[CentOS] Could not retrieve mirror list while using yum command

Fri Apr 2 05:21:36 UTC 2010
Jatin Davey <jashokda at cisco.com>

Hi Kwan

I executed the following on the host that was having problem:

[root at localhost yum.repos.d]# wget http://www.google.com
--22:14:25--  http://www.google.com/
Resolving www.google.com... 74.125.19.105, 74.125.19.99, 74.125.19.106, ...
Connecting to www.google.com|74.125.19.105|:80... failed: Connection 
timed out.
Connecting to www.google.com|74.125.19.99|:80... failed: Connection 
timed out.

Which shows that i am not getting connected to the internet.

Now coming to the second point on whether i am using a proxy or not ? , 
I really dont know whether i am using a proxy or not. When i used a 
similar CentOS box on which i was successful in connecting to the 
internet i issues the same command as mentioned above and it got 
connected and downloaded the web file.

How do i find whether i have proxy configured on the host that is 
connecting to the internet ?
If you can guide me through this then i can replicate the configuration 
from the above host to the hosts that are not getting connected to the 
internet.

Thanks
Jatin

On 4/2/2010 10:28 AM, Kwan Lowe wrote:
> On Thu, Apr 1, 2010 at 11:38 PM, Jatin Davey<jashokda at cisco.com>  wrote:
>    
>> Hi
>>
>> I wanted to download and install the net-snmp package. Usually on my
>> other CentOS boxes i use the following command to do it:
>>
>> yum install net-snmp
>>
>> I was able to successfully install net-snmp on 4 of my CentOS boxes but
>> not on one of them. It reports me the following error message:
>>
>> [root at localhost yum.repos.d]# yum install net-snmp
>> Loaded plugins: fastestmirror
>> Determining fastest mirrors
>> Could not retrieve mirrorlist
>> http://mirrorlist.centos.org/?release=5&arch=i386&repo=os error was
>> [Errno 4] IOError:<urlopen error (110, 'Connection timed out')>
>> Error: Cannot find a valid baseurl for repo: base
>>
>>      
> Can you access the internet from that machine? Do you require a proxy
> to connect?
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