6.15. yum-plugin-protectbase

This extension allows certain repositories to be protected. Packages in protected repositories can not be overridden by packages in non-protected repositories even if the unprotected repository has a newer version.

6.15.1. Configuration

/etc/yum/pluginconf.d/protectbase.conf

		
[main]
enabled = 1

enabled = 0|1: Enable the extension at system wide.

Later you need to configure the .repo files for each repository to declare which will be protected or not adding protect=1 or protect=0.