Computer Related > VMware/Ubuntu/DNS problem Computing Issues
Thread Author: Focusless Replies: 16
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New Tue 4 Dec 12 11:05 
 VMware/Ubuntu/DNS problem - Focusless
I'm working from home with a VPN connection to the company network. In a Windows 7 command prompt I can ping a company server using both "name" and "name.x.y" to identify the server.

But in Ubuntu running under VMplayer, I can only ping "name", and someone suggested it's a DNS issue. Any ideas what I can do to resolve it?

(I've raised the issue with company IT but it won't be high priority.)
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New Tue 4 Dec 12 11:17 
 VMware/Ubuntu/DNS problem - Focusless
BTW VMplayer Network Adapter setting is 'NAT: Used to share the host's IP address'.
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New Tue 4 Dec 12 12:43 
 VMware/Ubuntu/DNS problem - rtj70
I assume your Ubuntu VM is not setup to have DNS configured to use the company DNS servers?

In this instance using NAT is not the issue - it would be the same if you had the VM bridged to your home or work network. Actually if as I suspect DNS is not setup, then I am surprised you can ping by the short hostname - unless there's an entry for that in your local host file on the Ubuntu VM.

What happens if you run nslookup on the VM? i.e. start nslookup in a shell and then type in the fully qualified domain name of something on your company network.

If you don't want to mess with DNS settings, and it's only one or two servers you need to connect to, you could always put in entries in the local host file on the Ubuntu VM including both the short and fully qualified domain names, e.g.

10.20.1.3 myserver myserver.company.com
Last edited by: rtj70 on Tue 4 Dec 12 at 12:46
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New Tue 4 Dec 12 12:49 
 VMware/Ubuntu/DNS problem - Focusless
>> I assume your Ubuntu VM is not setup to have DNS configured to use the
>> company DNS servers?

How would I find that out?
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New Tue 4 Dec 12 12:56 
 VMware/Ubuntu/DNS problem - car4play
In Ubuntu launch terminal and at the prompt key in :
nslookup apple.com

What does it say?

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New Tue 4 Dec 12 12:58 
 VMware/Ubuntu/DNS problem - Focusless
>> What does it say?

Server: 127.0.0.1
Address: 127.0.0.1#53

Non-authoritative answer:
Name: apple.com
Address: 17.149.160.49
Name: apple.com
Address: 17.172.224.47
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New Tue 4 Dec 12 13:36 
 VMware/Ubuntu/DNS problem - car4play
So 127.0.0.1 (localhost) is doing the name resolution.

you can also try
cat /etc/resolv.conf

Edit that file to be the name server you need to use. i.e. look up what Windows is using and put that address in there.
i.e. edit the file /etc/resolv.conf
line
nameserver x.x.x.x

I haven't used Ubuntu but it probably has a graphical editor to allow you to do this easily.
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New Tue 4 Dec 12 14:11 
 VMware/Ubuntu/DNS problem - Focusless
>> you can also try
>> cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
search localdomain

>> Edit that file

doh :)

I'll try to find out what I need to do to change it; thanks.
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New Tue 4 Dec 12 14:17 
 VMware/Ubuntu/DNS problem - rtj70
Use Network Manager to change the DNS Settings.
Last edited by: rtj70 on Tue 4 Dec 12 at 14:17
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New Tue 4 Dec 12 14:22 
 VMware/Ubuntu/DNS problem - Focusless
>> Use Network Manager to change the DNS Settings.

There's a 'Network Connections', but can't see anything about DNS in there.
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New Tue 4 Dec 12 14:34 
 VMware/Ubuntu/DNS problem - rtj70
I googled for changing DNS entries for Ubuntu and found mention of Network Manager.

If it was only one machine I wanted it to resolve the FQDN to an IP, I'd just edit the host file ;-)
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New Tue 4 Dec 12 14:18 
 VMware/Ubuntu/DNS problem - car4play
oops - yes - the perils of a desktop linux.
This is where I graciously bow out. ;-(

This might be useful though:

www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/
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New Wed 5 Dec 12 22:47 
 VMware/Ubuntu/DNS problem - Focusless
>> www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/

Sorry c4p - thanks for that, but that stuff is a bit beyond my limited linux knowledge. It's not urgent, so for now I'm going to wait for IT.
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New Thu 6 Dec 12 10:01 
 VMware/Ubuntu/DNS problem - rtj70
If it's only one or two servers then add their entries to your /etc/hosts file.
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New Thu 6 Dec 12 10:25 
 VMware/Ubuntu/DNS problem - Focusless
Thanks, but as it's not urgent I'd like IT to find out what's 'wrong' with my setup and hopefully do a proper fix.
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New Thu 6 Dec 12 10:53 
 VMware/Ubuntu/DNS problem - rtj70
You already know what's wrong with it. It is not using the company's DNS servers and therefore cannot resolve a host name to an IP address. The fix is to configure it to use the correct DNS servers.
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New Thu 6 Dec 12 11:03 
 VMware/Ubuntu/DNS problem - Focusless
But as mentioned above I don't know how to do that - I might be able to work it out given enough time, but I've got more important things to do. So better to leave it to someone who (hopefully) knows what they're doing, and it is their job after all. But if you want to provide step-by-step instructions, I'll give it a go.
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