Yum via Proxy

Edit /etc/yum.conf

Add

proxy=http://<Proxy-Server-IP-Address>:<Proxy_Port>

proxy_username=<Proxy-User-Name>

proxy_password=<Proxy-Password> 

Example:

proxy=http://192.168.1.0:3128

proxy_username=sysops

proxy_password=passw0rd!