Dear Sirs: How could write a module the function as hereunder: 1. Keep /usr/local/etc/raddb/users empty. 2. All Access-Request are all return Access-Accept. 3. I wish the function like rlm_sql (just modify authorization) Could you give me sample code. My config is: /usr/local/etc/raddb/sites-available/default authorize { preprocess chap mschap suffix eap { ok = return } unix #files #Alex:sql mymodule expiration logintime pap } authenticate { Auth-Type PAP { pap } Auth-Type CHAP { chap } Auth-Type MS-CHAP { mschap } unix eap } preacct { preprocess acct_unique suffix files } accounting { detail unix #Alex:sql radutmp attr_filter.accounting_response } session { radutmp } post-auth { exec Post-Auth-Type REJECT { attr_filter.access_reject } } pre-proxy { } post-proxy { eap } Thanks.