Problem with CentOS 6 configuring network
Bryan O'Neal
Bryan.ONeal at TheONealAndAssociates.com
Thu Sep 22 20:20:17 MST 2011
Few things. 1) Disable IPv6. 2) try IP only connections. First try
pinging the loopback, then the address of the local box, the the
gateway, then another machine on the network then an external site,
like 4.2.2.2 Then try using a name like news.google.com. This will
tell you where things get mucked up.
Let us know the results and we can help further.
On 9/22/11, Eric Shubert <ejs at shubes.net> wrote:
> Try a live Ubuntu 11.04? Might it have just bit the dust recently?
>
> --
> -Eric 'shubes'
>
> On 09/22/2011 06:43 PM, James Dugger wrote:
>> Phil,
>>
>> Yeah, I tried Firefox. it can't find google or any other outside URL.
>> Going back through the screen response when bringing the networking
>> back up it references the line -- Active connection path:
>> /org/freedesktop/NetwokManager/ActiveConnection/2 state: activated --
>>
>> I tried to find this directory and can't get there as root as well.
>> Don't know if it exists.
>>
>> I have just ran Ubuntu 11.04 on this system just yesterday without a
>> networking problem. I have also run Fedora 15 on it was well -- no
>> problems .. with network card. I loaded the live CD for Open SUSE 11.4
>> and noticed in running the live CD it also did not give me access to the
>> network. I wonder if there is a security setting or firewall setting
>> that is effecting connection. All other computers have access to the
>> router gateway and the internet.
>>
>> ???
>>
>> On Thu, Sep 22, 2011 at 6:02 PM, Phillip Waclawski <waclawski at mesacc.edu
>> <mailto:waclawski at mesacc.edu>> wrote:
>>
>> bizarre. Looking through that, it would appear you DO have an
>> internet connection. Have you tried firefox etc? My only guess is
>> that your access point is blocking something as what you've shown me
>> seems to indicate all good.
>> Phil W.
>>
>>
>> ------------------------------------------------------------------------
>> *From: *"James Dugger" <james.dugger at gmail.com
>> <mailto:james.dugger at gmail.com>>
>> *To: *"PLUG-Discuss" <plug-discuss at lists.plug.phoenix.az.us
>> <mailto:plug-discuss at lists.plug.phoenix.az.us>>
>> *Sent: *Thursday, September 22, 2011 5:57:04 PM
>> *Subject: *Problem with CentOS 6 configuring network
>>
>>
>> I have tried to install CentOS 6 on an older system. When I get to
>> the prompt screen for the hostname of the computer there is a
>> configure network button at the bottom of the screen which is non
>> selectable. After filling in the hostname for the machine the
>> configure network button is still unelectable. Without being able
>> to select the button I continued and completed the installation of
>> the CentOS 6 on the system, but when done with installation I have
>> no internet connection.
>>
>> I see the network connection icon in the upper right hand corner of
>> the status bar in Gnome, and when I right click edit connections, I
>> see Auto eth0 in the connections screen last used is never. When I
>> highlight it and click edit I can see a MAC address listed. in IPv4
>> and in IPv6 method is set to Automatic (DHCP). Connect
>> Automatically box is checked and it is available to all users.
>> Still no internet connection
>>
>> ifconfig gives the following info:
>>
>> eth0
>>
>> Link encap:Ethernet HWaddr: 00:13:20:BF:DA:56
>> inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0
>> inet6 addr: fe88::213:20ff:febf:da56/64 Scope:Link
>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>> RX packets:721 errors:0 dropped:0 overruns:0 frame:0
>> TX packets:222 errors:0 dropped:0 overruns:) carrier:0
>> collisions:0 txqueuelen:1000
>> RX bytes:59817 (58.4 KiB) TX bytes:21873 (21.3 KiB)
>> Interrupt:16
>>
>> lo
>>
>> Link encap:Local Loopback
>> inet addr:127.0.0.1 Mask 255.0.0.0
>> inet6 addr: ::1/128 Scope:Host
>> UP LOOPBACK RUNNING MTU:16436 Mertric:1
>> RX packets:12 errors:0 dropped:0 overruns:0 frame:0
>> TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
>> collisions:0 txqueuelen:0
>> RX bytes:720 (720.0 b) TX bytes:720 (720.0 b)
>>
>> ------------
>>
>> resolve.conf has the following:
>>
>> # Generated by NetworkManager
>> nameserver 192.168.0.1
>>
>> (the IP address listed in resolve.conf is my router's gateway address)
>>
>> There was no ifcfg-eth0 file created in
>> /etc/sysconfig/netwroking/devices so I created one and put the
>> following in it:
>>
>> DEVICE=eth0
>> BOOTPROTO=none
>> HWADDR=00:13:20:BF:DA:56
>> ONBOOT=yes
>> TYPE=Ethernet
>> USERCTL=no
>> IPV6INIT=no
>> PEERDNS=yes
>> NETMASK=255.2555.255.0
>> IPADDR=192.168.0.10
>> GATEWAY=192.168.0.1
>>
>> --------
>>
>> after this I have brought eth0 down and back up using if down eth0
>> and ifup eth0
>>
>> I get an OK on the following:
>>
>> Shutting down loopback interface:
>> Bringing up loopback interface:
>> Bringing up interface Auto_eth0: Active connection state: activating
>> Active connection path:
>> /org/freedesktop/NetwokManager/ActiveConnection/2 state: activated
>> Connection activated
>>
>> Still no internet connection. Please help, Thanks
>>
>> --
>> James
>>
>>
>>
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>>
>>
>> --
>> James
>>
>>
>
>
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