You can check it with the rpm-protocol tool from your redhat distribution.
Or you can check it with rpm. I don't know the exact option settings, but the man pages are good.
I remeber, I figured it out with the man pages, and that has something to say ;-)
You will find all needed rpm's via www.redhat.com
-> download -> search by keyword or www.rpmseek.com.
Clemens von Musil
P.S: Consider using Webmin, if you take care for more servers. I am very happy with this tool!