Hi, I'm using stunnel to communicate with FIX server. In order to do that, I disabled SSLv2 and SSLv3 and set the sslVersion to TLSv1. It seems like stunnel keeps trying using SSLv3 handshake, which isn't working. This is the configuration: client = yes debug = 7 output=stunnel.log cert = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ; Turning for LMAX options = NO_SSLv2 options = NO_SSLv3 [LMAX-fix-tunnel-DEMO-Trading] sslVersion = TLSv1 accept = 40001 connect = fix-ate.lmaxtrader.com:443 stunnel log: 2015.02.04 12:10:31 LOG7[12516]: Service [LMAX-fix-tunnel-DEMO-MktData] started 2015.02.04 12:10:31 LOG5[12516]: Service [LMAX-fix-tunnel-DEMO-MktData] accepted connection from 127.0.0.1:59475 2015.02.04 12:10:31 LOG6[12516]: s_connect: connecting 91.215.165.69:443 2015.02.04 12:10:31 LOG7[12516]: s_connect: s_poll_wait 91.215.165.69:443: waiting 10 seconds 2015.02.04 12:10:31 LOG5[12516]: s_connect: connected 91.215.165.69:443 2015.02.04 12:10:31 LOG5[12516]: Service [LMAX-fix-tunnel-DEMO-MktData] connected remote server from 10.0.0.62:59476 2015.02.04 12:10:31 LOG7[12516]: Remote socket (FD=620) initialized 2015.02.04 12:10:31 LOG6[12516]: SNI: sending servername: fix-md-ate.lmaxtrader.com 2015.02.04 12:10:31 LOG7[12516]: SSL state (connect): before/connect initialization 2015.02.04 12:10:31 LOG7[12516]: SSL state (connect): SSLv3 write client hello A Already burned around 4 hours understanding what I'm doing wrong, will be glad if you could help me. Thanks in advance, Or. -- *Attention:* This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error, please notify the sender immediately by replying to this message, and delete the original message from your system without making a copy. This e-mail is attributed to the sender and does not necessarily reflect the view of Markets Pulse P.S. Ltd. or any affiliate. Please consider the environment before printing this email.