Hi I noticed today that all my Centos servers are giving same error on "yum update". Error is: ---------------------------------- Loading "installonlyn" plugin Setting up Update Process Setting up repositories rpmforge 100% |=========================| 1.1 kB 00:00 Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=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 ---------------------------------- Servers are scattered around in different networks. Yum update has been workin OK on all of them. Centos 4.5 servers are giving similar error, but with less detail. Servers are relaying heavily on DNS for everyday work, so that should rule out DNS issues (all are running caching-nameservers). Is there any problem with repos? Anybody else having same erors? all the best Vahur