Firewall Configuration for Yum Updates

[Venkata Vuppala]

Hi Experts,

We don't have proxy server in our environment and the server need to go directly to the internet via firewal to redhat. I want to use yum to get the updates, but not sure what all sites. I need to mention to the firewall teams. 

Is there any list of IP-Address or webaddress the yum get the updates. 
Is there any recommended configuration.


Thanks,
Murthy Vuppala