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I boot the Ubuntu 12.04 desktop ISO CD with VirtualBox, but get no DNS. I.e., eth0 has its IP address, but DNS resolving always fails.

I tried VirtualBox bridged networking, then NAT, but for both case DNS resolving failed. This is a pure Ubuntu 12.04 issue because if I switch my VirtualBox boot CD to something else (grml64_2011.12.iso), network & DNS resolving is just fine.

I.e., Ubuntu 12.04 can't find my local DNS server and use 127.0.0.1 in /etc/resolv.conf, while other distros can find and use my local DNS server just fine.

Any ideas?

Thanks

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Can you look at the answers in these two similar 'DNS not working' questions and see if they help? –  Tom Brossman Sep 2 '12 at 7:23
    
Firewall on host (which OS?) blocking the virtual machine? –  Takkat Sep 2 '12 at 7:26
    
@Takkat, no, not Firewall on host, I don't use firewall on host. Moreover, grml CD is working fine out of the box. –  sfxpt Sep 2 '12 at 13:32
    
@TomBrossman, thanks, I know how to fix it, but I'm just wondering why Ubuntu 12.04 ISO doesn't work out of the box, while others can. Thanks. –  sfxpt Sep 2 '12 at 13:34
    
I believe this is the direct cause to my other question, askubuntu.com/questions/183132/… –  sfxpt Sep 2 '12 at 13:35
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