Thanks for your valuable suggestions and quick reply. I still have one issue, I have update the script as per your suggestion but still seeing the same p +roblem. here is my client perl script $sock = IO::Socket::INET->new( PeerAddr => '12.31.22.14', PeerPort => 38752, Proto => "tcp", Type => SOCK_STREAM, ); IO::Socket::SSL->start_SSL( $sock, 'SSL_startHandshake' => 0 ) || die "Encountered an SSL handshake problem:".IO::Socket::SSL::errstr(); this fails with the following erro "Encountered an SSL handshake problem:SSL connect attempt failed error:00000000:lib(0):func(0):re +ason(0) at " The server code is /* initialize SSL library */ (void)SSL_library_init(); SSL_load_error_strings(); ssl_ctx = SSL_CTX_new(SSLv23_server_method()); (void)SSL_CTX_set_options(ssl_ctx, SSL_OP_ALL); ssl = SSL_new(ssl_ctx); (void)set_debug_state(ssl_ctx, NULL); SSL_set_accept_state(ssl); (void)SSL_set_session(ssl, NULL); (void)SSL_clear(ssl); ssl_bio = sslc_BIO_new_socket(acceptfd, BIO_NOCLOSE); ssl_err = sslc_SIO_socket_ioctl(acceptfd, FIONBIO, &non_block); /* 1 = non-blocking */ SSL_set_bio(ssl, ssl_bio, ssl_bio); if ( (ssl_err = SSL_do_handshake(ssl)) != 1) the above if condition fails with the following message, SSL_ERROR_WANT_READ: I have handled the exceptions appropriately and loaded the server certificates using one of our Api. The version of the modules I am using are Net::SSLeay '1.08' IO::Socket::SSL '0.96' DO I need to upgrade the above Perl modules. Thanks Amar