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Old 10-30-2012, 04:51 PM   #1
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Registered: Oct 2012
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Red Hat Networking Problem

I am new to Linux and am installing my first copy of Red Hat 5.4 x86 64 bit on a virtual server. The physical box is a Dell PowerEdge 2900 with dual quad core processors and 16 GB ram. The Network card is a 1 Gb Intel EtherExpress/1000 card that I am connecting through to access the vSphere 5 hypervisor. I was able to install the Linux OS and everything looks good. I gave the RH VM 100 GB of disk space. If I look at the configuration on the Vsphere for networking everything looks good. However my VM server will not connect to the internet. The network card says it is configured and active but will not connect. When I try I get nothing, the Firefox says Address not Found for any address entered. I have used both static and dynamic IPs for my system.

Any Ideas where to look?
Old 10-30-2012, 08:53 PM   #2
Registered: Oct 2012
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It could be a wrong dns configuration.
Are you able to ping a machine of your network using the IP (not the hostname) ?
Same thing for an Internet website (e.g.: ?
Check /etc/resolv.conf (if not using DHCP)
Old 10-30-2012, 09:56 PM   #3
John VV
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rhel 5.4 is OLD
it is even OLD in the older 5 series
in the rhel5 series RHEL 5.8 is the current

the current RHEL is 6.3

please stay current

Also red hat RHEL is not free , you MUST buy a yearly support contract

also rhel 5.4 might be older than the hardware
if so then it might not be supported

see the support page for rhel
a license IS REQUIRED
for the desktop license
and the server license

if you are not going to buy the required license , then do not use RHEL .

instead install one of the FREE rebuilds like CentOS 6.3
( unless you MUST stay with the OLD 5 series then CentOS 5.8 )

also you are aware that a Virtual install can not use wireless
it only sees a wired hard line

in the VM how did you configure the virtual internet connection

Last edited by John VV; 10-30-2012 at 09:59 PM.
Old 10-31-2012, 10:11 AM   #4
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This is a licensed copy of Red Hat and I am using this version to learn and play with Linux as a test box. Our newer copies are in and on production servers. My connection is through a cat 5e wired connection. This was a server that had been running Linux in the past before being taken out of production and moved to a test box.

I should have stated it better. My issue is connecting from my Red Hat Server to anything through my VM server. I cannot ping anything (DNS Server, Gateway, Switches, another Server, or the Internet) through the VM Linus server. (Everything was set up properly by our sys admin. DNS, Gateway, etc.) I know the NIC card is working as I can connect to the physical server through vSphere and hence to the VM Linux server and its GUI and open a terminal window, issue commands etc. I just cannot connect back out of the VM Linux server to our network or the internet. I have a lot of experience with Windows servers but not Linux. I worked with NEXT in the early 90s but have not worked with Linux until I started this job. I am going to use this server and instance of Linux as a test box so I don’t screw up any of our live servers.
Old 10-31-2012, 10:38 AM   #5
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Well, there can be many reasons for the network not to work. And if your system admin has setup everything then he should have checked it also. Anyway, I'm just going to give a few hints here:

1. Can you connect to the internet from the host OS? if yest then, there is no problme with NIC and it must have something to do with the guest.
2. Check the network configurations from the host first and then check from the guest OS, i.e. Linux. If the IP address/subnet is correctly configured. You can use ifconfig command for this. See also your interface is up (and blinking).
3. Use ping from a terminal, see if you can ping your gateway/router ip. See if you can ping beyond it, for example:
4. You can also use route -n, to see if there is a default route exists and it is correct.
5. Check /etc/resolv.conf file for dns server ip. You should get it from your sys admin.

for further help, please post ifconfig, route -n and ping command output.

Old 10-31-2012, 10:38 PM   #6
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Simply contact redhat support, they will be happy to help, thats what your paying for....


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