Hi,

I'm trying to tunnel TLS connection to a turn server
https://code.google.com/p/rfc5766-turn-server/

The connection is closed with;
SSL socket closed on SSL_read

2014.04.12 13:40:15 LOG7[14983:140499885700864]: No limit detected for the number of clients
2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=3 allocated (non-blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=4 allocated (non-blocking mode)
2014.04.12 13:40:15 LOG5[14983:140499885700864]: stunnel 4.42 on x86_64-pc-linux-gnu platform
2014.04.12 13:40:15 LOG5[14983:140499885700864]: Compiled/running with OpenSSL 1.0.1 14 Mar 2012
2014.04.12 13:40:15 LOG5[14983:140499885700864]: Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6
2014.04.12 13:40:15 LOG5[14983:140499885700864]: Reading configuration from file /etc/stunnel/stunnel.conf
2014.04.12 13:40:15 LOG7[14983:140499885700864]: PRNG seeded successfully
2014.04.12 13:40:15 LOG6[14983:140499885700864]: Initializing SSL context for service ssl
2014.04.12 13:40:15 LOG4[14983:140499885700864]: Insecure file permissions on /etc/stunnel/key.pem
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate: /etc/stunnel/cert.pem
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate loaded
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Key file: /etc/stunnel/key.pem
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Private key loaded
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Could not load DH parameters from /etc/stunnel/cert.pem
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Using hardcoded DH parameters
2014.04.12 13:40:15 LOG7[14983:140499885700864]: DH initialized with 2048-bit key
2014.04.12 13:40:15 LOG7[14983:140499885700864]: ECDH initialized with curve prime256v1
2014.04.12 13:40:15 LOG7[14983:140499885700864]: SSL options set: 0x00000004
2014.04.12 13:40:15 LOG6[14983:140499885700864]: SSL context initialized
2014.04.12 13:40:15 LOG5[14983:140499885700864]: Configuration successful
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=5 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=10 allocated (blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: accept socket: FD=11 allocated (non-blocking mode)
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Option SO_REUSEADDR set on accept socket
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl bound to 0.0.0.0:443
2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl opened FD=11
2014.04.12 13:40:15 LOG7[14989:140499885700864]: Created pid file /stunnel4.pid
2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=0 allocated (non-blocking mode)
2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=0 from 192.168.56.1:54561
2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=1 allocated (non-blocking mode)
2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=1 from 192.168.56.1:54562
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl started
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on local socket
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Waiting for a libwrap process
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Acquired libwrap process #0
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl started
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on local socket
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Waiting for a libwrap process
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Acquired libwrap process #1
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Releasing libwrap process #0
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Released libwrap process #0
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl permitted by libwrap from 192.168.56.1:54562
2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl accepted connection from 192.168.56.1:54562
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): before/accept initialization
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client hello A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server hello A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write certificate A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write key exchange A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server done A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Releasing libwrap process #1
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Released libwrap process #1
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl permitted by libwrap from 192.168.56.1:54561
2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl accepted connection from 192.168.56.1:54561
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): before/accept initialization
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client hello A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server hello A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write certificate A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write key exchange A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server done A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client key exchange A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read finished A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write session ticket A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write change cipher spec A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write finished A
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 items in the session cache
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 client connects (SSL_connect())
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 client connects that finished
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 client renegotiations requested
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    2 server connects (SSL_accept())
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    1 server connects that finished
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 server renegotiations requested
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 session cache hits
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 external session cache hits
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 session cache misses
2014.04.12 13:40:17 LOG7[14989:140499885692672]:    0 session cache timeouts
2014.04.12 13:40:17 LOG6[14989:140499885692672]: SSL accepted: new session negotiated
2014.04.12 13:40:17 LOG6[14989:140499885692672]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD
2014.04.12 13:40:17 LOG7[14989:140499885692672]: remote socket: FD=2 allocated (non-blocking mode)
2014.04.12 13:40:17 LOG6[14989:140499885692672]: connect_blocking: connecting 192.169.56.300:3478
2014.04.12 13:40:17 LOG7[14989:140499885692672]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds
2014.04.12 13:40:17 LOG5[14989:140499885692672]: connect_blocking: connected 192.169.56.300:3478
2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl connected remote server from 192.169.56.300:59744
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Remote FD=2 initialized
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on remote socket
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client key exchange A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read finished A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write session ticket A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write change cipher spec A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write finished A
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 items in the session cache
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 client connects (SSL_connect())
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 client connects that finished
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 client renegotiations requested
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    2 server connects (SSL_accept())
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    2 server connects that finished
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 server renegotiations requested
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 session cache hits
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 external session cache hits
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 session cache misses
2014.04.12 13:40:17 LOG7[14989:140499885790976]:    0 session cache timeouts
2014.04.12 13:40:17 LOG6[14989:140499885790976]: SSL accepted: new session negotiated
2014.04.12 13:40:17 LOG6[14989:140499885790976]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD
2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL socket closed on SSL_read
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Sending socket write shutdown
2014.04.12 13:40:17 LOG5[14989:140499885692672]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket
2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl finished (1 left)
2014.04.12 13:40:17 LOG7[14989:140499885692672]: str_stats: 0 block(s), 0 byte(s)
2014.04.12 13:40:17 LOG7[14989:140499885790976]: remote socket: FD=1 allocated (non-blocking mode)
2014.04.12 13:40:17 LOG6[14989:140499885790976]: connect_blocking: connecting 192.169.56.300:3478
2014.04.12 13:40:17 LOG7[14989:140499885790976]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds
2014.04.12 13:40:17 LOG5[14989:140499885790976]: connect_blocking: connected 192.169.56.300:3478
2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl connected remote server from 192.169.56.300:59745
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Remote FD=1 initialized
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on remote socket
2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL socket closed on SSL_read
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Sending socket write shutdown
2014.04.12 13:40:17 LOG5[14989:140499885790976]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket
2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl finished (0 left)
2014.04.12 13:40:17 LOG7[14989:140499885790976]: str_stats: 0 block(s), 0 byte(s)