Network problem

[sinik]

Hello,
Since yesterday I have a big problem with the network connection using my installed BackTrack5 KDE 32bit.
Im connected to the internet by wifi...
Im using a compatible Wireless Card and WICD shows that its connected and that he obtains an IP but when I go to my firefox I cannot see any web page, in all of them I get the message, Server not found
I've searched about this in google and it seems like it is a name resolution problem (I don't get a DNS)
the commands :

su -c 'echo "nameserver 8.8.8.8" > /etc/resolv.conf'

But

ping 8.8.8.8

shows this message : Network is unreachable

[KMDave]

How about checking which IP you received from the DHCP server?

[sinik]

thanks foryour quick reply
what do you mean by checking the IP from the DHCP server ?!
(sorry im a beginner )

[Ignatius]

I'd be inclined to try the following in sequence to see where the problem occurs:

ping 127.0.0.1
ping <MyIpAddress> (displayed by ifconfig)
ping <DefaultGateway>
ping 8.8.8.8
ping www.google.com

That will give an indication about whether the problem is just on your system (i.e. the TCP/IP stack), one or other of the network cards in your system or the router/modem, the network cable, the configuration of the router/modem or a problem with the connection beyond to your ISP.

Is it possible for you to enter the configuration screens of the router/modem and ping 8.8.8.8 or www.google.com from there?

[sinik]

Thanks for your reply
Im not using a static IP but Im always having this IP 197.1.155.50

[iproute]

clearly if you cannot ping an IP address (8.8.8.8) this trouble is not DNS related. I strongly recommend attempting a command line wireless connection with wpa_supplicant as it will clearly show you in the output what is going wrong. If there is nothing wrong there, try manually configuring your IP settings.

[rizler]

use the command route do you have a default gateway setup ? i have had an issue where dhcp in linux doesn't add the default gateway also have you done a ifconfig -a to ensure that you have gotten an ip address. And in regaurds to your dns the whole point of dns is to go from a name to ip if you type in the ip address you bypass the name therefore not needing dns and you have lowered the problem to the network layer

[Ignatius]

@sinik - open a shell, run the command <ifconfig> and post the output.

[sinik]

Thanks everybody for your help problem solved
I have reset my router back to factory settings, the wifi configuration was in disarray