thanks for the pointer.
 
Are there known issues for TCP+TLS to work across NAT? The few NAT travesal sloutions I am aware of such as STUN, nathelper+rtp proxy seem to work with UDP only. 
 
- ming 

Klaus Darilion <klaus.mailinglists@pernau.at> wrote:
Yi Zheng wrote:
> Hi,
>
> I am wondering whether SER has any support for TLS as a security
> mechanism? Thanks,

Yes. It is in the experimental tree:
http://cvs.berlios.de/cgi-bin/viewcvs.cgi/ser/experimental/tls/

You can also try openser, which has TLS integrated in the stable version
1.0.0

regards
klaus