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-   -   no connection (https://www.linuxquestions.org/questions/linux-newbie-8/no-connection-413511/)

BackwardsDown 02-09-2006 11:55 AM

no connection
 
hi,

I am new to linux (thats why I post in this forum),
and I have installed debian sarge net-install.

But when I start linux, I dont have a connection.
(Sometimes I do have a connection but I have to reboot a lot to get it)

Does someone know how I can solve this problem? Or where I can start looking?

d2490n 02-09-2006 12:22 PM

im pritty noob myself, but i think i might be able to help here.

use "ifconfig" (as root) and see if eth0 is up,(i asume your using ethernet) if not use "ifconfig eth0 up" than, if you use dhcp, use "dhcpcd eth0", thats all i got. hope it helps.

DropSig 02-09-2006 01:13 PM

Quote:

use "ifconfig" (as root) and see if eth0 is up,(i asume your using ethernet) if not use "ifconfig eth0 up" than, if you use dhcp, use "dhcpcd eth0", thats all i got. hope it helps.
That will more than likely work but can be annoying to do everytime. which distro are u running?

RedShirt 02-09-2006 01:41 PM

He is running Debian Sarge.

You will just have to edit the net configuration, how is it when it doesn't work... and what does it look like when it is working? And what is the extent of not working? No internet, or just no DNS?

DropSig 02-09-2006 01:48 PM

Ya maybe i should'nt read so fast....

BackwardsDown 02-09-2006 02:38 PM

Quote:

and what does it look like when it is working? And what is the extent of not working? No internet, or just no DNS?
I cant ping, I cant use firefox, cant use dselect, apt-get update doesnt work, cant use gaim... etc.
I have a dual boot with windows, and on windows the internet works correctly.

About the ifconfig, this is what I had when I have no connection. I have wrote it down on a piece of paper, and I am now typing it over, there could be some mistakes becouse of my bad handwryting:

eth1:
Link encap: Ethernet HWaddr 00:0A:48:02:85:7C
inet6 addr: fe80::20a:48ff:fe02:857c/64 scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC 1
RX packets:62 errors:0 dropped:0 overrruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carriers:20
collisions:0 txqueelen:1000
RX bytes:3720 (3.6 KiB) TX bytes:0 (0,0b)
interrupt 217 base adress:0xc000

lo:
linkencap local loopback
inet addr:127.0.0.1 mask: 255.0.0.0
inet addr::1/128 scope: Host
up loopback running mtu: 16436 metric1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carriers:0
collisions:0 txqueelen:0
RX bytes:560 (560,0b) TX bytes:560 (560,0b)

RedShirt 02-09-2006 03:04 PM

That doesn't really mention what is wrong. Can you go to IP addresses, instead of web addresses? Then it is a simple DNS issue that can be resolved(no pun inteded) easily.

Try going to a few IPs like:
68.178.151.47
64.233.167.99
199.181.132.250

Let me know if that works when the internet is "dead"

BackwardsDown 02-09-2006 03:13 PM

Quote:

Try going to a few IPs like:
Should I try go to them with firefox?
Or should I ping them with "ping ip"?

DropSig 02-09-2006 03:52 PM

If u cant ping anthing than it is not configured properly.
Quote:

eth1:
Link encap: Ethernet HWaddr 00:0A:48:02:85:7C
inet6 addr: fe80::20a:48ff:fe02:857c/64 scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC 1
RX packets:62 errors:0 dropped:0 overrruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carriers:20
collisions:0 txqueelen:1000
RX bytes:3720 (3.6 KiB) TX bytes:0 (0,0b)
interrupt 217 base adress:0xc000
U dont seem to be assigned an ip addr.

Do you have 2 ethernet card? because u should see eth0 before eth1.

if u do have 2, do this in a console as root:
#ifconfig eth0 up

If u have a dynamic ip (more than likely) try this in a console as root:
#dhcpcd eth0
and/or
#dhcpcd eth1

then ifconfig should display about the same thing but u should have an ip addr assigned.

If u have a static ip u will have to assign it manually, i am not in linux right now so i cant find the command for that yet, but u probably have a dynamic.

Run those command and cut/paste any ouput u get for them, also post back ifconfig after running those if u still have problem.

docalton 02-09-2006 04:03 PM

The debian way is to edit the /etc/network/interfaces file.

In this file, it may look like:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

The above defines the loopback and the first ethernet device. It will use dhcp to assign the ip address. If you need a static ipaddress, then try the following for the eth0 device. Changing to an appropriate ip address.

auto eth0
iface eth0 inet static
address 192.168.0.2 <----- change address to reflect your network
netmask 255.255.255.0 <----- once again change appropriately
gateway 192.168.0.1 <----- put in the default gateway here, perhaps router address

hope this helps

BackwardsDown 02-10-2006 12:03 PM

Quote:

Try going to a few IPs like:
68.178.151.47
64.233.167.99
199.181.132.250

Let me know if that works when the internet is "dead"
It sais with all three ip's:
"Network is unreachable"

Quote:

Do you have 2 ethernet card?
Yes I have got two.

Quote:

If u have a dynamic ip (more than likely) try this in a console as root:
I think I have a static ip, in windows I allways have the same IP.

Output for ifconfig (only for eth0):

eth0:
Link encap: Ethernet HWaddr 00:0A:48:02:85:7C
inet6 addr: fe80::200:48ff:fe02:857c/64 scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC 1
RX packets:1 errors:0 dropped:0 overrruns:0 frame:0
TX packets:0 errors:3 dropped:0 overruns:0 carriers:6
collisions:0 txqueelen:1000
RX bytes:60 (60.0 KiB) TX bytes:0 (0,0b)
interrupt 209 base adress:0xc000

And I have added this to my interfaces file:

auto eth0
iface eth0 inet static
address 83.81.177.195 <--my ip
netmask 255.255.255.0
gateway 83.81.176.1

But with no luck :(

enemorales 02-10-2006 12:18 PM

Hi,

If you always have the same IP number it does not means it is static. You could be using DHCP and it just that the server always assigns you the same IP. Try to check that on your Windows configuration (can't help you there, too long since the last time I was on Windows).

Next, I would try to make it work using ifconfig/ifup before editing /etc/network/interfaces. Doing so, you'll learn which is the problem, solve it and then to edit the file will be simple.

Also, since eth1 seems to work fine: Have you tried to use that one to connect to the internet? My guess is that you are using it to share the internet connection, but if not then it wouldn't hurt you to connect thru that one. (At least it may help you to isolate problems.)

Let us know how things are going.

Regards

BackwardsDown 02-10-2006 01:16 PM

Quote:

#dhcpcd eth0
The dhcpcd command doesnt exist:confused:

Quote:

Have you tried to use that one to connect to the internet?
I have switched the network cables in the bakc of my computer, with no succes:rolleyes:

Quote:

You could be using DHCP
I have checked it and I am using DHCP.

DropSig 02-10-2006 02:27 PM

there is your main problem, but i dont know how to install on debian sarge. Try to find and install it.

docalton 02-10-2006 03:07 PM

To install dhcpcd on debian, execute the following command as root:

apt-get install dhcpcd

that should install the dhcp client software.

Hope this helps


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