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Old 06-11-2009, 09:01 PM   #1
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Registered: Jul 2008
Distribution: Ubuntu 11.04, Debian Squeeze, CentOS 5.6
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Question Internet not accessable but Intranet is

I just installed Ubuntu Server on a box I had sitting around.

After installing it, I configured the network interfaces and DNSs (both manually, of course). There are 3 adapters in it: 2 onboard gigabit ones and an old Intel 10/100 card. They all get recognized and they all can access the local network, as well as be accessed by computers on the local network.

The problem comes when I try and ping Google, for example. It does resolve, but nothing comes back. No errors. No response. Not even "destination unreachable"!

One symptom to note, it seemed to like to reload Samba every few minutes. I removed Samba. No change.

Also, when I run "dhclient eth<some adapter number>", it works on that adapter, even after reboot. I want it to be a static address, like all web servers should be.

Any thoughts?

Old 06-12-2009, 01:54 AM   #2
Stéphane Ascoët
Registered: Feb 2004
Location: Orleans, 120 km south of Paris
Distribution: Mandrake, Freeduc (the one I'm making), Slackware, MacOS X
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Post Neetwork configuration

Use ifconfig to set the network you want.
Old 06-12-2009, 10:07 AM   #3
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try using route and see what the output is. YOu should have an entry like

default   gateway x.x.x.x
If you do not have that entry you would be unable to get out of your network ( with multiple network cards you may have many default routes)

If you want/need additional help post outputs of "ifconfig" and "route" to start
Old 06-12-2009, 03:30 PM   #4
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Distribution: Ubuntu 11.04, Debian Squeeze, CentOS 5.6
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Turns out that multiple network connections were confusing Ubuntu. I unplugged them all and restarted the network and it magically worked.


dhclient, network, samba, server, ubuntu

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