[Serusers] SER + NAT

[Thomas Britis]

Hi all,

	I have ser running, and everything is working fine.
	I tried to use two softphones (x-lite) on the same network - behind a 
firewall (NAT).
	Both of the clients logs on ok and I can call one from other. The 
problem comes when I try to hung up from the caller. After a few 
seconds, the caller gets OK from SER BUT callee don't hang up. And SER 
don't even terminate the connection (module acc).

	I'm using nathelper and rtpproxy.

	Here is my ser.cfg (only parts that matter):

loadmodule "/tcnet/ser/lib/ser/modules/nathelper.so"

modparam("registrar", "nat_flag", 6)

# nathelper
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)

route{

         if (nat_uac_test("19")) {
                 if (method == "REGISTER" || ! search("^Record-Route:")) {
                         log (1, "src addressw different than via 
header->NAT");
                         # Try NAT traversal, if the client is symmetrical
                         fix_nated_contact();

                         if (method == "INVITE") {
                                 sl_send_reply("", "Client is behind NAT 
And Requested a call");
                                 if (fix_nated_sdp("1")) 
sl_send_reply("", "Client SDP Replaced");
                         };
                         force_rport();
                         append_hf("P-hint: fixed NAT contact for 
request\r\n");
                         # flag 5 indicates that incoming request is 
from NATed client
                         setflag(5);
                 };
         };
         if (uri==myself) {
               if (method=="REGISTER") {
                         if (isflagset(5)) {
                                 # register from nated client.
                                 setflag(6);
                         };
}

	Thank you all.
-- 
Thomas Storino Britis
TCNet Inf e Telecom LTDA