Hi, I upgraded freeradius version from 2.0.2 to 2.1.12 and also the openssl version from 0.9.7 to 0.9.8n. The issue I am facing now is with peap mschapv2 windows client not able to authenticate with my radius server. The error is [peap] No SSL info available. Waiting for more SSL data. I added few more logs and I could see the callback function cbtls_msg returning due to the arg (state) being NULL in freeradius-server-2.1.12/src/modules/rlm_eap/libeap/cb.c void cbtls_msg /* * Work around bug #298, where we may be called with a NULL * argument. We should really log a serious error */ if (!arg) return; Not sure what the bug298 is all about and also what could be the possible reason for the arg (state) to be NULL? Regards, Winson