Problems with yum downloads using windows proxy server
 

Hi guy's,

Wondering if someone can help me. I'm trying to set up a virtual server on vmware with centos to do some testing on a wiki. I'm having a major issue with yum whilst trying to update and setup the xwindow app. I'm behind a windows proxy server, so i've installed ntlmaps and configured it with the proxy settings, and to listen to port 100. I have then set the http_proxy variable to localhost:100, and this gives me access to the internet. I have then set yum up to use the same settings and yum to will now access the internet ok. However randomly through any part of the update/download with yum, I get this error.

Loading "installonlyn" plugin
Setting up Group Process
Setting up repositories
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...h=i386&repo=os error was
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Error: Cannot find a valid baseurl for repo: base
[root@localhost etc]# vi yum.conf
[root@localhost etc]# yum groupinstall 'X Window System' 'GNOME Desktop Environment' 'Sound and Video'
Loading "installonlyn" plugin
Setting up Group Process
Setting up repositories
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...h=i386&repo=os error was
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Error: Cannot find a valid baseurl for repo: base
[root@localhost etc]# vi yum.conf
[root@localhost etc]# yum groupinstall 'X Window System' 'GNOME Desktop Environment' 'Sound and Video'
Loading "installonlyn" plugin
Setting up Group Process
Setting up repositories
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...h=i386&repo=os error was
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Error: Cannot find a valid baseurl for repo: base
[root@localhost etc]# vi yum.conf
[root@localhost etc]# yum groupinstall 'X Window System' 'GNOME Desktop Environment' 'Sound and Video'
Loading "installonlyn" plugin
Setting up Group Process
Setting up repositories
Could not retrieve mirrorlist http://mirrorlist.centos.org/?releas...h=i386&repo=os error was
[Errno 4] IOError: <urlopen error (111, 'Connection refused')>
Error: Cannot find a valid baseurl for repo: base

Has anyone ever had any issues similar to this before? Any help would be much appreciated as I have exhausted all options at the moment.

Cheers

Glyn Thomas