network issues

[Bucky Ball]

SeijiSensei, it looks like the code did not make it in.

? How do you mean 'did not make it in'? You just want the command, not the ". Copy and paste the following:

route -n

You may need to use:

sudo route -n

[Kanefa]

Here are the results for steeldriver and TheFu. To be clear I removed the router I was borrowing. I am directly connected into the University's network. The Windows' results are in French. Sorry, this is just one reason we are moving to Lubuntu (I teach in the English Department).

ifconfig - Lubuntu

administrator@DEAA:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0d:56:51:c7:3f  
          inet addr:192.168.2.27  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::20d:56ff:fe51:c73f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2104 errors:0 dropped:0 overruns:0 frame:0
          TX packets:252 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:414397 (414.3 KB)  TX bytes:24555 (24.5 KB)
          Interrupt:17 

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:407 errors:0 dropped:0 overruns:0 frame:0
          TX packets:407 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:29371 (29.3 KB)  TX bytes:29371 (29.3 KB)

ipconfig /all - Windows

C:\Documents and Settings\Administrateur>ipconfig /all

Configuration IP de Windows

        Nom de l'hÙte . . . . . . . . . . : dell01
        Suffixe DNS principal . . . . . . :
        Type de noud . . . . . . . . . . : Inconnu
        Routage IP activÈ . . . . . . . . : Non
        Proxy WINS activÈ . . . . . . . . : Non
        Liste de recherche du suffixe DNS : local-antsiranana.mg

Carte Ethernet Connexion au rÈseau local:

        Suffixe DNS propre ‡ la connexion : local-antsiranana.mg
        Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Cont
roller
        Adresse physique . . . . . . . . .: 00-0D-56-51-C7-8B
        DHCP activÈ. . . . . . . . . . . : Oui
        Configuration automatique activÈe . . . . : Oui
        Adresse IP. . . . . . . . .†. . . : 192.168.11.128
        Masque de sous-rÈseau . . .†. . . : 255.255.255.0
        Passerelle par dÈfaut . . .†. . . : 192.168.11.1
        Serveur DHCP. . . . . . . . . . . : 192.168.11.1
        Serveurs DNS . . . . . . . . . .  : 192.168.11.30
                                            196.192.32.5
        Bail obtenu . . . . . . . .†. . . : vendredi 25 octobre 2013 14:57:01
        Bail expirant . . . . . . .†. . . : vendredi 25 octobre 2013 16:57:01

route - Lubuntu

administrator@DEAA:~$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.2.1     0.0.0.0         UG    0      0        0 eth0
192.168.2.0     *               255.255.255.0   U     1      0        0 eth0

route print - Windows

C:\Documents and Settings\Administrateur>route print
===========================================================================
Liste d'Interfaces
0x1 ........................... MS TCP Loopback interface
0x2 ...00 0d 56 51 c7 8b ...... Broadcom 440x 10/100 Integrated Controller - Min
iport d'ordonnancement de paquets
===========================================================================
===========================================================================
ItinÈraires actifs†:
Destination rÈseau    Masque rÈseau  Adr. passerelle   Adr. interface MÈtrique
          0.0.0.0          0.0.0.0     192.168.11.1  192.168.11.128       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      169.254.0.0      255.255.0.0   192.168.11.128  192.168.11.128       20
     192.168.11.0    255.255.255.0   192.168.11.128  192.168.11.128       20
   192.168.11.128  255.255.255.255        127.0.0.1       127.0.0.1       20
   192.168.11.255  255.255.255.255   192.168.11.128  192.168.11.128       20
        224.0.0.0        240.0.0.0   192.168.11.128  192.168.11.128       20
  255.255.255.255  255.255.255.255   192.168.11.128  192.168.11.128       1
Passerelle par dÈfaut†:      192.168.11.1
===========================================================================
ItinÈraires persistants†:
  Aucun

dig google.com - Lubuntu

administrator@DEAA:~$ dig google.com

; <<>> DiG 9.9.2-P1 <<>> google.com
;; global options: +cmd
;; connection timed out; no servers could be reached

nslookup google.com - Windows

C:\Documents and Settings\Administrateur>nslookup google.com
DNS request timed out.
    timeout was 2 seconds.
*** Impossible de trouver le nom de serveur pour l'adresse 192.168.11.30 : Timed
 out
DNS request timed out.
    timeout was 2 seconds.
*** Impossible de trouver le nom de serveur pour l'adresse 196.192.32.5 : Timed
out
*** Les serveurs par dÈfaut ne sont pas disponibles
Serveur :  UnKnown
Address:  192.168.11.30

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Le dÈlai de la requÍte sur UnKnown est dÈpassÈ

[TheFu]

Thanks. Don't have time to do more than skim today...

Linux is being put on a different subnet than Windows. Can you explain that?

External DNS didn't work on either host - I'd guess this is due to a proxy - which is smart by your network admins. Don't let any desktop have DNS access to the outside world - only the proxy server does.

         Linux            Win
IP       192.168.2.27     192.168.11.128
Netmask  255.255.255.0    255.255.255.0
Gateway  192.168.2.1      192.168.11.1
DNS Srv  none             192.168.11.30

See the differences? You'll need to talk with the network - AD - DHCP guys to get this fixed on their side. Getting the internet proxy settings would be smart too.

[Kanefa]

? How do you mean 'did not make it in'? You just want the command, not the ". Copy and paste the following:

route -n

I misread the instructions as run "route -n" as used in the code tags. I tried this yesterday, but the Lubuntu computer was unable to see the network at all when using the router. I have no explanation why. I was going to wait a bit and try again, but I had to give back the router which was unfortunate.

[TheFu]

I misread the instructions as run "route -n" as used in the code tags. I tried to this yesterday, but the Lubuntu computer was unable to see the network at all when using the router. I have no explanation why. I was going to wait a bit and try again, but I had to give back the router which was unfortunate.

You've already provided the same data above. Don't worry about it. You need to find out why the Windows PC and the Linux PC are on 2 different subnets. Are both using DHCP or have you tried setting, unused, static IPs?

[Kanefa]

Thanks. Don't have time to do more than skim today...

Linux is being put on a different subnet than Windows. Can you explain that?

External DNS didn't work on either host - I'd guess this is due to a proxy - which is smart by your network admins. Don't let any desktop have DNS access to the outside world - only the proxy server does.

         Linux            Win
IP       192.168.2.27     192.168.11.128
Netmask  255.255.255.0    255.255.255.0
Gateway  192.168.2.1      192.168.11.1
DNS Srv  none             192.168.11.30

See the differences? You'll need to talk with the network - AD - DHCP guys to get this fixed on their side. Getting the internet proxy settings would be smart too.

Thanks for the response, I really appreciate you looking over it. I cannot explain why the two computers are being put on different subnets. To be clear we are referring to 192.168.2 vs 192.168.11. When you say "see the differences" I assume you are referring just to the subnet issue and nothing else. If that is the case I do see that and will to take it to my network admin. Looking at my Mac I notice it also has the same subnet as the Windows machine. I'm curious as to why the Lubuntu machines would be put onto a different subnet then the Windows and Macs. Any thoughts?

Also, why would getting the internet proxy settings be helpful in my case?

[The Cog]

The first step is to find out how the Lubuntu network is configured.

It may be configured from a static configuration file, so let's check that. Please post the content of the file /etc/network/interfaces.
There is probably no mention of eth0 in the file, but it helps to be sure.

Also, please post the contents of /etc/NetworkManager/NetworkManager.conf. I'm not sure what it all means, but others here will, and it may be significant.

There must be a GUI network configuration utility somewhere in Lubuntu. Sorry, I'm not familiar with Lubuntu, but I attach a screenshot of the kind of thing I'm looking for - this is from Xubuntu. Can you find anything similar and post the configuration?

Also, please try this command thich tries to ask the network for a DHCP address, and post the output. Does this command make the internet work?

sudo dhclient -v eth0

[steeldriver]

The first thing I'd do in a university / work network is talk to the network admins - these kinds of environments often use MAC address whitelists, meaning that the DHCP server only gives out IP addresses to computers it "knows". Hard to explain where it's getting the 192.168.2.xxx address - as The Cog says, it may be a static assignment.

[Kanefa]

/etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).


# The loopback network interface
auto lo
iface lo inet loopback


# The primary network interface
#NetworkManager#auto eth0
#NetworkManager#iface eth0 inet dhcp

/etc/NetworkManager/NetworkManager.conf

[main]
plugins=ifupdown,keyfile
dns=dnsmasq


[ifupdown]
managed=false

sudo dhclient -v eth0

administrator@DEAA:/$ sudo dhclient -v eth0
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/


Listening on LPF/eth0/00:0d:56:51:c7:3f
Sending on   LPF/eth0/00:0d:56:51:c7:3f
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x6fce155a)
DHCPREQUEST of 192.168.2.27 on eth0 to 255.255.255.255 port 67 (xid=0x6fce155a)
DHCPOFFER of 192.168.2.27 from 192.168.2.1
DHCPNAK from 192.168.11.1 (xid=0x6fce155a)
DHCPACK of 192.168.2.27 from 192.168.2.1
RTNETLINK answers: File exists
bound to 192.168.2.27 -- renewal in 563222 seconds.

The first thing I'd do in a university / work network is talk to the network admins - these kinds of environments often use MAC address whitelists, meaning that the DHCP server only gives out IP addresses to computers it "knows". Hard to explain where it's getting the 192.168.2.xxx address - as The Cog says, it may be a static assignment.

At some point I will have to get in touch with him, but I've been trying for over a month now. Even when I do manage to corner him, we are going to speak two different languages. That being said they have no knowledge of my Mac laptop or any of the other volunteers' computers and they all work (we all have Mac or Window laptops).

[SeijiSensei]

# The primary network interface
#NetworkManager#auto eth0
#NetworkManager#iface eth0 inet dhcp

Remove the "#NetworkManager#" comments from each line so they read

# The primary network interface
auto eth0
iface eth0 inet dhcp

That will tell the system to obtain a DHCP address just like you did manually with dhclient. Now run "sudo service networking restart" and then "ifconfig" and see if you get back the same address, or at least some address in 192.168.2.0/24.