cant ping external website

[Luke Militello]

Couldn't help but notice you are referring to the file as 'resolve.conf' 
when in fact it is 'resolv.conf'.  There is no 'e' at the end, perhaps 
this is your problem.  Verify this and the try an nslookup to prove DNS 
is working.

nslookup google.com

Should return the IP addresse(s) for the host you query.

Also, you might wish to verify that the nameserver in question will 
resolve hosts for the IP which you are sourcing from.  For exmaple, it 
will obviously not resolve for me, however you can still port scan it to 
make sure the service is there.

PROMPT> nslookup www.web.de 132.230.200.200
Server:		132.230.200.200
Address:	132.230.200.200#53

** server can't find www.web.de: REFUSED

PROMPT> sudo nmap -sU -P0 -v -p 53 132.230.200.200

Starting Nmap 4.53 ( http://insecure.org ) at 2008-09-23 08:32 EDT
Initiating Parallel DNS resolution of 1 host. at 08:32
Completed Parallel DNS resolution of 1 host. at 08:32, 5.50s elapsed
Initiating UDP Scan at 08:32
Scanning dns0.fun.uni-freiburg.de (132.230.200.200) [1 port]
Completed UDP Scan at 08:32, 2.05s elapsed (1 total ports)
Host dns0.fun.uni-freiburg.de (132.230.200.200) appears to be up ... good.
Interesting ports on dns0.fun.uni-freiburg.de (132.230.200.200):
PORT   STATE         SERVICE
53/udp open|filtered domain

Read data files from: /usr/share/nmap
Nmap done: 1 IP address (1 host up) scanned in 7.613 seconds
            Raw packets sent: 2 (56B) | Rcvd: 0 (0B)

Hope this helps!
-Luke

Donny George wrote:
> the file resolve.conf
> nameserver 132.230.200.200 <http://132.230.200.200>
> nameserver 132.230.200.200 <http://132.230.200.200>
> 
> i am able to ping the nameserver ip succesfully
> 
> but when i ping 217.72.195.42 <http://217.72.195.42> its kind of still 
> and then later shows unknown host
> 
> 
> i can ping other machines on the network
> 
> 
> the ifconfig is as follows
> 
> inet addr:10.4.139.3 <http://10.4.139.3> Bcast:132.230.139.255 
> <http://132.230.139.255> Mask:255.255.255.0 <http://255.255.255.0>
> 
> 
> the /etc/network/interfaces is
> 
> # The loopback network interface
> 
> auto lo
> 
> iface lo inet loopback
> 
> # The primary network interface
> 
> auto eth0
> 
> iface eth0 inet static
> 
> address 10.4.139.3 <http://10.4.139.3>
> 
> netmask 255.255.255.0 <http://255.255.255.0>
> 
> network 10.4.139.0 <http://10.4.139.0>
> 
> broadcast 10.4.139.255 <http://10.4.139.255>
> 
> gateway 10.4.139.254 <http://10.4.139.254>
> 
> # dns-* options are implemented by the resolvconf package, if installed
> 
> dns-nameservers 132.230.200.200 <http://132.230.200.200>
> 
> dns-search imtek.uni-freiburg.de <http://imtek.uni-freiburg.de>
> 
> 
> 
> thankyou for your help in advance
> 
> don
> 
> 
> 
> 
> 
> On Tue, Sep 23, 2008 at 11:11 AM, Markus Schönhaber 
> <ubuntu-users at list-post.mks-mail.de 
> <mailto:ubuntu-users at list-post.mks-mail.de>> wrote:
> 
>     Donny George:
> 
>      > i have set up a new ubuntu 8.04 and am trying to get the internet
>      > connectivity. but unfortunately even after setting up the ip, the
>     gateway
>      > and also the file resolve.conf with the nameserver ip, the result
>     that i get
>      > when i ping www.web.de <http://www.web.de> is ping:unknown host
>     www.web.de <http://www.web.de>
>      >
>      > i looked for many threads regarding to this in the forums but
>     cudnt yet get
>      > a convincing answer
> 
>     The first step is to find out what exactly is wrong. Among the things
>     you can do are:
>     - post your /etc/resolv.conf maybe there's an error in it
>     - do a
>     ping 217.72.195.42 <http://217.72.195.42>
>     (217.72.195.42 <http://217.72.195.42> is what my DNS gave me as IP
>     of www.web.de <http://www.web.de>)
>     - do a
>     host www.web.de <http://www.web.de>
>     - ping the IP of the nameserver
>     - do a
>     telnet <IP of the nameserver> domain
>     - if there's some other machine/device connected via IP in your local
>     net, ping it's IP
>     - post the output of
>     ifconfig
> 
>     Regards
>       mks
> 
> 
>     --
>     ubuntu-users mailing list
>     ubuntu-users at lists.ubuntu.com <mailto:ubuntu-users at lists.ubuntu.com>
>     Modify settings or unsubscribe at:
>     https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
> 
>