LinuxQuestions.org
Did you know LQ has a Linux Hardware Compatibility List?
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices



Reply
 
Search this Thread
Old 06-14-2010, 07:30 AM   #1
saia
LQ Newbie
 
Registered: Dec 2009
Location: Yogyakarta
Distribution: openSuSE
Posts: 11
Blog Entries: 3

Rep: Reputation: 0
Nameserver (DNS) failure, the connection May not work.


sometimes my internet connection in case of error. when I look under wvdial, there is a message as follows:

Code:
-> Warning, can not find address for `www.suse.de`
-> Warning, address lookup does not work
-> Nameserver (DNS) failure, the connection May not work.
What do these messages mean?
How do I handle this?
 
Old 06-14-2010, 07:44 AM   #2
centosboy
Senior Member
 
Registered: May 2009
Location: london
Distribution: centos5
Posts: 1,137

Rep: Reputation: 116Reputation: 116
Quote:
Originally Posted by saia View Post
sometimes my internet connection in case of error. when I look under wvdial, there is a message as follows:

Code:
-> Warning, can not find address for `www.suse.de`
-> Warning, address lookup does not work
-> Nameserver (DNS) failure, the connection May not work.
What do these messages mean?
How do I handle this?
Code:
cat /etc/resolv.conf

do you have any nameserver addresses in this file??
can you ping either of these nameservers?
 
Old 06-14-2010, 08:39 AM   #3
saia
LQ Newbie
 
Registered: Dec 2009
Location: Yogyakarta
Distribution: openSuSE
Posts: 11
Blog Entries: 3

Original Poster
Rep: Reputation: 0
Quote:
Originally Posted by centosboy View Post
Code:
cat /etc/resolv.conf
This contents of /etc/resolv.conf
Code:
nameserver 203.130.206.250
nameserver 202.134.0.155
and this results from the ping
Code:
PING 203.130.206.250 (203.130.206.250) 56(84) bytes of data.
64 bytes from 203.130.206.250: icmp_seq=1 ttl=60 time=398 ms
64 bytes from 203.130.206.250: icmp_seq=2 ttl=60 time=398 ms

--- 203.130.206.250 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 398.295/398.586/398.878/0.695 ms
 
Old 06-14-2010, 10:28 AM   #4
centosboy
Senior Member
 
Registered: May 2009
Location: london
Distribution: centos5
Posts: 1,137

Rep: Reputation: 116Reputation: 116
Quote:
Originally Posted by saia View Post
This contents of /etc/resolv.conf
Code:
nameserver 203.130.206.250
nameserver 202.134.0.155
and this results from the ping
Code:
PING 203.130.206.250 (203.130.206.250) 56(84) bytes of data.
64 bytes from 203.130.206.250: icmp_seq=1 ttl=60 time=398 ms
64 bytes from 203.130.206.250: icmp_seq=2 ttl=60 time=398 ms

--- 203.130.206.250 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 398.295/398.586/398.878/0.695 ms

are these the same address after you have connected with wvdial?
 
Old 06-15-2010, 04:23 AM   #5
saia
LQ Newbie
 
Registered: Dec 2009
Location: Yogyakarta
Distribution: openSuSE
Posts: 11
Blog Entries: 3

Original Poster
Rep: Reputation: 0
That is the DNS address provided by the internet provider that I use.

And in the configuration file / etc / wvdial.conf

Code:
Auto DNS = 1
 
Old 06-15-2010, 04:55 AM   #6
centosboy
Senior Member
 
Registered: May 2009
Location: london
Distribution: centos5
Posts: 1,137

Rep: Reputation: 116Reputation: 116
Quote:
Originally Posted by saia View Post
That is the DNS address provided by the internet provider that I use.

And in the configuration file / etc / wvdial.conf

Code:
Auto DNS = 1
those ping times are quite heavy.

can you dig www.suse.de and post the results here.
i want to check on the Query time.

Code:
dig www.suse.de
 
Old 06-15-2010, 08:24 AM   #7
salasi
Senior Member
 
Registered: Jul 2007
Location: Directly above centre of the earth, UK
Distribution: SuSE, plus some hopping
Posts: 3,919

Rep: Reputation: 779Reputation: 779Reputation: 779Reputation: 779Reputation: 779Reputation: 779Reputation: 779
Quote:
Originally Posted by centosboy View Post
those ping times are quite heavy.
(assuming heavy = long = slow) Yeah, they will be, he's on dial-up.

If nothing else goes wrong apart from this error message, you can probably ignore it. There is a check on start-up of your connection that domain name services look-up works correctly (and your system is failing that test). If nothing else goes wrong, like failure to find websites that you know are really there, it probably only means that this test is being carried out before the link is really up-and-running or the timeout is set slightly too short for the speed of your connection and the speed of those nameservers.

If you are occasionally getting web pages not found and/or your performance is poor, ping your nameservers and check that the ping response times don't occasionally go through the roof (some of the lower cost isps don't really have adequate nameservers, particularly for their older, lower cost, services) and there may be a case for changing to other nameservice providers.
 
Old 07-06-2010, 12:11 PM   #8
saia
LQ Newbie
 
Registered: Dec 2009
Location: Yogyakarta
Distribution: openSuSE
Posts: 11
Blog Entries: 3

Original Poster
Rep: Reputation: 0
well,I can not get online so I can not log in to provide additional information.

I re-install packages in the hope of getting the network configuration is still the default or standar or raw (which one of those words in english is use, I'm sorry I'm not fluent in English).
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
dns nameserver tkbonito Linux - Networking 3 07-23-2009 06:45 PM
I screwed something on nameserver/dns centosfan Linux - Server 2 01-29-2008 10:27 AM
BT Broadband DNS Nameserver Jaymac Linux - Networking 2 05-28-2004 10:36 AM
Gentoo DNS(nameserver)! Xerop Linux - Networking 3 05-20-2004 07:47 AM
fetchmail nameserver failure shellcode Linux - Software 1 02-10-2004 10:56 PM


All times are GMT -5. The time now is 03:07 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration