Re: [Users] one way audio problem with stun

Mon, 26 Sep 2005 02:30:18 -0700 

Hello,
the problem is the natbox, being a linux it implements symmetric NAT which allocates a new port for media, other than STUN returned. 


To solve the problem you have to use nathelper/rtpproxy or mediaproxy on 
the SIP server.


Cheers,
Daniel


On 09/24/05 00:23, Diego Valencia wrote:


Hi everybody,  I have a "one way audio" problem. My enviroment is:

 
xx.xx.63.75/27 = SER

xx.xx.63.68/27 = Natbox (linux iptables masquerade)
xx.xx.70.2/25 = STUN server
xx.xx.63.78/27 = PAP1 linksys AOR 2000
10.1.1.233/24 = PAP2 linksys AOR 2001 (behind NATbox with stun enable)

 
I have no audio from PAP1 to PAP2 when the call is made from PAP1 to 
PAP2, but when the call is made from PAP2 to PAP1 it works correctly.
 
I see on the natbox that the RTP packet is droped with unreachable 
cause (icmp messages).
 
This is the trace (ngrep) for the call from PAP1 to PAP2 on external 
interface of the natbox, where I can see STUN packets and the number 
udp port that the PAP willl be use (16444 to 16447).
The problem is natbox use other port (1173). I don't know if this 
problem is on natbox or stun server or PAP.

Can you helpme?

 
 
Thanks!!
 


U xx.xx.63.75:5060 -> xx.xx.63.68:5060

  INVITE sip:[EMAIL PROTECTED]:5060 SIP/2.0..Record-Route: 
<sip:xx.xx.63.75;ftag=d1ccd3db9e31eb1fo0;lr=on>..Via: SIP/2.0/UDP
  xx.xx.63.75;branch=z9hG4bK52fb.41985863.0..Via: SIP/2.0/UDP 
xx.xx.63.78:5060;branch=z9hG4bK-57b1577f..From: 2000 <sip:5
  [EMAIL PROTECTED]>;tag=d1ccd3db9e31eb1fo0..To 
<mailto:[EMAIL PROTECTED];tag=d1ccd3db9e31eb1fo0..To>: 
<sip:[EMAIL PROTECTED]>..Call-ID: [EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>: 101
   INVITE..Max-Forwards: 16..Contact: 2000 
<sip:[EMAIL PROTECTED]:5060>..Expires: 240..User-Agent: 
Linksys/PAP2-2.0.10(L
  Sc)..Content-Length: 420..Allow: ACK, BYE, CANCEL, INFO, INVITE, 
NOTIFY, OPTIONS, REFER..Supported: x-sipura..Content-Type: app
  lication/sdp....v=0..o=- 29375 29375 IN IP4 xx.xx.63.78..s=-..c=IN 
IP4 xx.xx.63.78..t=0 0..m=audio 16472 RTP/AVP 18 0 2 4 8 9
  6 97 98 100 101..a=rtpmap:18 G729a/8000..a=rtpmap:0 
PCMU/8000..a=rtpmap:2 G726-32/8000..a=rtpmap:4 G723/8000..a=rtpmap:8 
PCMA/8
  000..a=rtpmap:96 G726-40/8000..a=rtpmap:97 G726-24/8000..a=rtpmap:98 
G726-16/8000..a=rtpmap:100 NSE/8000..a=rtpmap:101 telephon
  e-event/8000..a=fmtp:101 
0-15..a=ptime:30..a=sendrecv..                                                                        


#
U xx.xx.63.68:5060 -> xx.xx.63.75:5060

  SIP/2.0 100 Trying..To: <sip:[EMAIL PROTECTED]>..From: 2000 
<sip:[EMAIL PROTECTED]>;tag=d1ccd3db9e31eb1fo0..Call-ID
  : [EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>: 101 INVITE..Via: 
SIP/2.0/UDP xx.xx.63.75;branch=z9hG4bK52fb.41985863.0..Via: SIP/2.0/U
  DP xx.xx.63.78:5060;branch=z9hG4bK-57b1577f..Record-Route: 
<sip:xx.xx.63.75;ftag=d1ccd3db9e31eb1fo0;lr=on>..Server: Linksys/P
  AP2-2.0.10(LSc)..Content-Length: 
0....                                                                                         


#
U xx.xx.63.68:5060 -> xx.xx.70.2:3478

  
.....*f..*f..*f..*f.                                                                                                           


#
U xx.xx.63.68:16444 -> xx.xx.70.2:3478

  
.....OB..OB..OB..OB.                                                                                                           


#
U xx.xx.63.68:16445 -> xx.xx.70.2:3478

  
....................                                                                                                           


#
U xx.xx.63.68:16446 -> xx.xx.70.2:3478

  
.......&...&...&...&                                                                                                           


#
U xx.xx.63.68:16447 -> xx.xx.70.2:3478

  
....#...#...#...#...                                                                                                           


#
U xx.xx.70.2:3478 -> xx.xx.63.68:16447

  [EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>.                                                                       


#
U xx.xx.63.68:5060 -> xx.xx.70.2:3478

  
.....*f..*f..*f..*f.                                                                                                           


#
U xx.xx.63.68:16444 -> xx.xx.70.2:3478

  
.....OB..OB..OB..OB.                                                                                                           


#
U xx.xx.70.2:3478 -> xx.xx.63.68:5060

  
...$.*f..*f..*f..*f..........+?D.........+F..........+F.                                                                       


#
U xx.xx.63.68:16445 -> xx.xx.70.2:3478

  
....................                                                                                                           


#
U xx.xx.63.68:16446 -> xx.xx.70.2:3478

  
.......&...&...&...&                                                                                                           


#
U xx.xx.70.2:3478 -> xx.xx.63.68:16444

  ...$.OB..OB..OB..OB.......@<.+?D.........+F..........+F 
<mailto:[EMAIL PROTECTED]>.                                                                       


#
U xx.xx.70.2:3478 -> xx.xx.63.68:16446

  ...$...&...&...&...&......@>.+?D.........+F..........+F 
<mailto:...$...&...&...&...&[EMAIL PROTECTED]>.                                                                       


#
U xx.xx.63.68:5060 -> xx.xx.63.75:5060

  SIP/2.0 180 Ringing..To: 
<sip:[EMAIL PROTECTED]>;tag=156298945b7d27i0..From: 2000 
<sip:[EMAIL PROTECTED]>;tag=d1ccd
  3db9e31eb1fo0..Call-ID: [EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>: 101 INVITE..Via: 
SIP/2.0/UDP xx.xx.63.75;branch=z9hG4bK52fb.4198
  5863.0..Via: SIP/2.0/UDP 
xx.xx.63.78:5060;branch=z9hG4bK-57b1577f..Record-Route: 
<sip:xx.xx.63.75;ftag=d1ccd3db9e31eb1fo0;lr=
  on>..Server: Linksys/PAP2-2.0.10(LSc)..Content-Length: 
0....                                                                  
#

U xx.xx.70.2:3478 -> xx.xx.63.68:16444

  ...$.OB..OB..OB..OB.......@<.+?D.........+F..........+F 
<mailto:[EMAIL PROTECTED]>.                                                                       


#
U xx.xx.63.68:5060 -> xx.xx.63.75:5060

  SIP/2.0 200 OK..To: 
<sip:[EMAIL PROTECTED]>;tag=156298945b7d27i0..From: 2000 
<sip:[EMAIL PROTECTED]>;tag=d1ccd3db9e
  31eb1fo0..Call-ID: [EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>: 101 INVITE..Via: 
SIP/2.0/UDP xx.xx.63.75;branch=z9hG4bK52fb.41985863.
  0..Via: SIP/2.0/UDP 
xx.xx.63.78:5060;branch=z9hG4bK-57b1577f..Record-Route: 
<sip:xx.xx.63.75;ftag=d1ccd3db9e31eb1fo0;lr=on>..
  Contact: 2001 <sip:[EMAIL PROTECTED]:5060>..Server: 
Linksys/PAP2-2.0.10(LSc)..Content-Length: 236..Allow: ACK, BYE, CANCE
  L, INFO, INVITE, NOTIFY, OPTIONS, REFER..Supported: 
x-sipura..Content-Type: application/sdp....v=0..o=- 659101 659101 IN 
IP4 20
  0.43.63.68..s=-..c=IN IP4 xx.xx.63.68..t=0 0..m=audio 16444 RTP/AVP 
18 100 101..a=rtpmap:18 G729a/8000..a=rtpmap:100 NSE/8000.
  .a=rtpmap:101 telephone-event/8000..a=fmtp:101 
0-15..a=ptime:30..a=sendrecv..                                                  


#
U xx.xx.63.75:5060 -> xx.xx.63.68:5060

  ACK sip:[EMAIL PROTECTED]:5060 SIP/2.0..Record-Route: 
<sip:xx.xx.63.75;ftag=d1ccd3db9e31eb1fo0;lr=on>..Via: SIP/2.0/UDP 200
  .43.63.75;branch=0..Via: SIP/2.0/UDP 
xx.xx.63.78:5060;branch=z9hG4bK-5a4c9c84..From: 2000 
<sip:[EMAIL PROTECTED]>;tag
  =d1ccd3db9e31eb1fo0..To: 
<sip:[EMAIL PROTECTED]>;tag=156298945b7d27i0..Call-ID: 
[EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>: 101 AC
  K..Max-Forwards: 16..Contact: 2000 
<sip:[EMAIL PROTECTED]:5060>..User-Agent: 
Linksys/PAP2-2.0.10(LSc)..Content-Length:
   
0....                                                                                                                         


#
U xx.xx.63.78:16472 -> xx.xx.63.68:16444

  [EMAIL PROTECTED]|B..n..a.k(.R 
<mailto:[EMAIL PROTECTED]>                                                                                     


#
I xx.xx.63.68 -> xx.xx.63.78 3:3

  
[EMAIL PROTECTED]@<[EMAIL PROTECTED]|B..n..a.k(.R 
<mailto:[EMAIL PROTECTED]@[EMAIL PROTECTED]>                                                     


#
U xx.xx.63.68:1173 -> xx.xx.63.78:16472

  
..!o..vy.F.!...|...&.T.BP..Z..n...:.3..d..                                                                                     


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U xx.xx.63.78:16472 -> xx.xx.63.68:16444

  ..8......L... 
.s..._exR..Kc.....+.O<.RZ.O{                                                                                     


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I xx.xx.63.68 -> xx.xx.63.78 3:3

  [EMAIL PROTECTED]@<.2....8......L 
<mailto:[EMAIL PROTECTED]@%3C.2....8......L>... 
.s..._exR..Kc.....+.O<.RZ.O{                                                     


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U xx.xx.63.68:1173 -> xx.xx.63.78:16472

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<mailto:[EMAIL PROTECTED]>,                                                                                     


#
U xx.xx.63.78:16472 -> xx.xx.63.68:16444

  ..8.../[EMAIL PROTECTED],[.P...rU.A..P 
<mailto:..8.../[EMAIL PROTECTED],%5B.P...rU.A..P>...                                                                                     


#
I xx.xx.63.68 -> xx.xx.63.78 3:3

  
[EMAIL PROTECTED]@<.2....8.../[EMAIL PROTECTED],[.P...rU.A..P 
<mailto:[EMAIL PROTECTED]@%3C.2....8.../[EMAIL PROTECTED],%5B.P...rU.A..P>...                                                     


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..!q..xY.F.!....Mf.....Fu.Q.....~.}....v..                                                                                     


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..8...0..L..\.~..h..+..|S.C.M..~6W}....6sR                                                                                     


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I xx.xx.63.68 -> xx.xx.63.78 3:3

  
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<mailto:[EMAIL PROTECTED]@%3C.2....8...0..L..%5C.%7E..h..+..%7CS.C.M..%7E6W%7D....6sR>                                                     


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U xx.xx.63.68:1173 -> xx.xx.63.78:16472

  
..!r..yI.F.!x|..Eo..._.1...;..GRz....*.x.Z                                                                                     


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..8...1..L..x.....n."..6.v....S.D.......S.                                                                                     


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I xx.xx.63.68 -> xx.xx.63.78 3:3

  
[EMAIL PROTECTED]@<.2.!..8...1..L..x.....n."..6.v....S.D.......S 
<mailto:[EMAIL PROTECTED]@%3C.2.%21..8...1..L..x.....n.%22..6.v....S.D.......S>.                                                     


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U xx.xx.63.68:1173 -> xx.xx.63.78:16472

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.5...E....v......                                                                                     


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..8...2..L..z....+.b..r?...r....|..$.x...^                                                                                     


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I xx.xx.63.68 -> xx.xx.63.78 3:3

  
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<mailto:[EMAIL PROTECTED]@%3C.2....8...2..L..z....+.b..r?...r....%7C..$.x>...^                                                     


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U xx.xx.63.68:1173 -> xx.xx.63.78:16472

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V..by.                                                                                     


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