[Serusers] How to mangle SDP with result of shellscript

[Klaus Darilion]

Alexander Philipp Lintenhofer wrote:
> Hi there,
> But there is a problem if one client uses STUN to detect the outbound IP 
> of the NAT-Box and changes the IP-Address of his SDP body to the 
> outbound IP-address of the NAT-Box. The original local IP-Address ist 
> lost. This value must be recovered by SER - otherwise the RTP-stream of 
> this local connection is relayed over the public internet. I managed 

By using STUN and the public IP address, the call does not goes into the 
public internet - only to the NAT-box and back into the LAN. btw: this 
works only if the NAT box supports "hairpin of media". If not, you also 
have to use an RTP proxy.

regards,
klaus