On of our systems got infected by a botnet-like system, which caused us to reformat it. We installed Fedora 4 on a new IP address, so we could test everything before putting it back to the old IP. Yum worked fine at that time, providing us with updates to the latest packages. After the change to the old IP, we were unable to use Yum. We also aren't able to connect to the RedHat site, which appears to be the same IP to which Yum connects. This is what we get : Yum Version: 2.4.0 COMMAND: yum -d 50 Installroot: / Setting up Update Process Setting up repositories Cannot find a valid baseurl for repo: updates-released Error: Cannot find a valid baseurl for repo: updates-released Any idea what's going on ? Is RedHat blocking certain hosts ?