Hello all,

     I've got a working conf on which RTPs work perfectly with TCP, but fails to work with UDP... can anyont tell me why??

Here's my conf:

#
# sample config file to be used with nathelper/rtpproxy
#
# start RTPProxy with: rtpproxy -l your_public_ip -s udp:localhost:8899
#

# ----------- global configuration parameters ------------------------

debug=3            # debug level (cmd line: -dddddddddd)
fork=yes
log_stderror=yes    # (cmd line: -E)

/* Uncomment these lines to enter debugging mode
fork=no
log_stderror=yes
*/

check_via=no    # (cmd. line: -v)
dns=no          # (cmd. line: -r)
rev_dns=no      # (cmd. line: -R)
port=5060
children=10
#fifo="/tmp/openser_fifo"

# --- module loading

mpath="/lib/openser/modules/"

loadmodule "mysql.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule " textops.so"
#loadmodule "dispatcher.so"
loadmodule "nathelper.so"
loadmodule "auth.so"
loadmodule "auth_db.so"
loadmodule "xlog.so"
#loadmodule "/usr/lib/openser/modules/acc.so"

#modparam("acc", "early_media", 0)
#modparam("acc", "report_cancels", 1)

#modparam("acc", "db_flag", 2)
#modparam("acc", "db_url", " mysql://user:pwd@localhost/openser")
#modparam("acc", "report_ack", 0)
#modparam("acc", "db_missed_flag", 3)
#modparam("acc", "failed_transaction_flag", 4)
#modparam("acc", "db_extra", "from_uri=$fu ; to_uri=$tu ; from_user=$fU; source_ip=$si")

# --- setting module parameters

modparam("usrloc|auth_db","db_url"," mysql://user:pwd@localhost/openser")

# --- setting module parameters
#modparam("dispatcher", "list_file", "/etc/openser/dispatcher.list")

# -- usrloc params --
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "nat_bflag", 3)

# -- registrar params --
#modparam("registrar", "received_avp", "$avp(s:rcv)")

# -- auth params --
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")

# -- rr params --
modparam("rr", "enable_full_lr", 1)

# -- nathelper
modparam("registrar|nathelper", "received_avp", "$avp(i:42)")
modparam("nathelper", "rtpproxy_sock", "unix:/var/run/rtpproxy.sock")
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", 7)
modparam("nathelper", "sipping_from", "sip:pinger@whatever.com")
#modparam("nathelper", "received_avp", "$avp(s:rcv)")

# -- xlog
modparam("xlog", "buf_size", 8192)

modparam("registrar", "max_contacts", 5)

# --- main routing logic
route{

        if (!mf_process_maxfwd_header("10")) {
                sl_send_reply("483","Too Many Hops");
                exit;
        };

        # NAT detection
        route(2);

        if (!method=="REGISTER")
                record_route();

        if (loose_route()) {
                append_hf("P-hint: rr-enforced\r\n");
                route(1);
        };

        if (!uri==myself) {
                append_hf("P-hint: outbound\r\n");
                route(1);
        };

        if (uri==myself) {
                if (method=="REGISTER") {
                       if (!www_authorize("OPENSER_IP", "subscriber")) {
                               www_challenge("OPENSER_IP", "0");
                               exit;
                       };

                        if (isflagset(5)) {
                                setbflag(6);
                                # if you want OPTIONS natpings uncomment next
                                # setflag(7);
                        };
                        save("location");
                        exit;
                };

               #
               # - TERMINATIONS
               #
               if (method=="INVITE") {
                    if (!proxy_authorize("OPENSER_IP","subscriber"))
                    {
                         if($si=="GW_IP"){
                              xlog("L_NOTICE", "\n************** ALLOWING INCOMING CALL AS IT COMES FROM $si ************\n");
                         }else{
                              proxy_challenge("OPENSER_IP","0");
                              exit;
                         }
                    }

                    if (uri=~"^sip:00"){
                         xlog("L_NOTICE", "\n************** GOT OUTSIDE CALL ************\n");
                         strip(2);
                         prefix("M3ll4m0d4v1d");

                         rewritehostport("GW_IP:5060");
                         sl_send_reply("100","Trying");
                         forward();
                         exit();
                    }

               }

                if (!lookup("location")) {
                        sl_send_reply("404", "Not Found");
                        exit;
                };
                append_hf("P-hint: usrloc applied\r\n");
        };

        route(1);
}

route[1] {
        if (subst_uri('/(sip:.*);nat=yes/\1/')){
                setbflag(6);
        };

        if (isflagset(5)||isbflagset(6)) {
                route(3);
        }

        if (!t_relay()) {
                sl_reply_error();
        };
        exit;
}

route[2]{
        force_rport();
        if (nat_uac_test("19")) {
                if (method=="REGISTER") {
                        fix_nated_register();
                } else {
                        fix_nated_contact();
                };
                setflag(5);
        };
}

route[3] {
        if (is_method("BYE|CANCEL")) {
                unforce_rtp_proxy();
        } else if (is_method("INVITE")){
                force_rtp_proxy();
                t_on_failure("1");
        };
        if (isflagset(5))
                search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');
        t_on_reply("1");
}

failure_route[1] {
        if (isbflagset(6) || isflagset(5)) {
                unforce_rtp_proxy();
        }
}

onreply_route[1] {
        if ((isflagset(5) || isbflagset(6)) && status=~"(183)|(2[0-9][0-9])") {
                force_rtp_proxy();
        }
        search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');

        if (isbflagset(6)) {
                fix_nated_contact();
        }
        exit;
}

MANY thanks to all.

David