Re: Problem with CentOS 6 configuring network

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Author: James Dugger
Date:  
To: Main PLUG discussion list
Subject: Re: Problem with CentOS 6 configuring network
Bryan,

From terminal I am able to ping the loopback, local machine, an iMac on my
system, the router, 4.2.2.2, and news.google.com.

Also when I put in the gateway address to the router in Firefox I can bring
up the router admin page.

So I don't think it is the braodcom card.

I sent the following $ ping -c4 ip-address, and each time I get back

4 packets transmitted, 4 received, 0% packet loss, time (ranged from 29 ms
to 3034 ms)

a typical line: " 64 bytes from 4.2.2.2: icmp_seq=1 ttl=58 time=30.5 ms "

???


On Thu, Sep 22, 2011 at 8:20 PM, Bryan O'Neal <
> wrote:

> 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 <> 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 <
>
> >> <mailto:waclawski@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" <
> >>     <mailto:james.dugger@gmail.com>>
> >>     *To: *"PLUG-Discuss" <
> >>     <mailto:plug-discuss@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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> --
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--
James
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