no internet after fresh installation of 13.1

Massimo33 · February 8, 2014, 3:22pm

I have installed it on the desktop from image dvd
No wired internet connection.

below is the output of some relevant commands


# ifconfig -a
em1       Link encap:Ethernet  HWaddr F8:B1:56:A7:1A:94  
          inet addr:143.239.109.117  Bcast:143.239.109.255  Mask:255.255.255.0
          inet6 addr: fe80::fab1:56ff:fea7:1a94/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1761 errors:0 dropped:0 overruns:0 frame:0
          TX packets:511 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:246632 (240.8 Kb)  TX bytes:68473 (66.8 Kb)
          Interrupt:20 Memory:f7c00000-f7c20000 

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:65536  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:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         143.239.109.254 0.0.0.0         UG        0 0          0 em1
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
143.239.109.0   0.0.0.0         255.255.255.0   U         0 0          0 em1

I do not quite understand why I see two em1 interfaces and why information about ip s is different from ifconfig


# lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller [8086:0150] (rev 09)
    Subsystem: Dell Device [1028:0577]
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: i915
    Kernel modules: i915
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: xhci_hcd
    Kernel modules: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: mei_me
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
    Subsystem: Dell Device [1028:052c]
    Kernel driver in use: e1000e
    Kernel modules: e1000e
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: ehci-pci
00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: ehci-pci
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev a4)
00:1f.0 ISA bridge [0601]: Intel Corporation Q77 Express Chipset LPC Controller [8086:1e47] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: lpc_ich
    Kernel modules: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e02] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)
    Subsystem: Dell Device [1028:0577]
    Kernel modules: i2c_i801

what I tried to do was to switch between ifup and NetworkManager. no result.
reboots after the installation did not help.
I can not ping any ip.
I use gnome and do not see network manager applet, its sign appears shortly after switching from ifup to network manager and then disappears.

roberto68 · February 8, 2014, 8:35pm

no errors (RX, TX) seems allright. Is143.239.109.254 your router or server you connect to WAN ? I assume you use network manager try to look if dhcp is running if you can for example ping this forum or download
updates (maybe some DNS issue )

Massimo33 · February 8, 2014, 9:09pm

thank you for reply, though I do not quite get what you suggest. As I said I can not ping any ip. ip you mention should be a server.

Any other ideas?

lwfinger · February 8, 2014, 9:33pm

On 02/08/2014 08:26 AM, Massimo33 wrote:

> Code:
> --------------------
>
> # netstat -rn
> Kernel IP routing table
> Destination Gateway Genmask Flags MSS Window irtt Iface
> 0.0.0.0 143.239.109.254 0.0.0.0 UG 0 0 0 em1
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
> 143.239.109.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
>
> --------------------
>
>
> I do not quite understand why I see two em1 interfaces and why
> information about ip s is different from ifconfig

Those are two different rules, not two interfaces. The second one tells the
em1 route to addresses 143.239.109.*. With that rule in hand, you can get to
143.239.109.254. The first of the rules shows that to get to all other IP
addresses, one needs to use 143.239.109.254.

I am a little confused about your IP number. Please tell us more about the
configuration.

Massimo33 · February 8, 2014, 10:34pm

lwfinger:

On 02/08/2014 08:26 AM, Massimo33 wrote:

> Code:
> --------------------
>
> # netstat -rn
> Kernel IP routing table
> Destination Gateway Genmask Flags MSS Window irtt Iface
> 0.0.0.0 143.239.109.254 0.0.0.0 UG 0 0 0 em1
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
> 143.239.109.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
>
> --------------------
>
>
> I do not quite understand why I see two em1 interfaces and why
> information about ip s is different from ifconfig

Those are two different rules, not two interfaces. The second one tells the
em1 route to addresses 143.239.109.*. With that rule in hand, you can get to
143.239.109.254. The first of the rules shows that to get to all other IP
addresses, one needs to use 143.239.109.254.

I am a little confused about your IP number. Please tell us more about the
configuration.

ok, what information exactly would be useful?

lwfinger · February 8, 2014, 11:38pm

On 02/08/2014 03:36 PM, Massimo33 wrote:
>
> lwfinger;2623248 Wrote:
>> On 02/08/2014 08:26 AM, Massimo33 wrote:
>>
>>> Code:
>>> --------------------
>>>
>>> # netstat -rn
>>> Kernel IP routing table
>>> Destination Gateway Genmask Flags MSS Window
>> irtt Iface
>>> 0.0.0.0 143.239.109.254 0.0.0.0 UG 0 0
>> 0 em1
>>> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0
>> 0 lo
>>> 143.239.109.0 0.0.0.0 255.255.255.0 U 0 0
>> 0 em1
>>>
>>> --------------------
>>>
>>>
>>> I do not quite understand why I see two em1 interfaces and why
>>> information about ip s is different from ifconfig
>>
>> Those are two different rules, not two interfaces. The second one
>> tells the
>> em1 route to addresses 143.239.109.*. With that rule in hand, you can
>> get to
>> 143.239.109.254. The first of the rules shows that to get to all other
>> IP
>> addresses, one needs to use 143.239.109.254.
>>
>> I am a little confused about your IP number. Please tell us more about
>> the
>> configuration.
>
> ok, what information exactly would be useful?

Why do you have a class C address on your box? Are you connected directly to the
modem without a home router? Most of us have an access point/router in the
middle and are given a non-routing 192.168.X.Y address.

Massimo33 · February 9, 2014, 1:42pm

this a campus network, so I am not sure of its configuration, but everything works well for nearby computers. The question is are there any means in linux to diagnose the problem?
and what these means are? from the information I provided looks like ok, but I am far from being expert.

roberto68 · February 9, 2014, 2:45pm

maybe you coudl try to reintall networkmanager

zypper -f install networkmanager

and maybe try to set statci route via yast->network devices-> set some DNS servers here are some [CODE[i]Google Public DNS: 8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844 info]
OpenDNS: 208.67.222.222, 208.67.220.220 info]
Norton DNS: 198.153.192.1, 198.153.194.1 info]
DNS Advantage: 156.154.70.1, 156.154.71.1 ]

 try different gateway maybe 109.1, 109.0 or 109.255 and set IP forwarding

robin_listas · February 9, 2014, 4:28pm

On 2014-02-09 13:46, Massimo33 wrote:

> this a campus network, so I am not sure of its configuration, but
> everything works well for nearby computers.

Then you should compare your configuration to those. And probably
contact the campus IT staff. On some sites, you need some kind of
authorization procedure.

> The question is are there
> any means in linux to diagnose the problem?
> and what these means are? from the information I provided looks like ok,
> but I am far from being expert.

Start with pinging yourself (143.239.109.117), and then the gateway
(143.239.109.254). Then pinging google (by IP, not name).

–
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 “Bottle” (Minas Tirith))

Massimo33 · February 9, 2014, 7:14pm

roberto68:

maybe you coudl try to reintall networkmanager
zypper -f install networkmanager
and maybe try to set statci route via yast->network devices-> set some DNS servers here are some [CODE[i]Google Public DNS: 8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844 info]
OpenDNS: 208.67.222.222, 208.67.220.220 info]
Norton DNS: 198.153.192.1, 198.153.194.1 info]
DNS Advantage: 156.154.70.1, 156.154.71.1 ]
 try different gateway maybe 109.1, 109.0 or 109.255 and set IP forwarding

how to reinstall nm if I do not have internet connection?
tried to add other DNS - no change

Massimo33 · February 9, 2014, 7:15pm

campus IT support only windows.
I can ping my ip, I can ping the gateway, but not other ip’s

deano_ferrari · February 9, 2014, 7:26pm

Many campus networks will present an authentication page before allowing you to browse non-campus web sites, or connect to external services. Perhaps that is the issue.

lwfinger · February 9, 2014, 7:27pm

On 02/09/2014 12:16 PM, Massimo33 wrote:

> campus IT support only windows.
> I can ping my ip, I can ping the gateway, but not other ip’s

It seems you have a connection to the college network, but routing is not
working correctly. That is strange, as the routing table looked correct. Please
show the output of ‘ping -c5 8.8.8.8’. Perhaps that will provide a clue.

Did you obtain your IP using DHCP, or is that a static IP assigned by the college?

Massimo33 · February 9, 2014, 9:16pm

through DHCP.

the output of ping -c5 8.8.8.8 is that 100% of packets is lost

Massimo33 · February 9, 2014, 9:17pm

does that mean that without authentification page ( if any ) I can not ping ip addresses?

deano_ferrari · February 9, 2014, 9:40pm

If this is the case, I would guess so. They often employ a redirect to an authentication page until you’ve registered. If you open a browser, do you see such a page?

robin_listas · February 9, 2014, 10:08pm

On 2014-02-09 21:26, Massimo33 wrote:
>
> deano_ferrari;2623436 Wrote:
>> Many campus networks will present an authentication page before allowing
>> you to browse non-campus web sites, or connect to external services.
>> Perhaps that is the issue.
>
> does that mean that without authentification page ( if any ) I can not
> ping ip addresses?

Absolutely.

Your network is correctly set, as you can ping the gateway. Your campus
IT people is intentionally blocking you from accessing outside, so it is
they who have to support you. Request they be fired.

Some sites only allow internet browsing via proxy, meaning no any other
type of access outside except hhtp, and via their proxy and filters.
Perhaps looking at another computer running Windows and looking how the
proxy is setup, you can replicate the same thing.

–
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 “Bottle” (Minas Tirith))

roberto68 · February 13, 2014, 9:39am

if they cannot provide you the help (the IT support), ask friend to download TOR for you, that will work and no authentication will be needed for sure:D

Massimo33 · February 13, 2014, 11:36am

currently, the problem looks like this

I can surf and ping intranet i.e. the pages inside the campus network.
I can ping both my own ip and the gateway.
I can not ping neither outer ip s nor surf outer web-pages.
Just in case I reinstalled opensuse. no change.
As it was a fresh installation I removed opensuse and installed ubuntu. no change (also could not ping outer world), so I returned to opensuse.

Putting aside for a moment what IT say, the question is: can it be something on my side that I did wrong or missed to configure the network?

the next question is, what CAN BE wrong on their side?

robin_listas · February 13, 2014, 1:48pm

On 2014-02-13 09:46, roberto68 wrote:
>
> if they cannot provide you the help (the IT support), ask friend to
> download TOR for you, that will work and no authentication will be
> needed for sure:D

How would that work, if he can not even ping outside addresses?

It would only work if there are TOR providers inside the intranet, and
he connects to/via them.

–
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 “Bottle” (Minas Tirith))