To enable yum operations to use a proxy server you should first add the following parameter to /etc/yum.conf
proxy=http://yourproxy:8080/
where yourproxy is the name of the proxy server you want to access and 8080 is the proxy port. If the server requires authentication you can specify the login credentials like:
proxy=http://username:password@yourproxy:8080/
The rpm package manager makes use of the proxy environment variable. This can be set system wide in /etc/profile or user specific in ~/.bash_profile::
export http_proxy=http://yourproxy:8080/ export ftp_proxy=http://yourproxy:8080/
To use wget throug a proxy server add the following lines to /etc/wgetrc
http_proxy = http://yourproxy:8080/ ftp_proxy = http://yourproxy:8080/
In both cases, login information can be set like in the example above.
