Hello,

I am using stunnel v4.05 with rsync v2.6.0 and solaris9 as both my client and server machine. I am running rsync in daemon mode on the server and starting an rsync transfer on the client.

I am getting a frequent error where my rsync client process just appears to hang. On the client side I will receive several 'SSL_read returned WANT_: retrying/SSL_write returned WANT_: retrying' messages back-to-back and then finally the message is always 'Socket closed on read'.

Some data does get transferred but it appears from the messages that the socket looses its connection, and the the rsync process just hangs until time-out.

Currently in no-blocking mode with the following limits: FD_SETSIZE=1024, file ulimit=2147483647 -> 500 clients allowed

Is there any stunnel bug or system resource limit that could be the problem ??

Thanks for the help.

~Craig

stunnel.conf file example from client:

# Sample stunnel configuration file # Copyright by Michal Trojnara 2002

# Comment it out on Win32 cert = /usr/local/etc/stunnel/stunnel.pem #chroot = /usr/local/var/run/stunnel/ # PID is created inside chroot jail pid = /var/tmp/stunnel.pid #setuid = nobody #setgid = nogroup

# Some debugging stuff debug = 7 output = /var/tmp/stunnel.log foreground = yes

# Use it for client mode client = yes

# Service-level configuration

[rsync] accept = 8000 connect = some_host.com:20000

stunnel log file example from client:

2004.10.11 14:44:32 LOG7[26651:7]: rsync started 2004.10.11 14:44:32 LOG5[26651:7]: rsync connected local_host_ip:43586 2004.10.11 14:44:32 LOG7[26651:7]: FD 9 in non-blocking mode 2004.10.11 14:44:32 LOG7[26651:7]: rsync connecting remote_host_ip:20000 2004.10.11 14:44:32 LOG7[26651:7]: remote connect #1: EINPROGRESS: retrying 2004.10.11 14:44:32 LOG7[26651:7]: waitforsocket: FD=9, DIR=write 2004.10.11 14:44:32 LOG7[26651:7]: waitforsocket: ok 2004.10.11 14:44:32 LOG7[26651:7]: Remote FD=9 initialized 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): before/connect initialization 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 write client hello A 2004.10.11 14:44:32 LOG7[26651:7]: waitforsocket: FD=9, DIR=read 2004.10.11 14:44:32 LOG7[26651:7]: waitforsocket: ok 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 read server hello A 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 read finished A 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 write change cipher spec A 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 write finished A 2004.10.11 14:44:32 LOG7[26651:7]: SSL state (connect): SSLv3 flush data 2004.10.11 14:44:32 LOG7[26651:7]: 3 items in the session cache 2004.10.11 14:44:32 LOG7[26651:7]: 6 client connects (SSL_connect()) 2004.10.11 14:44:32 LOG7[26651:7]: 6 client connects that finished 2004.10.11 14:44:32 LOG7[26651:7]: 0 client renegotiatations requested 2004.10.11 14:44:32 LOG7[26651:7]: 0 server connects (SSL_accept()) 2004.10.11 14:44:32 LOG7[26651:7]: 0 server connects that finished 2004.10.11 14:44:32 LOG7[26651:7]: 0 server renegotiatiations requested 2004.10.11 14:44:32 LOG7[26651:7]: 3 session cache hits 2004.10.11 14:44:32 LOG7[26651:7]: 0 session cache misses 2004.10.11 14:44:32 LOG7[26651:7]: 0 session cache timeouts 2004.10.11 14:44:32 LOG6[26651:7]: Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc =AES(256) Mac=SHA1 2004.10.11 14:44:59 LOG7[26651:7]: SSL_write returned WANT_: retrying 2004.10.11 14:44:59 LOG7[26651:7]: SSL_read returned WANT_: retrying 2004.10.11 14:45:06 LOG7[26651:7]: SSL_write returned WANT_: retrying 2004.10.11 14:45:06 LOG7[26651:7]: SSL_read returned WANT_: retrying 2004.10.11 14:45:10 LOG7[26651:7]: SSL_write returned WANT_: retrying 2004.10.11 14:45:10 LOG7[26651:7]: SSL_read returned WANT_: retrying 2004.10.11 14:46:32 LOG7[26651:7]: SSL_write returned WANT_: retrying 2004.10.11 14:46:32 LOG7[26651:7]: SSL socket closed on SSL_read