hi,all I use the debug callback fucntion just like s_server does at the server side,why I always get the following error at the beginning of the session (when call SSL_accept): SSL_accept:before/accept initialization read from 00339F30 [00373828] (11 bytes => -1 (0xFFFFFFFF)) SSL_accept:error in SSLv2/v3 read client hello A ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]