---- Original Message ----
From: Alberto
To: Alberto ; serusers@lists.iptel.org
Sent: Thursday, September 22, 2005 01:09 PM
Subject: Re: [Serusers] One path of RTP traffic (possible bug?????)

> I have examine the packet INVITE and have seen the next:
>
> AA.AA.AA.AA = public IP address of SER/Mediaproxy Server.
> BB.BB.BB.BB = public IP address of endpoint (the endopoint is behind
> nat)
> CC.CC.CC.CC = public IP address of SIP SERVER(carrier)
>
> When the SER follows the INVITE message, rewrites the field Contact
> and
> fill it with the public ip address of sip client. Can this to be my
> problem?
>
> In this same message into SDP, in Contact information, the SER change
> this field BUT write the
> ip address two times. Can this a bug?
>
> Thank at all,
> --
> Alberto
>
> ----------------
> INVITE from endpoint to SER:
>   Session Initiation Protocol
>     Request-Line: INVITE sip:932215863@AA.AA.AA.AA SIP/2.0
>         Method: INVITE
>         Resent Packet: False
>     Message Header
>         Via: SIP/2.0/UDP
> 192.168.100.55:5060;branch=z9hG4bK-63bf38d4;rport
>         From: <sip:1000@AA.AA.AA.AA>;tag=c1342f3464087414o0
>         To: <sip:932215863@AA.AA.AA.AA>
>         Call-ID: d7eca5b4-6a866f94@192.168.100.55
>         CSeq: 102 INVITE
>         Max-Forwards: 70
>         Contact: <sip:1000@192.168.100.55:5060>
>         Expires: 240
>         User-Agent: Linksys/PAP2-2.0.12(LS)
>         Content-Length: 428
>         Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
>         Supported: x-sipura
>         Content-Type: application/sdp
>     Message body
>         Session Description Protocol
>             Session Description Protocol Version (v): 0
>             Owner/Creator, Session Id (o): - 6735673 6735673 IN IP4
> 192.168.100.55
>                 Owner Username: -
>                 Session ID: 6735673
>                 Session Version: 6735673
>                 Owner Network Type: IN
>                 Owner Address Type: IP4
>                 Owner Address: 192.168.100.55
>             Session Name (s): -
>             Connection Information (c): IN IP4 192.168.100.55
>                 Connection Network Type: IN
>                 Connection Address Type: IP4
>                 Connection Address: 192.168.100.55
>                    ........................
>
> INVITE from SER to SIP SERVER(CARRIER):
> Session Initiation Protocol
>     Request-Line: INVITE sip:932215863@CC.CC.CC.CC:5060 SIP/2.0
>         Method: INVITE
>         Resent Packet: False
>     Message Header
>         Record-Route:
> <sip:932215863@AA.AA.AA.AA:5060;nat=yes;ftag=c1342f3464087414o0;lr=on>
>         Via: SIP/2.0/UDP AA.AA.AA.AA;branch=z9hG4bKa01c.50c2aac6.0
>         Via: SIP/2.0/UDP
> 192.168.100.55:5060;received=BB.BB.BB.BB;branch=z9hG4bK-63bf38d4;rport=60413
>         From: <sip:1000@AA.AA.AA.AA>;tag=c1342f3464087414o0
>         To: <sip:932215863@AA.AA.AA.AA>
>         Call-ID: d7eca5b4-6a866f94@192.168.100.55
>         CSeq: 102 INVITE
>         Max-Forwards: 16
>         Contact: <sip:1000@BB.BB.BB.BB:60413>
>         Expires: 240
>         User-Agent: Linksys/PAP2-2.0.12(LS)
>         Content-Length: 445
>         Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
>         Supported: x-sipura
>         Content-Type: application/sdp
>     Message body
>         Session Description Protocol
>             Session Description Protocol Version (v): 0
>             Owner/Creator, Session Id (o): - 6735673 6735673 IN IP4
> 192.168.100.55
>                 Owner Username: -
>                 Session ID: 6735673
>                 Session Version: 6735673
>                 Owner Network Type: IN
>                 Owner Address Type: IP4
>                 Owner Address: 192.168.100.55
>             Session Name (s): -
>             Connection Information (c): IN IP4 AA.AA.AA.AAAA.AA.AA.AA
>                 Connection Network Type: IN
>                 Connection Address Type: IP4
>                 Connection Address: AA.AA.AA.AAAA.AA.AA.AA
> <---------- BUG????????
>
>
> ----- Original Message -----
> From: Alberto
> To: serusers@lists.iptel.org
> Sent: Thursday, September 22, 2005 10:55 AM
> Subject: [Serusers] One path of RTP traffic
>
>
> Hi,
> I have a SER + Mediaproxy. I have not any problem the call between
> SIP clients (behind or not the NATs)
> but when I try to call to PSTN (via cisco) I only have RTP traffic
> from SIP client to PSTN.
>
> Summarizing, the path of rtp traffic would have to be from:
>
>         up:    SIP Client ----> SER ---> GW-PSTN
>         down: SIP Client <---- SER <--- GW-PSTN
>
> but, really is:
>
>         up:    SIP Client ----> SER ---> GW-PSTN
>         down: SIP Client <------------- GW-PSTN
>
> I use the command:
>
>      rewritehostport("212.xxx.xxx.xxx:5060");
>
> when I match a geographic number.
>
> The complete scheme is:
>
>     SIP Client ---- NAT --------- SER+Mediaproxy -------- SIP Server
> --- GWPSTN
>
>
>
> Some idea?
>
> Thanks,