LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 08-15-2010, 11:50 PM   #1
Ed Eckelmeyer
LQ Newbie
 
Registered: Aug 2010
Location: Noank, CT
Distribution: Ubuntu 9.10
Posts: 1

Rep: Reputation: 0
Smile Address Resolution Protocol (ARP) problem


I am using Ubuntu 9.10 on a Dell Inspiron 1420 notebook.

Everything has been working ok for months. All of a sudden I can only receive data (either via browser or email client), but I cannot send outbound data.

I can however connect to Google, entering a search term and receive a listing of related URLs, but I cannot connect to any of the listed URLs, getting a message that says "cannot find server, ---- etc" or words to that effect.

Same problem with Earthlink. I can connect to it, and receive e-mail but I cannot send outbound message.

I can probably connect to other "high level" URLs and get the same results. I obviously have an Address Resolution Protocol (ARP) problem but don't know how to fix it other than to re-install Ubuntu OS.

Both Ethernet and wireless work OK and other computers in the house work just fine via the same common router.

Any suggestions as to how to solve the problem without a re-install of OS?

Thanks, Ed
 
Old 08-16-2010, 12:05 AM   #2
paulsm4
LQ Guru
 
Registered: Mar 2004
Distribution: SusE 8.2
Posts: 5,863
Blog Entries: 1

Rep: Reputation: Disabled
Hi -

No, actually is sounds like you probably have a DNS issue.

SUGGESTION:
1. Write down the IP addresses of the DNS server(s) one or more of the computers that work.

2. Write down the IP addresses of the DNS server(s) on your "common router". And your (DSL modem? Cable modem? Other?)

3. Now look at /etc/nsswitch.conf.
Make sure "host" is includes "dns":
http://linuxservertutorials.blogspot...onf-guide.html

4. Finally, look at /etc/resolv.conf.
Make sure one or more of the "known good" DNS IP addresses appears at the TOP of the list.

'Hope that helps .. PSM

PS:
You might want to also look at:
5. /etc/dhclient.conf
http://ubuntuforums.org/showthread.php?t=550265
 
  


Reply

Tags
arp


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
Changing my IP Address and Modifying the ARP table using c++ JaseyJaseJase Programming 4 09-08-2008 01:20 PM
ARP responding with incorrect address Radigast Linux - Networking 3 01-29-2008 10:33 AM
ARP responding with incorrect address Radigast Linux - Networking 1 01-28-2008 05:34 PM
Ethernet address for proxy ARP problem with PPP GuestFox Slackware 2 06-05-2005 08:17 AM
IP address to name resolution problem!! cloudydy Linux - Networking 11 04-05-2005 02:57 PM


All times are GMT -5. The time now is 02:43 PM.

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
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration