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Re: Unable to make DNS queries



On Wed, 06 Jan 2010 11:00:37 +0530, Foss User wrote:

> I just installed a new instance of Debian 5.0 (Lenny). I am unable to
> download files from any websites. When I try wget http://www.google.com/
> I see this output in tshark.
> 
> debian:~# tshark -f "udp port 53"
> Running as user "root" and group "root". This could be dangerous.
> Capturing on eth0
>   0.000000 192.168.1.155 -> 192.168.1.20  DNS Standard query AAAA
>   www.google.com 5.003586 192.168.1.155 -> 192.168.1.21  DNS Standard
>   query AAAA www.google.com
>  10.007481 192.168.1.155 -> 192.168.1.20  DNS Standard query AAAA
>  www.google.com 15.011642 192.168.1.155 -> 192.168.1.21  DNS Standard
>  query AAAA www.google.com 20.015882 192.168.1.155 -> 192.168.1.20  DNS
>  Standard query AAAA www.google.com 25.019964 192.168.1.155 ->
>  192.168.1.21  DNS Standard query AAAA www.google.com 30.024030
>  192.168.1.155 -> 192.168.1.20  DNS Standard query AAAA www.google.com
>  35.028248 192.168.1.155 -> 192.168.1.21  DNS Standard query AAAA
>  www.google.com 40.030600 192.168.1.155 -> 192.168.1.20  DNS Standard
>  query A www.google.com 45.034562 192.168.1.155 -> 192.168.1.21  DNS
>  Standard query A www.google.com 50.038638 192.168.1.155 -> 192.168.1.20
>   DNS Standard query A www.google.com 55.042885 192.168.1.155 ->
>  192.168.1.21  DNS Standard query A www.google.com 60.047035
>  192.168.1.155 -> 192.168.1.20  DNS Standard query A www.google.com
>  65.051154 192.168.1.155 -> 192.168.1.21  DNS Standard query A
>  www.google.com 70.055199 192.168.1.155 -> 192.168.1.20  DNS Standard
>  query A www.google.com 75.059390 192.168.1.155 -> 192.168.1.21  DNS
>  Standard query A www.google.com
> 
> Other useful output:
> 
> debian:~# cat /etc/resolv.conf
> nameserver 192.168.1.20
> nameserver 192.168.1.21

What kind of name servers are those? From DSL router? Computers running a 
dns server? :-?

It seems you are not receiving any response for your query.

> How should I troubleshoot this?

Try using another dns resolver, i.e., openDNS one:

***
sm01@stt008:~$ dig @208.67.222.222 google.com
***

And put here the result of the query.

Greetings,

-- 
Camaleón


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