20 Dec
2004
20 Dec
'04
3:09 p.m.
I don't use mediaproxy, so I don't know the details of its function, but
generally not only INVITEs from UAs behind NAT will be proxied, but also
INVITEs to UAs behind symmetric NAT. Are you sure 5555848114(a)mydomain.com
is not behind a symmetric NAT?
g-)
Ricardo Martinez wrote:
Anyone on this one?
Thanks again
Ricardo.-
-----Mensaje original-----
De: Ricardo Martinez [mailto:rmartinez@redvoiss.net]
Enviado el: Viernes, 17 de Diciembre de 2004 17:28
Para: SER Users (E-mail)
Asunto: [Serusers] Mediaproxy question : client_nat_test ().?
Hello List
I have a question regarding the client_nat_test() in the mediaproxy
module.
If i have an INVITE something like this.
INVITE sip:5555848114@mydomain.com SIP/2.0.
Via: SIP/2.0/UDP sipgw.mydomain.com:5060;
branch=z9hG4bKNxvDQVViBAAJAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA_.
Via: SIP/2.0/TCP xx.xx.154.68:14123.
From: <sip:22408100@sipgw.mydomain.com>;tag=3655298548.
To: sip:5555848114@mydomain.com.
CSeq: 1 INVITE.
Call-ID: 3406152498(a)sipgw.mydomain.com.
Contact: <sip:22408100@sipgw.mydomain.com>.
Accept: application/sdp.
Max-Forwards: 69.
Content-Type: application/sdp.
.
v=0.
o=sipgw.mydomain.com 811562435 1354711274 IN IP4 xx.xx.154.36.
s=SIP Library call.
c=IN IP4 xx.xx.154.68.
t=3312294794 0.
m=audio 23264 RTP/AVP 18 4.
a=rtpmap:18 G729/8000.
a=rtpmap:4 g723/8000.
How is possible to mediaproxy module detect this client as a NAT'd?
Because all the calls coming from this GW are being proxied by
mediaproxy.
It suppose that this GW's has a public IP, so i don't understand why
is this happening.
Beside this can someone tell me if this is ok that a VIA parameter
has a domain name ????
The snippet for my NAT'd mediaproxy enviroment is :
if (client_nat_test("3")) {
log(1, "NAT: Requerimiento de IP privada --> fixed
contact (en rutina principal)\n");
setflag(5);
force_rport();
fix_contact();
append_hf("P-hint: fixed NAT contact for request\r\n");
....
if (method=="INVITE") {
log(1, "ROUTING: Reply processing (online user)
enabled to handle NAT'd resonses\n");
t_on_reply("1");
if ( (isflagset(5)) && (method=="INVITE" ||
method=="ACK") ) {
log(1, "NAT: Invite received -->
enabling media proxy (else del lookup 2do if)\n");
use_media_proxy();
append_hf("P-hint: request forced to
media proxy\r\n");
};
};
....
onreply_route[1] {
# If we've got here, it's because we've previously passed
through a block
# which handles NAT requests and has set a t_on_reply condition.
DB 03-08-2004
if (status =~ "(183)|(2[0-9][0-9])") {
if (client_nat_test("3") || isflagset(5)) {
log(1, "NAT: Reply from NAT'd client --> fixing contact
(onreply_route)\n");
fix_contact();
use_media_proxy();
setflag(5);
};
log(1, "NAT: NAT'd transaction answered --> enabling media
proxy (onreply_route)\n");
# use_media_proxy();
};
}
Thanks in advance.
Best reegards,
Ricardo.-
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