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Thread: Problems setting up network from ubuntu server 12.04

  1. #1
    Join Date
    Mar 2013
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    5

    Problems setting up network from ubuntu server 12.04

    I have installed Ubuntu Server 12.04 onto my server. As I have no understanding of the Ubuntu Server command line interface - I have installed KDE to aid in setup. (I previously had suse linux enterprise server on the server).

    I have two wired network cards in the server - one at eth0, the other at eth1.

    eth0 is the one where the internet comes into and is set to Auto DHCP and works fine bringing the internet into the server.

    eth1 is the one that connects to my windows box. I have tried to use the settings from the previous suse install - ip address, subnet mask (gateway - what should this be), dns servers & search domains but to no avail - there mut be something I am missing.

    The settings are the same as they were on suse, the settings have not changed on the windows box.

    HELP!!!

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,251
    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: Problems setting up network from ubuntu server 12.04

    Please show the terminal outputs of
    Code:
    lspci -nnk | grep -iA2 net
    cat /etc/udev/rules.d/70-persistent-net.rules
    ifconfig -a
    lsmod
    cat /etc/network/interfaces
    cat /etc/resolv.conf
    cat /etc/NetworkManager/NetworkManager.conf

  3. #3
    Join Date
    Mar 2013
    Beans
    5

    Re: Problems setting up network from ubuntu server 12.04

    How do I get this information?

  4. #4
    Join Date
    Mar 2013
    Beans
    40

    Re: Problems setting up network from ubuntu server 12.04

    Just type these commands into the server's terminal (command line).

  5. #5
    Join Date
    Mar 2013
    Beans
    5

    Re: Problems setting up network from ubuntu server 12.04

    00:07.0 Bridge [0680]: NVIDIA Corporation MCP61 Ethernet [10de:03ef] (rev a2)
    Subsystem: ASRock Incorporation 939NF6G-VSTA Board [1849:03ef]
    Kernel driver in use: forcedeth
    --
    01:08.0 Ethernet controller [0200]: National Semiconductor Corporation DP83815 (MacPhyter) Ethernet Controller [100b:0020]
    Subsystem: Netgear Device [1385:f331]
    Kernel driver in use: natsemi
    Kernel modules: natsemi

    ifconfig -a
    eth0 Link encap:Ethernet HWaddr 00:40:f4:59:3b:4d
    inet6 addr: fe80::240:f4ff:fe59:3b4d/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:15145 errors:0 dropped:0 overruns:0 frame:0
    TX packets:8407 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:997908 (997.9 KB) TX bytes:1863017 (1.8 MB)

    eth1 Link encap:Ethernet HWaddr 00:19:66:0b:d5:2c
    inet addr:192.168.1.104 Bcast:192.168.1.255 Mask:255.255.255.0
    inet6 addr: fe80::219:66ff:fe0b:d52c/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:50702 errors:0 dropped:0 overruns:0 frame:0
    TX packets:32452 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:55315007 (55.3 MB) TX bytes:3491926 (3.4 MB)

    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 Metric:1
    RX packets:1133 errors:0 dropped:0 overruns:0 frame:0
    TX packets:1133 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:106182 (106.1 KB) TX bytes:106182 (106.1 KB)

    lsmod
    Module Size Used by
    dm_crypt 23011 0
    snd_hda_codec_hdmi 32007 4
    snd_hda_intel 33491 2
    snd_hda_codec 134212 2 snd_hda_codec_hdmi,snd_hda_intel
    snd_hwdep 13602 1 snd_hda_codec
    snd_pcm 96580 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi 13324 0
    snd_rawmidi 30512 1 snd_seq_midi
    snd_seq_midi_event 14899 1 snd_seq_midi
    snd_seq 61521 2 snd_seq_midi,snd_seq_midi_event
    snd_timer 29425 2 snd_pcm,snd_seq
    snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq
    edac_core 52451 0
    snd 78734 13 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd _hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_s eq_device
    k8temp 12978 0
    serio_raw 13215 0
    edac_mce_amd 23303 0
    soundcore 15047 1 snd
    snd_page_alloc 18484 2 snd_hda_intel,snd_pcm
    rfcomm 46619 0
    bnep 18140 2
    bluetooth 209199 10 rfcomm,bnep
    ppdev 17073 0
    i2c_nforce2 13013 0
    parport_pc 32688 1
    mac_hid 13205 0
    lp 17759 0
    parport 46345 3 ppdev,parport_pc,lp
    hid_generic 12493 0
    usbhid 46947 0
    hid 100366 2 hid_generic,usbhid
    nouveau 895609 3
    ttm 83595 1 nouveau
    drm_kms_helper 46784 1 nouveau
    drm 275528 5 nouveau,ttm,drm_kms_helper
    sata_nv 31830 3
    natsemi 36296 0
    pata_amd 14118 0
    i2c_algo_bit 13413 1 nouveau
    mxm_wmi 12979 1 nouveau
    video 19335 1 nouveau
    wmi 19070 2 nouveau,mxm_wmi
    forcedeth 67156 0

    cat /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
    auto eth1
    iface eth1 inet dhcp

    cat /etc/resolv.conf
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 192.168.1.1
    search default

    cat /etc/NetworkManager/NetworkManager.conf
    [main]
    plugins=ifupdown,keyfile
    dns=dnsmasq

    no-auto-default=00:40:F4:59:3B:4D,

    [ifupdown]
    managed=false

  6. #6
    Join Date
    Nov 2008
    Location
    Metro Boston
    Beans
    8,580
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Problems setting up network from ubuntu server 12.04

    eth0 has not been assigned an address.

    You also need to enable IP forwarding by uncommenting the line "net.ipv4.ip_forward=1" in /etc/sysctl.conf. Read the comments in that file for more details.

    You also need an iptables rule to "masquerade" the traffic from the Windows machine.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  7. #7
    Join Date
    Mar 2013
    Beans
    5

    Re: Problems setting up network from ubuntu server 12.04

    why am i assigning an address to a dhcp connection?

    how can i edit sysctl.conf when it says it is read only?

    How can I do all of the above in KDE as opposed to command line?

  8. #8
    Join Date
    Nov 2008
    Location
    Metro Boston
    Beans
    8,580
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Problems setting up network from ubuntu server 12.04

    I'm saying eth0 has not received an address from the DHCP server. If it had, the ifconfig entry would report the address.

    You have to edit /etc/sysctl.conf as root with sudo.

    As for doing this through KDE, I can't say. Try opening a terminal and using nano, e.g., "sudo nano /etc/sysctl.conf".
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  9. #9
    Join Date
    Mar 2013
    Beans
    5

    Re: Problems setting up network from ubuntu server 12.10

    Hi All,

    Still having problems.

    Are there any local to Kent Ubuntu Server Experts out there that can set up our server onsite?

  10. #10
    Join Date
    Apr 2012
    Beans
    5,127

    Re: Problems setting up network from ubuntu server 12.04

    Although it may seem like you're making life easier by installing the KDE desktop, bringing network-manager into the mix complicates things imho - the two network services don't always play well together, and network-manager really works best with a single active interface (e.g. it disables wireless by default when it detects a wired connection)

    I think you would find it easier if you at least removed network-manager (not sure whether KDE uses network-manager-gnome or has its own meta package) and defined BOTH interfaces in /etc/network/interfaces

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