Hi, all I am using rlm_sim_file module to perform the authorization function, so I have to add "sim_file" before "eap" in the authorize{} of radiusd.conf. In general, the authorization function can set the "Auth-Type" automatically, such as rlm_file or rlm_sql. But I find that the rlm_sim_file does not do that. In the rlm_sim_triplets of Doc, it says that :If this module is successful at retrieving three sets of triplets, then the EAP-Type: attribute will be set to SIM. The EAP module itself will set the Auth-Type to EAP when it sees the EAP-Message attribute. I only find that Auth-Type is set in the eap_authorize function. In my opinion, if rlm_sim_file is used, the eap_authorize will not be executed. So , I do not know how Auth-Type is set to EAP when using rlm_sim_file module? Best wishes! Lishuai.zhao