how to limit users access by groups using radgroucheck

[RAZAFIMBELO Faliharinohatra Rindra]

Hi all,

         I'm new to freeradius and I would like to know if someone can 
tell me how to limit users access by groups using radgroupcheck. I have 
made some researchs and I saw that radgroupcheck didn't reject users 
even if there is a mismatch attribute. I'd like to have a confirmation 
about this thing if it's true or not. I know with radcheck we can 
specify attribute like NAS-Identifier or NAS-IP-Address ... to limit 
user's access but i'm searching for a solution using groups. Can someone 
help me please?

Thx

-- 
RAZAFIMBELO Faliharinohatra