Hi I am using centos 5. yum saying following error..

[root@zeus Desktop]# yum grouplist Loading "installonlyn" plugin Setting up Group Process Setting up repositories Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=i386&repo=os error was [Errno 14] HTTP Error 407: Proxy Authentication Required Error: Cannot find a valid baseurl for repo: base

my system is behind corporate filter. Is there any where to use yum. help me out in this. in some forum it says we need NTLM to handle this...

by john

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