[Serusers] SER listening on TCP

Johan Bilien jobi at via.ecp.fr
Thu Jul 10 20:32:12 CEST 2003

On Thu, Jul 10, 2003, Andrei Pelinescu-Onciul wrote:
> > I agree it would not be able to handle outgoing connections. Still,
> > this should allow TLS communication between the UA and its proxy
> > (especially REGISTER), correct me if I'm wrong.
> Yes but only for a while :-) tcp connections time out after some time. If
> they are not used, they will be closed. So the tcp connection between
> ser and stunnel will be closed and then if ser wants to send something
> back to your UA, it will try to open a new connection to it.
> You could try to increase the default timeouts (see tcpconn.h:

Oh yes I had not thought about TCP timeouts :(. At least the
registration could go through TLS.

> > > BTW: what tls-enabled sip uac do you use?
> > 
> > I just tried connecting to my stunnel with Windows Messenger, but it
> > failed with almost no reason given. I will tried to see what happens
> > with tcpdump.
> It seems Messenger does not work with openssl (I don't know if it works
> with something at all). It will go through the ssl handshake and
> immediately after that it will close the underlying tcp connection
> without any reason or error messages. It doesn't even bother to send a
>  ssl close notify.

Damn it! That's indeed what Ethereal showed me. Do you know any other
TLS-enabled SIP UA ? 

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