Can connect to 74.125.239.39 but not google.com

caek$ · 10-26-2014, 10:54 PM

I'm on Lubuntu and trying to connect to the internet by sharing my connection from my macbook to my linux machine.

Whenever I try to ping to google.com its unresponsive, but when I type "ping 74.125.239.39" in the terminal, it works fine. Same problem in firefox.

Thanks

suicidaleggroll · 10-26-2014, 11:28 PM

Your DNS is not working. Did you set up the network connection on Lubuntu with a static IP or DHCP?

What if you run

Code:

sudo echo 8.8.8.8 >> /etc/resolv.conf

and try again?

caek$ · 10-27-2014, 07:54 AM

Quote:

Originally Posted by suicidaleggroll

Your DNS is not working. Did you set up the network connection on Lubuntu with a static IP or DHCP?

What if you run

Code:

sudo echo 8.8.8.8 >> /etc/resolv.conf

and try again?

Heres what I got:

Code:

sudo echo 8.8.8.8 >> /etc/resolv.conf

Code:

bash: /etc/resolv.conf: Permission denied

I'm not completely sure, on my network settings my IPv4 settings are automatic (DHCP) and my IPv6 settings are automatic (address only)

ondoho · 10-27-2014, 02:40 PM

i also get that permission denied error.

if i type "su" first, i can enter the command. i guess it has to do with the ">>".

but i think if you already have 2 nameservers in resolv.conf, appending a 3rd will not help?

so maybe you should:

Code:

$ su
# mv /etc/resolv.conf /etc/resolv.conf.bak
# echo 8.8.8.8 > /etc/resolv.conf
#

if that gives you a working internet connection, we are one step further, but your problem is not solved yet.

suicidaleggroll · 10-27-2014, 03:30 PM

Quote:

Originally Posted by ondoho

if i type "su" first, i can enter the command. i guess it has to do with the ">>".

Ah yes you're probably right, it's most likely doing "sudo echo 8.8.8.8" and then piping the output of that to /etc/resolv.conf as the regular user, which won't work.

The ">>" would need to be inside of the sudo command. Probably something like

Code:

sudo "echo 8.8.8.8 >> /etc/resolv.conf"

but since I don't use Ubuntu or any of its derivatives I can't test it here.

The easier way would be to use "sudo -i" to get a real root shell, and then just a simple "echo 8.8.8.8 >> /etc/resolv.conf".

Or disable Ubuntu's stupid "security" policy entirely and switch back to the regular way of doing things with an unprivileged regular user and a separate root user that you switch between with su.

Yes if there are already 2 in resolv.conf, adding a third wouldn't help, but I suspect he doesn't have anything in that file. A simple "cat /etc/resolv.conf" would answer that though.

caek$ · 10-27-2014, 10:58 PM

Quote:

Originally Posted by ondoho

i also get that permission denied error.

if i type "su" first, i can enter the command. i guess it has to do with the ">>".

but i think if you already have 2 nameservers in resolv.conf, appending a 3rd will not help?

so maybe you should:

Code:

$ su
# mv /etc/resolv.conf /etc/resolv.conf.bak
# echo 8.8.8.8 > /etc/resolv.conf
#

if that gives you a working internet connection, we are one step further, but your problem is not solved yet.

I tried

Code:

sudo su

Because without it I would get an authentication failure.
So now I'm in root and I typed the following, according to your instructions

Code:

mv /etc/resolv.conf /etc/resolv.conf.bak
echo 8.8.8.8 > /etc/resolv.conf

and the output was nothing, so I guess its successful?

Quote:

Originally Posted by suicidaleggroll

Ah yes you're probably right, it's most likely doing "sudo echo 8.8.8.8" and then piping the output of that to /etc/resolv.conf as the regular user, which won't work.

The ">>" would need to be inside of the sudo command. Probably something like

Code:

sudo "echo 8.8.8.8 >> /etc/resolv.conf"

but since I don't use Ubuntu or any of its derivatives I can't test it here.

I tried

Code:

sudo "echo 8.8.8.8 >> /etc/resolv.conf"

and got "command not found"

Quote:

Originally Posted by suicidaleggroll

The easier way would be to use "sudo -i" to get a real root shell, and then just a simple "echo 8.8.8.8 >> /etc/resolv.conf".

Or disable Ubuntu's stupid "security" policy entirely and switch back to the regular way of doing things with an unprivileged regular user and a separate root user that you switch between with su.

Yes if there are already 2 in resolv.conf, adding a third wouldn't help, but I suspect he doesn't have anything in that file. A simple "cat /etc/resolv.conf" would answer that though.

"echo 8.8.8.8 >> /etc/resolv.conf" works
and "cat /etc/resolv.conf" outputs 8.8.8.8, so I got 8.8.8.8 in that file.

I haven't had success with the DNS serves yet, but thanks for all your guys help so far, I really appreciate it.

ondoho · 10-28-2014, 02:51 PM

Quote:

Originally Posted by caek$

and the output was nothing, so I guess its successful?

yes.
but do you get a working internet connection with that?