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Hello, Few days ago i rebooted my pld linux server. To this time i have huge issue. I lost connection to internet however i can still ping a gateway from ...
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  1. 04-10-2012 #1
    Zacard
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    Problem after reboot - no internet connection

    Hello,

    Few days ago i rebooted my pld linux server. To this time i have huge issue. I lost connection to internet however i can still ping a gateway from this server and from ouside.

    To be sure i connected a notebook to gateway and it works fine.

    Im so depressed !
    Sorry for such a nooby post but im really newb. Plz give me some advice what can i do ? Should i paste here some kind of info ? Plz help
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  2. 04-11-2012 #2
    Lazydog
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    Post the output from the following commands;

    Code:
    ifconfig
route -n

    Regards
    Robert

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  3. 04-11-2012 #3
    Zacard
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    Code:
    Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
78.133.218.1    0.0.0.0         255.255.255.255 UH    0      0        0 eth2
78.133.218.16   0.0.0.0         255.255.255.248 U     0      0        0 eth4
78.133.218.16   0.0.0.0         255.255.255.248 U     0      0        0 eth5
78.133.218.125  0.0.0.0         255.255.255.255 UH    0      0        0 eth4
78.133.218.168  0.0.0.0         255.255.255.248 U     0      0        0 eth2
78.133.218.168  0.0.0.0         255.255.255.248 U     0      0        0 eth3
172.16.0.0      0.0.0.0         255.255.255.0   U     0      0        0 eth1
172.16.1.0      0.0.0.0         255.255.255.0   U     0      0        0 eth3
172.16.2.0      0.0.0.0         255.255.255.0   U     0      0        0 eth5
172.16.3.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0
172.16.10.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.10
172.16.20.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.20
172.16.30.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.30
172.16.40.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.40
172.16.50.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.50
172.16.60.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.60
172.16.70.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.70
172.16.80.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.80
172.16.90.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.90
172.16.99.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1.99


ifconfig

eth0      Link encap:Ethernet  HWaddr 00:15:17:41:48:C0
          inet addr:172.16.3.1  Bcast:172.16.3.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  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:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:18 Memory:b8820000-b8840000

eth1      Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.0.1  Bcast:172.16.0.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:135409 errors:0 dropped:0 overruns:0 frame:0
          TX packets:53586 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16212286 (15.4 Mb)  TX bytes:11871689 (11.3 Mb)
          Interrupt:19 Memory:b8800000-b8820000

eth1.10   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.10.1  Bcast:172.16.10.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:59765 errors:0 dropped:1 overruns:0 frame:0
          TX packets:31853 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7753673 (7.3 Mb)  TX bytes:5973103 (5.6 Mb)

eth1.20   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.20.1  Bcast:172.16.20.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:39240 errors:0 dropped:1 overruns:0 frame:0
          TX packets:14654 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3044668 (2.9 Mb)  TX bytes:4268238 (4.0 Mb)

eth1.30   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.30.1  Bcast:172.16.30.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:3544 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3169 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:327198 (319.5 Kb)  TX bytes:468356 (457.3 Kb)

eth1.40   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.40.1  Bcast:172.16.40.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:268 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1092 (1.0 Kb)  TX bytes:11472 (11.2 Kb)

eth1.50   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.50.1  Bcast:172.16.50.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:1644 (1.6 Kb)

eth1.60   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.60.1  Bcast:172.16.60.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:552 (552.0 b)

eth1.70   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.70.1  Bcast:172.16.70.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:552 (552.0 b)

eth1.80   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.80.1  Bcast:172.16.80.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:2736 (2.6 Kb)

eth1.90   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.90.1  Bcast:172.16.90.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:552 (552.0 b)

eth1.99   Link encap:Ethernet  HWaddr 00:15:17:41:48:C1
          inet addr:172.16.99.1  Bcast:172.16.99.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe41:48c1/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:16864 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2599 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1290912 (1.2 Mb)  TX bytes:598882 (584.8 Kb)

eth2      Link encap:Ethernet  HWaddr 00:1B:21:2D:43:94
          inet addr:78.133.218.169  Bcast:78.133.218.175  Mask:255.255.255.248
          inet6 addr: fe80::21b:21ff:fe2d:4394/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:13002 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:780829 (762.5 Kb)  TX bytes:510 (510.0 b)

eth3      Link encap:Ethernet  HWaddr 00:1B:21:2D:43:95
          inet addr:172.16.1.1  Bcast:172.16.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21b:21ff:fe2d:4395/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:140335 errors:0 dropped:0 overruns:0 frame:0
          TX packets:69429 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:11091212 (10.5 Mb)  TX bytes:5998103 (5.7 Mb)

eth4      Link encap:Ethernet  HWaddr 00:1B:21:2D:43:96
          inet addr:78.133.218.17  Bcast:78.133.218.23  Mask:255.255.255.248
          inet6 addr: fe80::21b:21ff:fe2d:4396/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:26814 errors:0 dropped:0 overruns:0 frame:0
          TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1676089 (1.5 Mb)  TX bytes:1686 (1.6 Kb)

eth5      Link encap:Ethernet  HWaddr 00:1B:21:2D:43:97
          inet addr:172.16.2.1  Bcast:172.16.2.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  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:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

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:4254 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4254 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:274814 (268.3 Kb)  TX bytes:274814 (268.3 Kb)
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  4. 04-11-2012 #4
    Lazydog
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    As you can see there is no default gateway setup in your routing tables. You are going to have to setup a default gateway in order to get out.

    Regards
    Robert

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  5. 04-12-2012 #5
    Zacard
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    Can u point a place with a configuration file ? No idea where it is
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  6. 04-12-2012 #6
    descendant_command
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    /etc/network/interfaces is the usual place
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  7. 04-12-2012 #7
    slapandtickle69
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    Hay Zacard, I hope you are well, In regards to your question


    Can u point a place with a configuration file ? No idea where it is
    You are Experiencing this because the more technical distros require you to manually bring a interface up or down, or set services to load on boot. your best option is to set a static ip.
    set the ip in a range between say 192.168.1.1 and 192.168.1.20, but make sure that no othere computers are using these ip addresses at the time so you can be sure you are not trying to use an already allocated address , (just turn the others off whilst you do this) Don't worry your other pc's will get a different ip when they boot again.

    Over the many distros of linux there are different locations that a static interface can be configured, I know of to that might help you.

    Backtrack /Gnome :

    Code:
    vim/etc/network/interfaces
    For example If you wanted to statically assign Eth0 an ip or gateway etc... you would type this in the interfaces text doc.

    Code:
    auto eth0
iface eth0 inet static

address 192.168.1.16 (your ip)
netmask 255.255.255.0 (netmask)
gateway 192.168.1.254 (your gateway)
    Save that

    Then,

    Code:
    vim/etc/resolve.conf
    edit this to what your DNS Server is, most likely your routers IP.

    Code:
     nameserver 192.168.1.254 (your DNS server Ip)

    Now,

    etc/init.d/networking restart
    .

    For Centos/RH :

    vim /etc/sysconfig/network-scripts
    To make Eth0 for example

    vim ifcfg-eth0
    Inside the doc use this format

    DEVICE=eth0 (the device int)
    ONBOOT=yes (if ya want to run on boot "yes" if not "no"
    TYPE=Ethernet (type of int) (optional)
    BOOTPROTO=static (if your adding a static ip "static" if ya want DHCP to figure it out use "dhcp"
    IPADDR=192.168.1.1 (static ip not needed if using dhcp)
    GATEWAY=192.168.1.254 (router ip)
    DNS=192.168.1.254 (prob same as gateway ip)
    NAME="my eth0" (optional)
    then
    service network restart
    I hope this helps.

    Thanks

    Ben
    Last edited by slapandtickle69; 04-12-2012 at 08:30 AM.
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  8. 04-12-2012 #8
    Lazydog
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    Quote Originally Posted by Zacard View Post
    however i can still ping a gateway from this server and from ouside.
    This is good and this is the address that you are going to need to set as your default gateway.

    If you are running RH or one of its siblings then you need to goto /etc/sysconfig/network-scripts and edit ifcfg-eth0 and make sure you have the following:

    Code:
    DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=<ip address you assigned this interface>
GATEWAY=<the ip address you can ping that is the gateway>
    There is more code you could add but is not necessary for the interface to function.

    Regards
    Robert

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