[Serusers] help on mediaproxy with ser no sound

[Greger V. Teigre]

LAN-WAN deployments can sometimes by tricky. A full ngrep trace of a call 
setup (INVITE++) will be of help to understand what is happening.
g-)

peiyin wrote:
> Hi all,
>
> I'm having trouble configuring mediaproxy to work on my SER server.
> One phone is behind NAT and the other is using a public ip. Both are
> registered in SER.
>
> Calls from phone A (nat) to phone B(public) are successful whereby
> phone B will rings.However, no sound comes out from both side, also,
> when i hang up phone B, phone A doesn't produce any engaged tone.
> Calls from phone B to phone A also successful but i don't get any
> audio on either end.
>
> I'm storing all information in database.
>
> My config is as below (taken from example and modified):
>
> route{
>    if (!mf_process_maxfwd_header("10")) {
>        if (method!="ACK") {
>            sl_send_reply("483", "Too many hops");
>        };
>        break;
>    };
>
>    if (msg:len >= max_len) {
>        if (method!="ACK") {
>            sl_send_reply("513", "Message too big");
>        };
>        break;
>    };
>
>
>    if(method=="INVITE" || method=="BYE") {
>        setflag(1); #accounting
>    }
>
>    if (method=="REGISTER") {
>        if (is_from_local()) {
>            # Mark as NAT'ed
>            if (client_nat_test("3")) {
>                setflag(6);
>                force_rport();
>                fix_contact();
>            };
>
>            if (!www_authorize("my_ser_ip", "subscriber")) {
>                www_challenge("my_ser_ip", "0");
>                break;
>            } else if (!check_to()) {
>                sl_send_reply("403", "Username!=To not allowed");
>                break;
>            };
>
>            if (!save("location")) {
>                sl_reply_error();
>            };
>        } else {
>            sl_send_reply("403", "This domain is not served here");
>        };
>
>        break;
>    };
>
>    if (method=="INVITE") {
>        if (!(is_from_local() || is_uri_host_local())) {
>            sl_send_reply("403", "Relaying is forbidden");
>            break;
>        };
>        t_on_failure("1");
>    } else if (method == "BYE" || method == "CANCEL") {
>        end_media_session();
>    };
>
>    if (loose_route()) {
>        if (method=="INVITE" || method=="ACK") {
>            use_media_proxy();
>        };
>        # end media session for BYE and CANCEL is done above
>        # before entering the loose route. no need to call it here
>        t_relay();
>        break;
>    };
>
>    # Force subsequent messages to pass trough this proxy
>    if (method == "INVITE") {
>        record_route();
>    };
>
>        if (client_nat_test("3") && !search("^Record-Route:")) {
>        # Mark as NAT'ed
>        force_rport();
>        fix_contact();
>    };
>
>    if (method=="INVITE") {
>        t_on_reply("1");
>    };
>
>    if (is_uri_host_local()) {
>        if (!lookup("location")) {
>            sl_send_reply("404", "User not found");
>            break;
>        };
>    };
>
>    if (method=="INVITE" || method=="ACK") {
>        use_media_proxy();
>    };
>
>    if (!t_relay()) {
>        if (method=="INVITE" || method=="ACK") {
>            end_media_session();
>        };
>        sl_reply_error();
>    };
> }
>
> failure_route[1] {
>    end_media_session();
> }
>
> onreply_route[1] {
>    if (status=~"(183)|(2[0-9][0-9])") {
>        if (client_nat_test("1")) {
>            fix_contact();
>        };
>        use_media_proxy();
>    };
> }
>
>
>
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