping for WPA or WPA2. Is this the issue?
Also, the windows machine is ussing data encyption AES.
The Linux machine makes no mention of any encryption of the data.
Is this also an issue?

Many THANKS! in advance,
John Wilwert

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Wireless connectivity Issue

Postby pschaff » 2012/02/04 21:49:41

First, you should immediately update to the current release 5.7. 5.4 is seriously obsolete and has numerous known bugs and security issues that have been fixed in subsequent updates. Obsolete releases are not supported, nor is it advisable to be running them.

See the CentOS 5.6 Release Notes Section 4 for details on the recommended update procedure for such an old release, and CentOS 5.7 Release Notes for other information.

You should use WPA2 Personal if that's what the router is set up for. You also don't say how you are trying to configure the network. With a laptop NetworkManager is generally preferred.

If more help is needed after updating to a supported release, then please provide more information about your system by running "./getinfo.sh" and showing us the output file

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Re: Wireless connectivity Issue

Postby jwilwert » 2012/02/08 02:24:14

Thanks for your response and encouragement to get this issue resolved. First, Ii upgraded my system to release 5.7, as you had suggested. My issues, as I have descriped persist, so ran the ./getinfo.sh script and these are the results:
[~]$ cat /tmp/basedata.ra4052
Information for network problems.

Code: Select all

== BEGIN uname -rmi ==
2.6.18-274.17.1.el5 i686 i386
== END   uname -rmi ==

== BEGIN rpm -qa \*-release\* ==
== END   rpm -qa \*-release\* ==

== BEGIN cat /etc/redhat-release ==
CentOS release 5.7 (Final)
== END   cat /etc/redhat-release ==

== BEGIN getenforce ==
== END   getenforce ==

== BEGIN free -m ==
             total       used       free     shared    buffers     cached
Mem:           502        482         19          0         22        301
-/+ buffers/cache:        158        343
Swap:         1023          0       1023
== END   free -m ==

== BEGIN lspci -nn ==
00:00.0 Host bridge [0600]: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub Interface [8086:2570] (rev 02)
00:01.0 PCI bridge [0604]: Intel Corporation 82865G/PE/P PCI to AGP Controller [8086:2571] (rev 02)
00:1d.0 USB Controller [0c03]: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 [8086:24d2] (rev 02)
00:1d.1 USB Controller [0c03]: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 [8086:24d4] (rev 02)
00:1d.2 USB Controller [0c03]: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 [8086:24d7] (rev 02)
00:1d.7 USB Controller [0c03]: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller [8086:24dd] (rev 02)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev c2)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge [8086:24d0] (rev 02)
00:1f.1 IDE interface [0101]: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller [8086:24db] (rev 02)
00:1f.5 Multimedia audio controller [0401]: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller [8086:24d5] (rev 02)
00:1f.6 Modem [0703]: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Modem Controller [8086:24d6] (rev 02)
01:00.0 VGA compatible controller [0300]: nVidia Corporation NV34M [GeForce FX Go5200 64M] [10de:0324] (rev a1)
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ [10ec:8139] (rev 10)
02:01.0 CardBus bridge [0607]: ENE Technology Inc CB-710/2/4 Cardbus Controller [1524:1411] (rev 02)
02:01.1 FLASH memory [0501]: ENE Technology Inc CB710 Memory Card Reader Controller [1524:0510]
02:02.0 FireWire (IEEE 1394) [0c00]: Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link) [104c:8026]
02:03.0 Network controller [0280]: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller [14e4:4320] (rev 03)
== END   lspci -nn ==

== BEGIN lsusb ==
Bus 001 Device 002: ID 059b:0472 Iomega Corp.
Bus 001 Device 001: ID 0000:0000 
Bus 003 Device 001: ID 0000:0000 
Bus 003 Device 002: ID 0461:4d5a Primax Electronics, Ltd
Bus 004 Device 001: ID 0000:0000 
Bus 002 Device 001: ID 0000:0000 
== END   lsusb ==

== BEGIN rpm -qa kmod\* kmdl\* ==
== END   rpm -qa kmod\* kmdl\* ==

== BEGIN ifconfig -a ==
eth0      Link encap:Ethernet  HWaddr 00:C0:9F:3C:86:96 
          inet addr:  Bcast:  Mask:
          RX packets:3442 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2766 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3179302 (3.0 MiB)  TX bytes:370476 (361.7 KiB)
          Interrupt:217 Base address:0x6800

eth1      Link encap:Ethernet  HWaddr 00:90:4B:54:3F:70 
          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:209 Memory:d2004000-d2006000

lo        Link encap:Local Loopback 
          inet addr:  Mask:
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:35 errors:0 dropped:0 overruns:0 frame:0
          TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3833 (3.7 KiB)  TX bytes:3833 (3.7 KiB)

== END   ifconfig -a ==

== BEGIN brctl show ==
./getinfo.sh: line 87: brctl: command not found
== END   brctl show ==

== BEGIN route -n ==
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface   U     0      0        0 eth0     U     0      0        0 eth0         UG    0      0        0 eth0
== END   route -n ==

== BEGIN cat /etc/resolv.conf ==
; generated by /sbin/dhclient-script
search gateway.2wire.net
== END   cat /etc/resolv.conf ==

== BEGIN grep net /etc/nsswitch.conf ==
#networks:   nisplus [NOTFOUND=return] files
#netmasks:   nisplus [NOTFOUND=return] files     
netmasks:   files
networks:   files
netgroup:   nisplus
== END   grep net /etc/nsswitch.conf ==

== BEGIN chkconfig --list | grep -Ei 'network|wpa' ==
NetworkManager  0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
wpa_supplicant  0:off   1:off   2:off   3:off   4:off   5:off   6:off
== END   chkconfig --list | grep -Ei 'network|wpa' ==

So, Phil, I am hoping that from the above info you can help me log on to my new ATT&T account. I have successfuly used the NetworkManager in the past and hopefully it will be useful agin. If any additional info in needed, please let me know.

John Wilwert

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Re: Wireless connectivity Issue

Postby AlanBartlett » 2012/02/08 03:24:17

I'm assuming that your new modem/router/wap, with which you have been provided, is a 2Wire 2700HG-B.

The first thing to do is to confirm that it is configured correctly. Use a wired connection and via your web-browser, go to this page -- ... XTPAGE=C05

Carefully check the settings. If necessary, take the option to reset to the default and then re-configure.

Under the Identify Network heading, set the Network Name to your choice, the Wireless Channel to "Auto" and, for the moment, enable SSID Broadcast. (Once you have got wireless access operating, you can turn off the SSID Broadcast, if you so wish.)

Under the Wireless Security heading, enable Wireless Network Security, set Authentication to "WPA-PSK and WPA2-PSK" and Use Custom Pass Phrase.

Skip, for now, the section under the MAC Filtering heading. You can enable that later. For the Additional Settings, accept the defaults.

Remember to click on "Save".

Now turn your attention to the system you wish to connect via the WAP. I shall assume it is a laptop computer, fully up to date and running CentOS 5.7. Turn off the network service and turn on the NetworkManager. Ensure that the wpa_supplicant service is also off. Ensure that any switch or button has been operated on the hardware to allow the WiFi adaptor to activate. Make sure that you have the appropriate firmware installed, if required.

Code: Select all

[b]for S in network wpa_supplicant; do service $S stop; chkconfig --level 0123456 off; done
chkconfig --level 2345 NetworkManager on
service NetworkManager start[/b]

It might be an idea to re-boot the laptop, at this point.

Assuming you are using a Gnome desktop, you should now see an icon at the top right of the screen. It is supposed to represent a lead and RJ45 plug . . . to some people they think it looks like a mouse icon! Right click on it and take the option to set up a new wireless network. Follow it through carefully . . . entering all the details, as discussed in the 2Wire modem/router/wap configuration, above. Remember to save the settings.

It will work, I can promise you that -- I use both wired & wireless connections for my laptop (dual boot, RHEL 6.2 & CentOS 5.7) and a wired connection for my workstation (CentOS 5.7) via a 2WIre 2700HG[-B] modem/router/wap device. :-)

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Re: Wireless connectivity Issue

Postby jwilwert » 2012/02/12 17:44:23

MEGA THANKS! for your help. Yes, I do have my wireless connection working - and I am a little concerned as I did not follow the exact procedure you had suggested. First, my modem/router is a 3800HGV-B, which sounds very similar to your model. Realy, no issues there.

I set the Wireless Name, the Wireless Channel and kept the SSID Broadcast enabled, all as you suggested. I chose different settings for the Wireless Security settings and this is my greatest concern. I chose to disable the wireless security and enable MAC filtering. I guess I've placed all my security eggs in one basket- MAC filtering. Is this a good idea? Also, if I disable the broadcast of the SSID, wil by network be more secure?

Any insights will be very helpful.

Again, THANK YOU!!!!
John Wilwert

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Re: Wireless connectivity Issue

Postby AlanBartlett » 2012/02/12 18:58:43

I'm pleased to read that you now have a working WiFi connection.

Ah, I had forgotten that a 2Wire 3800HGV-B would be a more current AT&T issue but as I am not US based, I hope the reason is understood. ;-)

Now that you have got the wireless basics working, I would certainly advise turning off the broadcasting of the SSID. You know that your network is present and its name. Why tell everyone else?

As for system security, I use both WPA2-PSK and MAC filtering . . . As things presently stand, someone would have to know and then spoof the MAC of one of your devices to gain network access. Again you should now find it easy to implement the pre-shared key (PSK) security method, if you are so inclined.