What does the module rlm_krb5 do?

[John Mok]

Hi,

I am new to FreeRADIUS. I would like to set up FreeRADIUS, such that the 
AS proxies the Kerberos authentication request from the access point to 
the Kerberos KDC and the access point grants access to the wired network 
upon successful authentication.

I googled about the subject and found the following article about the 
module rlm_krb5 :-

http://wiki.freeradius.org/Rlm_krb5

http://archives.free.net.ph/message/20060104.153134.68c5be76.en.html

Is there anyone knows what the module rlm_krb5 does? Whether it is the 
module I need to use to do the job?

Thanks a lot.

John Mok