can ping to/from pcs on home network but not connect to internet

stumblefingers · 04-08-2004, 02:01 PM

I had Redhat 9 working fine but had to remove it temporarily - I've reinstalled it and now can't connect to the internet. I can ping to/from the other pcs on my home network but not get onto the internet.

Nothing has changed in the rest of my network configuration - I've tried turning off the redhat firewall but still can't connect.

I'm new to linux so this must be something simple that I can't see?

stumblefingers

tarballedtux · 04-08-2004, 02:08 PM

How is your network setup. Is your Linux box acting as a router or do you have say a Linksys router. What are the outputs of these commands:

route -n
ifconfig -a

--tarballedtux

pablob · 04-08-2004, 02:12 PM

Please detail the way you connect to the internet.

stumblefingers · 04-08-2004, 02:45 PM

I'm connected to the internet via a cable connection to a D-Link router - the laptop which I have redhat 9 on is now running a Knoppix boot CD and connecting to the internet fine - so I know it's not a hardware problem, but must be something wrong with my redhat 9 setup

zymurgist · 04-08-2004, 02:56 PM

Can you ping both sides of your D-Link router?

stumblefingers · 04-08-2004, 02:58 PM

Quote:

Originally posted by tarballedtux
How is your network setup. Is your Linux box acting as a router or do you have say a Linksys router. What are the outputs of these commands:

route -n
ifconfig -a

--tarballedtux

Bear with me here - I'm new to linux

I opened gnome terminal and tried theaboe commands in both user and root - I get:

bash: route -n: command not found
bash: ifconfig -a: command not found

Where should I be trying these commands?

I've got a D-Link DI614+ router

stumblefingers · 04-08-2004, 03:05 PM

Quote:

Originally posted by zymurgist
Can you ping both sides of your D-Link router?

I can ping my local network e.g. 192.168.0.100 and ping www.google.com at 66.102.9.99

So, yeah, both sides

Oh - and i'm using the default mozilla browser - but when i type www.google.com into it I get www.google.com could not be found. Please check the name and try again. And that's the response I get with any web address

zymurgist · 04-08-2004, 03:19 PM

Make sure you have port 80 open on the router. Your router will have two IP addresses. One assigned by your ISP and the internal address (usually 192.168.0.1 or .1.1). The internal address is your default gateway for your network. If you can ping both of these addresses from inside of your network, you are routing packets.

netstat -r will give your routing table.

stumblefingers · 04-08-2004, 03:42 PM

Quote:

Originally posted by zymurgist
Make sure you have port 80 open on the router. Your router will have two IP addresses. One assigned by your ISP and the internal address (usually 192.168.0.1 or .1.1). The internal address is your default gateway for your network. If you can ping both of these addresses from inside of your network, you are routing packets.

netstat -r will give your routing table.

I've not changed anything in the router and the problem laptop works fine with Knoppix

I can ping my IP address and 192.168.0.1

netstat gives me:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt 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
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0

Can't say that means anything to me - but hope it does to you

zymurgist · 04-08-2004, 03:56 PM

what is the IP/Network given to your router via your ISP? The second line in your routing table may be a problem. You can drop it using 'route del...'. You'll need to run that as su. (man route)

stumblefingers · 04-08-2004, 04:36 PM

Quote:

Originally posted by zymurgist
what is the IP/Network given to your router via your ISP? The second line in your routing table may be a problem. You can drop it using 'route del...'. You'll need to run that as su. (man route)

I don't know linux or much about networking - but if the laptop connects to the web using a knoppix boot disk and I am using the default settings on Redhat 9, then doesn't this localise the problem to a config setting in rh 9? It was working fine until I removed and reinstalled it.

tarballedtux · 04-08-2004, 09:55 PM

There are many things that may have change. One being that when you load up RH9 the DHCP client doesn't run. Or the your NIC driver is not loaded at all. Or the software to handle the routing tables and interface configuration was not installed. Which is a strong possibility since route and ifconfig are "commands not found"

--tarballedtux

stumblefingers · 04-09-2004, 11:35 AM

Quote:

Originally posted by tarballedtux
There are many things that may have change. One being that when you load up RH9 the DHCP client doesn't run. Or the your NIC driver is not loaded at all. Or the software to handle the routing tables and interface configuration was not installed. Which is a strong possibility since route and ifconfig are "commands not found"

--tarballedtux

Thanks tarballedtux

That makes sense as to why it doesn't work -- at least this gives me a new area to investigate

stumblefingers · 04-12-2004, 09:34 AM

In the end I gave up - reformatted the drive and installed Mandrake 10 - this works fine