Hello!

I would like to make a SIP proxy, with dual function. The first function will be a normal SIP proxy, while in the sec. function it will be working as an RTP proxy. For example: A user sends a registration reguest to my SIP. The proxy sees, that the domain name is mytest.ser, and the proxy will know, that this domain will be managed by itself. If the user creates a new registration -but in this case with mytest.hu- then the SER will do a NAT, and forwarding the message away, via the external interface (to another proxy).

The arch: Client <-> DefaultGW (+SIP and RTP proxy) <-> Another SIP 10.1.1.1 <-> 10.1.1.254 __NAT___10.200.200.254 <-> 10.200.200.1

The default config -with a little modification- is working fine, but it does not rewrite the contact header in the SDP file . (I installed the rtpproxy, and I have set up iptables too.)

alias=mytest.ser loadmodule "/usr/lib/ser/modules/nathelper.so"

route{

#inserted by klaus if (method=="INVITE") { record_route(); force_rtp_proxy(); forward(10.200.200.1,5060); /* set up reply processing */ t_on_reply("1"); }; forward(10.200.200.1,5060);

}

#inserted by klaus # all incoming replies for t_onrepli-ed transactions enter here onreply_route[1] { if (status=~"[12][0-9][0-9]") force_rtp_proxy(); }

A number of persons will be use it with M$ Messenger, so I'm interested in such a solution, where we do not need to set an outbound proxy in the client. Can somebody send me any example?

Thanks, Jani

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