I have installed FC5 but when I run YUM is get lots of different errors so I ran yum clean all. Most errors went away but now I have: Header not complete I tried yum clean all again but that did not do anything. I am behind a transparent proxy server. Are there any known problems with proxy servers? Does FC5 YUM use any special ports? Does anyone know what port YUM uses to communicative? Is it a TCP port? Thanks, Roger