[stunnel-users] Stunnel and streaming audio

grimholtz at mailbolt.com grimholtz at mailbolt.com
Tue Oct 19 03:06:04 CEST 2004

I'm using stunnel 4.05 on Windows 2000 for both client and server. I
have VNC working just fine over port 443. Now I want to stream audio
from the server to the client over port 21 with stunnel and any
streaming audio server. I can't get this to work.

I'm currently using Windows Media Encoder for streaming because it is
simple and free, but I don't mind switching to SHOUTcast or something

This is the stunnel server configuration:

CAfile = CAcert.pem
CApath = certificates
cert = server.pem
client = no
verify = 3

accept = 443
connect =

accept = 21
connect =

On the client-side, I have this configuration:

CAfile = CAcert.pem
CApath = certificates
cert = client.pem
client = yes
verify = 3

accept =
connect = someurl.com:443

accept =
connect = someurl.com:21

VNC works fine but streaming audio does not. It doesn't matter if I
change port 21 to something else; I get the same error. The output on
the server-side stunnel console is:

2004.10.18 13:16:02 LOG5[2036:1732]: audiostream connected from

The output on the client-side stunnel console is:

2004.10.18 13:21:07 LOG5[1088:1300]: audiostream connected from
2004.10.18 13:21:07 LOG3[1088:1300]: SSL_connect: Peer suddenly

stunnel -version on the server-side displays this info:

stunnel 4.05 on x86-pc-mingw32-gnu WIN32 with OpenSSL 0.9.7d 17 Mar 2004
Global options
cert            = stunnel.pem
ciphers         = ALL:!ADH:+RC4:@STRENGTH
debug           = 5
key             = stunnel.pem
RNDbytes        = 64
RNDoverwrite    = yes
service         = stunnel
session         = 300 seconds
taskbar         = yes
verify          = none
Service-level options
TIMEOUTbusy     = 300 seconds
TIMEOUTclose    = 60 seconds
TIMEOUTidle     = 43200 seconds

2004.10.18 20:47:05 LOG3[1316:2092]: Server is down

openssl version on the server-side displays this info:

OpenSSL 0.9.7d 17 Mar 2004

Anyone have ideas?

Thank you in advance for any advice,
Eric Jung

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