Hi gurus.

I'm trying to connect to my school's LAN with my laptop (dual boot Slack 10.2 and WinXP) and... it's not working. And I don't know why. It works under Windows, and from home (I have DSL there), the connection "just worked".

I can ping localhost, but if I try anything remote, I get "Network is unreachable." Any suggestions? I know ~nothing about networking; it all seems like black magic to me, so thanks a lot for your help.

~v

Try this at a terminal as root:

dhcpcd eth0 && ping google.co.uk


also could you atach the output of this command as root before and after you have run the above command.


ifconfig

It sounds like you are missing your gateway or maybe DNS address.

How are you getting an IP address on you scholl LAN. Is it static or by DHCP.

Can you ping any other hosts on the local network.

If you could read you would of noticed he said he cant reach anything outside.

Before:

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:194 errors:0 dropped:0 overruns:0 frame:0
TX packets:194 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:16280 (15.8 Kb) TX bytes:16280 (15.8 Kb)


After:

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:210 errors:0 dropped:0 overruns:0 frame:0
TX packets:210 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:17576 (17.1 Kb) TX bytes:17576 (17.1 Kb)

DHCP. Or at least, that's the idea. And I can't ping any other hosts.

Ok so now it looks your network card is not working.

Which kernel are you using, please post the output of 'uname -a' (no qoutes)

And 'lspci'
And 'lsmod'

Well ignore the uname -a because i am pretty sure (unless you upgraded) you ar on a 2.4 kernel because thats slack default. Just run as root in a term

lspci

uname -a
Linux localhost 2.4.31 #8 Sun Jun 5 19:08:07 PDT 2005 i686 unknown unknown GNU/Linux

00:00.0 Host bridge: Intel Corporation 82845 845 (Brookdale) Chipset Host Bridge (rev 04)
00:01.0 PCI bridge: Intel Corporation 82845 845 (Brookdale) Chipset AGP Bridge (rev 04)
00:1d.0 USB Controller: Intel Corporation 82801CA/CAM USB (Hub #1) (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801CA/CAM USB (Hub #2) (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801CA/CAM USB (Hub #3) (rev 02)
00:1e.0 PCI bridge: Intel Cprporation 82801 Mobile PCI Bridge (rev 42)
00:1f.0 ISA bridge: Intel Corporation 82801CAM ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801CAM IDE U100 (rev 02)
00:1f.3 SMBus: Intel Corporation 82801CA/CAM SMBus Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801CA/CAM AC'97 Audio Controller (rev 02)
00:1f.6 Modem: Intel Corporation 82801CA/CAM AC'97 Modem Controller (rev 02)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500]
02:00.0 CardBus bridge: Texas Instruments PCI1520 PC card Cardbus Controller (rev 01)
02:00.1 CardBus bridge: Texas Instruments PCI1520 PC card Cardbus Controller (rev 01)
02:08.0 Ethernet controller: Intel Corporation 82801CAM (ICH3) PRO/100 VE (LOM) Ethernet Controller (rev 42)

I can give the output of lsmod, too, though I have to type all this in by hand, so if there are only a few lines that are helpful, I'd rather try to reproduce only those. (And sorry if there are typos...)

Ok, so now we know what hardware you have.

I asked for the output of 'uname -a' because a common mistake is to forget th install the modules for the 2.6 kernel.

Anyway have a look at the output of 'lsmod' and see if you have an entry for e100. This is the module (read driver in windows terms) for your network adaptor.

Hrm, I don't quite seem to. There are these lines, however:

eepro100 18836 0
mii 2272 0 [eepro100]

Hmmm yeah same thing with diff name type this at terminal as root:

modprobe eepro100

then

dhcpcd eth0

then


ping google.co.uk

Thats good, they are a newer version of the module.

As root run 'netconfig' this should ask you some question and set up your network. When it asks about your IP address choose to set up by DHCP (dynamic host configuration protocol)

Try my idear first

I did, and got
ping: unknown host google.co.uk

Then I tried
ping 64.233.183.103

and got
connect: Network is unreachable

I'm a little hesitant to run netconfig because of the problem here, which I never resolved. I'm pretty sure that it's set up to get an IP address via DHCP, though.