Ethernet working but can't use the internet?

Dj_Jestar · 10 Oct 2008 at 11:26

I take it that is the correct gateway IP? Did it produce that output quickly, or did you have to wait a while? (This indicates a network timeout if it takes ages)

Try setting your nameserver address to the same as the gateway.

dan7827 · 10 Oct 2008 at 12:54

Yep, 192.168.0.1 is set as the gateway & nameservers. Like I say the windows pcs are connecting through the router and work fine, I cant see any difference in the settings that would cause the odd behaviour. :confused:

Dj_Jestar · 10 Oct 2008 at 13:01

Are you using DHCP or static?

Have you checked what `ifconfig eth0` says, and is it the correct address?

It is bizarre that it seems to be pinging the router fine, but can't see the web. Infact, can you ping any IP on the web?

dan7827 · 6 Nov 2008 at 10:14

Sorry for the delayed response, I have found some time to have another look at this headache problem so here goes.

At the moment I have set it up to use the ethernet card instead of the gigabit card and have disabled the gigabit card. The pc can ping by hostname and ip but tell it to go to resolve a website with wget or firefox and it seems to wait forever (nothing happens), other pcs on the network haven't got any problems so there’s something I'm missing with this setup. Below is the result of trying to get to the root of the problem.

Code:

ifconfig:
---------
eth0      Link encap:Ethernet  HWaddr 00:40:F4:62:50:D4
          inet addr:192.168.0.200  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::240:f4ff:fe62:50d4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11510 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13357 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1644799 (1.5 MiB)  TX bytes:7303402 (6.9 MiB)
          Interrupt:10 Base address:0xe000

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:17196 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17196 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:9420371 (8.9 MiB)  TX bytes:9420371 (8.9 MiB)


cat ifcfg-eth0:
---------------
# Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
DEVICE=eth0
BOOTPROTO=none
BROADCAST=192.168.0.255
HWADDR=00:40:F4:62:50:D4
IPADDR=192.168.0.200
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
GATEWAY=192.168.0.1


nslookup google.co.uk:
----------------------
Server:         192.168.0.1
Address:        192.168.0.1#53
Non-authoritative answer:
Name:   google.co.uk
Address: 72.14.221.104



ping google.co.uk:
------------------
PING google.co.uk (72.14.221.104) 56(84) bytes of data.
64 bytes from google.co.uk (72.14.221.104): icmp_seq=1 ttl=243 time=80.9 ms
64 bytes from google.co.uk (72.14.221.104): icmp_seq=2 ttl=243 time=77.1 ms
--- google.co.uk ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 77.138/79.061/80.985/1.943 ms



ping 72.14.221.104:
-------------------
PING 72.14.221.104 (72.14.221.104) 56(84) bytes of data.
64 bytes from 72.14.221.104: icmp_seq=1 ttl=243 time=79.9 ms
64 bytes from 72.14.221.104: icmp_seq=2 ttl=243 time=76.5 ms
--- 72.14.221.104 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 76.583/78.250/79.918/1.690 ms



wget http://www.google.co.uk/intl/en_uk/images/logo.gif:
---------------------------------------------------------
--11:07:55--  http://www.google.co.uk/intl/en_uk/images/logo.gif
Resolving www.google.co.uk... 1.0.0.0
Connecting to www.google.co.uk|1.0.0.0|:80...



dmesg|grep eth:
---------------
eth0: RTL8169s/8110s at 0xf883a000, 00:c0:49:f2:91:a7, IRQ 12
eth1: RealTek RTL8139 at 0xf888e000, 00:40:f4:62:50:d4, IRQ 10
eth1:  Identified 8139 chip type 'RTL-8100B/8139D'
eth0: link up, 100Mbps, full-duplex, lpa 0x41E1
eth0: no IPv6 routers present
eth0: link up, 100Mbps, full-duplex, lpa 0x41E1
eth0: no IPv6 routers present



cat resolv.conf:
----------------
nameserver 192.168.0.1
nameserver 69.111.95.106
nameserver 206.196.151.153



route:
------
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
169.254.0.0     *               255.255.0.0     U     0      0        0 eth0
default         mygateway.ed7   0.0.0.0         UG    0      0        0 eth0



chkconfig --list:
-----------------
NetworkManager  0:off   1:off   2:off   3:off   4:off   5:off   6:off
NetworkManagerDispatcher        0:off   1:off   2:off   3:off   4:off   5:off  6:off
acpid           0:off   1:off   2:off   3:on    4:on    5:on    6:off
anacron         0:off   1:off   2:on    3:on    4:on    5:on    6:off
apmd            0:off   1:off   2:on    3:on    4:on    5:off   6:off
atd             0:off   1:off   2:off   3:on    4:on    5:on    6:off
auditd          0:off   1:off   2:on    3:on    4:on    5:on    6:off
autofs          0:off   1:off   2:off   3:on    4:on    5:on    6:off
avahi-daemon    0:off   1:off   2:off   3:on    4:on    5:on    6:off
avahi-dnsconfd  0:off   1:off   2:off   3:off   4:off   5:off   6:off
conman          0:off   1:off   2:off   3:off   4:off   5:off   6:off
cpuspeed        0:off   1:on    2:on    3:on    4:on    5:off   6:off
crond           0:off   1:off   2:on    3:on    4:on    5:on    6:off
cups            0:off   1:off   2:on    3:on    4:on    5:off   6:off
dc_client       0:off   1:off   2:off   3:off   4:off   5:off   6:off
dc_server       0:off   1:off   2:off   3:off   4:off   5:off   6:off
dhcdbd          0:off   1:off   2:off   3:off   4:off   5:off   6:off
dovecot         0:off   1:off   2:off   3:off   4:off   5:off   6:off
firstboot       0:off   1:off   2:off   3:on    4:off   5:off   6:off
gpm             0:off   1:off   2:on    3:on    4:on    5:on    6:off
haldaemon       0:off   1:off   2:off   3:on    4:on    5:on    6:off
hplip           0:off   1:off   2:on    3:on    4:on    5:off   6:off
httpd           0:off   1:off   2:on    3:on    4:off   5:on    6:off
ibmasm          0:off   1:off   2:off   3:off   4:off   5:off   6:off
ip6tables       0:off   1:off   2:off   3:off   4:off   5:off   6:off
ipmi            0:off   1:off   2:off   3:off   4:off   5:off   6:off
iptables        0:off   1:off   2:off   3:off   4:off   5:off   6:off
irda            0:off   1:off   2:off   3:off   4:off   5:off   6:off
irqbalance      0:off   1:off   2:on    3:on    4:on    5:on    6:off
kdump           0:off   1:off   2:off   3:off   4:off   5:off   6:off
kudzu           0:off   1:off   2:off   3:on    4:on    5:on    6:off
lvm2-monitor    0:off   1:on    2:on    3:on    4:on    5:on    6:off
mcstrans        0:off   1:off   2:on    3:on    4:on    5:on    6:off
mdmonitor       0:off   1:off   2:on    3:on    4:on    5:off   6:off
mdmpd           0:off   1:off   2:off   3:off   4:off   5:off   6:off
messagebus      0:off   1:off   2:off   3:on    4:on    5:on    6:off
multipathd      0:off   1:off   2:off   3:off   4:off   5:off   6:off
mysqld          0:off   1:off   2:on    3:on    4:off   5:on    6:off
named           0:off   1:off   2:off   3:off   4:off   5:off   6:off
netconsole      0:off   1:off   2:off   3:off   4:off   5:off   6:off
netfs           0:off   1:off   2:off   3:on    4:on    5:on    6:off
netplugd        0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
nfs             0:off   1:off   2:off   3:off   4:off   5:off   6:off
nfslock         0:off   1:off   2:off   3:on    4:on    5:on    6:off
nscd            0:off   1:off   2:off   3:off   4:off   5:off   6:off
ntpd            0:off   1:off   2:off   3:off   4:off   5:off   6:off
oddjobd         0:off   1:off   2:off   3:off   4:off   5:off   6:off
pcscd           0:off   1:off   2:on    3:on    4:on    5:off   6:off
portmap         0:off   1:off   2:off   3:on    4:on    5:on    6:off
psacct          0:off   1:off   2:off   3:off   4:off   5:off   6:off
rdisc           0:off   1:off   2:off   3:off   4:off   5:off   6:off
readahead_early 0:off   1:off   2:on    3:on    4:on    5:on    6:off
readahead_later 0:off   1:off   2:off   3:off   4:off   5:on    6:off
restorecond     0:off   1:off   2:on    3:on    4:on    5:on    6:off
rpcgssd         0:off   1:off   2:off   3:on    4:on    5:on    6:off
rpcidmapd       0:off   1:off   2:off   3:on    4:on    5:on    6:off
rpcsvcgssd      0:off   1:off   2:off   3:off   4:off   5:off   6:off
rwhod           0:off   1:off   2:off   3:off   4:off   5:off   6:off
saslauthd       0:off   1:off   2:off   3:off   4:off   5:off   6:off
sendmail        0:off   1:off   2:on    3:on    4:on    5:off   6:off
setroubleshoot  0:off   1:off   2:off   3:on    4:on    5:on    6:off
smartd          0:off   1:off   2:on    3:on    4:on    5:on    6:off
smb             0:off   1:off   2:off   3:off   4:off   5:off   6:off
spamassassin    0:off   1:off   2:off   3:off   4:off   5:off   6:off
squid           0:off   1:off   2:on    3:on    4:off   5:on    6:off
sshd            0:off   1:off   2:on    3:on    4:on    5:on    6:off
syslog          0:off   1:off   2:on    3:on    4:on    5:on    6:off
tux             0:off   1:off   2:off   3:off   4:off   5:off   6:off
vncserver       0:off   1:off   2:on    3:on    4:off   5:on    6:off
vsftpd          0:off   1:off   2:off   3:off   4:off   5:off   6:off
wdaemon         0:off   1:off   2:off   3:off   4:off   5:off   6:off
webmin          0:off   1:off   2:on    3:on    4:on    5:on    6:off
winbind         0:off   1:off   2:off   3:off   4:off   5:off   6:off
wpa_supplicant  0:off   1:off   2:off   3:off   4:off   5:off   6:off
xfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
xinetd          0:off   1:off   2:off   3:on    4:on    5:on    6:off
ypbind          0:off   1:off   2:off   3:off   4:off   5:off   6:off
yum-updatesd    0:off   1:off   2:on    3:on    4:on    5:on    6:off

xinetd based services:
        chargen-dgram:  off
        chargen-stream: off
        cvs:            off
        daytime-dgram:  off
        daytime-stream: off
        discard-dgram:  off
        discard-stream: off
        echo-dgram:     off
        echo-stream:    off
        eklogin:        off
        ekrb5-telnet:   off
        gssftp:         off
        klogin:         off
        krb5-telnet:    off
        kshell:         off
        rsync:          off
        tcpmux-server:  off
        time-dgram:     off
        time-stream:    off

Sorry for the scary length of the outputs above, hopefully it should show everything in the systems current state. Thanks to anyone who dare to solve this problem!

brummie · 6 Nov 2008 at 11:00

have you tried manually changing the DNS servers? Why is it set to use 192.168.0.1?

I use open DNS as i have kiddies use the computer

Code:

# Generated by NetworkManager
nameserver 208.67.222.222
nameserver 208.67.220.220

Dj_Jestar · 6 Nov 2008 at 13:08

I asked him to try using 192.168.0.1 as most (if not all) routers will forward nameservers.

dan7827 · 6 Nov 2008 at 19:56

Thanks for posting those nameservers, they seem to work but it doesn't explain why none of the others work when they have been tested on other pcson the same network.

Code:

nameserver 208.67.222.222
nameserver 208.67.220.220

Even the router doesn't work on this linux box for dns, weird.

Code:

nameserver 192.168.0.1

Or these

Code:

nameserver 69.111.95.106
nameserver 206.196.151.153

Can anyone explain this???

leezer3 · 6 Nov 2008 at 23:50

I'd try disabling IPv6 & see if that helps matters at all, with it enabled some combinations of setups can really rat up. Add these to /etc/modprobe.conf:

Code:

alias ipv6 off
alias net-pf-10 off

Cheers

-Leezer-

dan7827 · 8 Nov 2008 at 20:40

That seems to have done the trick.

Thanks a lot!