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[ubuntu] DNS nameserver problems after changing ISP

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http://ubuntuforums.org – Hi All, I'm becoming more and more frustrated with Ubuntu. :( I'm using the Precise Pangolin distro. I changed ISP provider from Comcast to RCN. While my macbook laptop and Windows PC smoothly embraced the new ISP, my Ubuntu PC couldn't automatically detect the DNS servers. I have internet but unable to resolve anything. In /etc/resolv.conf: nameserver 127.0.0.1 search cable.rcn.com I've played with gnome-control-center network and tried to force the system to accept the DNS servers of RCN, but it seemed hopeless. I tried a prepend domain-name-servers to Google DNS in dhc (Hardware)

dayu's picture
Submitted by dayu on 06/02/2012 – Made popular on 06/02/2012

Stories similar to [ubuntu] DNS nameserver problems after changing ISP

Hi,

I am using Ubuntu 9.04 (x86-64).

My internet connection is not working, i've tried to fix it and the issue seems to be with DNS. I can ping google's IP, but i can ping it URL.

I have used the GUI network manager(from Gnome's equivalent of the Windows system tray), to add the DNS IP addresses to the IPv4 wired connection - that hasn't helped.

I have two internal dns servers set up and all my servers have both of them in the resolv.conf Our main dns server went down and suddenly no server could see each other. I edited a few of the servers resolv.conf manually and committed out the first (down) dns server and that machine would instantly be able to ping again.

Try to add DNS servers to /etc/resolv.conf.This configuration usually works well:/etc/resolv.conf: # OpenDNS servers nameserver 208.67.222.222 nameserver 208.67.220.220

Linkas https://bbs.archlinux.org/profile.php?id=55541

2012-09-03T10:11:05Z

Hi all, I have a slight problem. Here is my resolv.conf entry:

search domain.com nameserver sys1 nameserver sys2 nameserver sys3

Hello, I'm experiencing a weird DNS issues.

DNS Settings 3 years 21 weeks ago

I am trying to troubleshoot a DNS issue. I added a bogus nameserver as the primary in resolv.conf and a legitimate on as the secondary. I modified the timeout to 0 seconds so it finds the 2nd DNS server more quickly. However, when I try to ping another server, it still waits about 2 seconds then finally gets a response. I do the same test with a Windows server and the ping response is immediate.

In /etc/resolv.conf, I've changed the nameserver line to a new IP address. After saving and exiting, I run service network restart. I then go open /etc/resolve.conf again and see that the IP address I changed is now back to what it was prior to changing.

Why is this happening?

I'm trying to use 2 DNS servers on ubuntu for 2 wildcard urls.

example_a.dev and example_b.dev

example_a.dev is my local machine(with bind9) and example_b.dev is a remote dns machine(running ubuntu with bind9).

I've configured my resolve.conf like this.

search example_a.dev nameserver 192.168.1.1 search example_b.dev nameserver 192.168.1.2

But example_b.dev is never resolving.

I also tried u

My /etc/resolv.conf shows:

# Generated by NetworkManager domain someuniversity.ac.uk search someuniversity.ac.uk nameserver 128.85.161.265 nameserver 128.85.161.241

I understand nameserver but what is the usefulness and relevance of "domain" and "search"?

Thanks .