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Old 07-23-2007, 06:14 AM   #1
pratyush
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Can't connect to internet using linux


Hi All

I am completely new to Linux. I installed Linux many a times on my PC, because of the same problem all the time.
I have got a xDSL connection on my PC at home.When I manually configure the IP address, network host, default gateway and DNS server entries, I am not able to connect to the internet. I have also got Windows installed on my system. While using Windows, I can easily connect using the same IP address, network host, default gateway and DNS server entries. I can also ping the default gateway from my Windows. But, when I try to ping the default gateway from Linux, it says, "connect:Network not reachable".
I tried installing Red Hat, Fedora, Ubuntu, but everytime I faced the same problem.

Please help!!!!!!!!!!

Regards
Pratyush
 
Old 07-23-2007, 08:46 AM   #2
Larry Webb
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A little more info, what type of router-modem do you have and how are you connected? Is it ethernet, 2 wire, etc?
 
Old 07-23-2007, 01:49 PM   #3
pratyush
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yeah...i m using ethernet and a DPC2100R2 cable modem...

i m using a xDSL connection.

Regards
Pratyush
 
Old 07-23-2007, 04:21 PM   #4
pratyush
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Please do not ignore my problem!!!!!!!!!!!!

Somebody.....please help!!!!!!!!!!!!!!!


Regards
Pratyush
 
Old 07-24-2007, 01:36 AM   #5
Nylex
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What kind of network card is it? lspci and lsmod output please!
 
Old 07-24-2007, 08:22 AM   #6
pratyush
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I typed lsmod and lspci. But it said,"
lsmod: Command not found.
lspci: Command not found.

I checked in the /bin directory. There is no executable for lsmod and lspci.
What am I supposed to do next?

Regards
Pratyush
 
Old 07-24-2007, 09:39 AM   #7
Nylex
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Run those commands as root.
 
Old 07-24-2007, 10:58 AM   #8
pratyush
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I think it was not a problem of not being a root user. Actually the lsmod & lspci executables are present in /sbin. I had thought that they are present in /bin.

Output of lsmod
Module Size Used by Not tainted
nls_iso8859-1 3516 1 (autoclean)
nls_cp437 5116 1 (autoclean)
vfat 13004 1 (autoclean)
fat 38808 0 (autoclean) [vfat]
i830 74336 1
agpgart 47776 11 (autoclean)
parport_pc 19076 1 (autoclean)
lp 8996 0 (autoclean)
parport 37056 1 (autoclean) [parport_pc lp]
autofs 13268 0 (autoclean) (unused)
8139too 18088 1
mii 3976 0 [8139too]
ipt_REJECT 3928 6 (autoclean)
iptable_filter 2412 1 (autoclean)
ip_tables 15096 2 [ipt_REJECT iptable_filter]
sg 36524 0 (autoclean)
sr_mod 18136 0 (autoclean)
microcode 4668 0 (autoclean)
ide-scsi 12208 0
scsi_mod 107160 3 [sg sr_mod ide-scsi]
ide-cd 35708 0
cdrom 33728 0 [sr_mod ide-cd]
keybdev 2944 0 (unused)
mousedev 5492 1
hid 22148 0 (unused)
input 5856 0 [keybdev mousedev hid]
usb-uhci 26348 0 (unused)
ehci-hcd 19976 0 (unused)
usbcore 78784 1 [hid usb-uhci ehci-hcd]
ext3 70784 1
jbd 51892 1 [ext3]


Output of lspci
00:00.0 Host bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset Host Bridge (rev 03)
00:02.0 VGA compatible controller: Intel Corp. 82845G/GL [Brookdale-G] Chipset Integrated Graphics Device (rev 03)
00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 02)
00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 02)
00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 02)
00:1d.7 USB Controller: Intel Corp. 82801DB USB EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 82)
00:1f.0 ISA bridge: Intel Corp. 82801DB ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio (rev 02)
02:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
/sbin/lspci
00:00.0 Host bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset Host Bridge (rev 03)
00:02.0 VGA compatible controller: Intel Corp. 82845G/GL [Brookdale-G] Chipset Integrated Graphics Device (rev 03)
00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 02)
00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 02)
00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 02)
00:1d.7 USB Controller: Intel Corp. 82801DB USB EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 82)
00:1f.0 ISA bridge: Intel Corp. 82801DB ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio (rev 02)
02:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
 
Old 07-24-2007, 11:09 AM   #9
Nylex
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Well yes. /sbin is in root's $PATH, but usually not in the user's $PATH.

Anyway, it seems like your card is being detected properly as the correct kernel module is already loaded. Can you show the output of ifconfig as well (again, run as root, or if you use your regular user account, you'll need to run "/sbin/ifconfig") please?
 
Old 07-24-2007, 12:05 PM   #10
pratyush
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well, the O/P of ifconfig is

eth0 Link encap:Ethernet HWaddr 00:0C:6E:C3:80:A4
inet addr:67.243.37.177 Bcast:67.243.39.255 Mask:255.255.252.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:16494 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:997254 (973.8 Kb) TX bytes:240 (240.0 b)
Interrupt:10 Base address:0x5000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:430 errors:0 dropped:0 overruns:0 frame:0
TX packets:430 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:28921 (28.2 Kb) TX bytes:28921 (28.2 Kb)



Regards
Pratyush
 
Old 07-24-2007, 06:31 PM   #11
mseilis
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Also a Linux newbie, but just wondering...Any chance a firewall is blocking you? Some start automatically.
 
Old 07-25-2007, 12:39 AM   #12
Nylex
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Hmm, at least you have an IP address (though you might want to remove it from your post). Can you ping websites?
 
Old 07-25-2007, 04:56 AM   #13
pratyush
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No, I can not ping websites.

Regsrds
Pratyush
 
Old 07-25-2007, 05:01 AM   #14
Nylex
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Is there anything in /etc/resolv.conf? Which distro are you using? That may help, because some may have firewalls set up (as mseilis stated above).
 
Old 07-25-2007, 09:25 AM   #15
pratyush
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I am using Red Hat 9.0.

The contents of te /etc/resolv.conf file are as follows:

nameserver 85.255.115.4
nameserver 85.255.112.15
nameserver 202.88.130.15

Thanks & regards
Pratyush
 
  


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