Wireshark-users: Re: [Wireshark-users] Cannot see RTP packets on end
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From: capricorn 80 <cool_capricorn80@xxxxxxxxxxx>
Date: Mon, 5 Apr 2010 21:43:27 +0000
 
Hi !
 
Thanks for the information. I read this before that RTP run on top of UDP and I can use the decode option. But the problem is that what If i am not sure about that which UDP packet is RTP.
 
I have the .pcap file with me right now. 
 
Why my wireshark can recognise the RTP out of same traffic and not his. Can I do some settings on his end other than decode as ?
 
Regards,
 

 
Date: Tue, 6 Apr 2010 07:16:28 +1000
From: martinvisser99@xxxxxxxxx
To: wireshark-users@xxxxxxxxxxxxx
Subject: Re: [Wireshark-users] Cannot see RTP packets on end

The problem will be that your friends capture probably has not seen the the related SIP or RTSP control packets associated with the conversation. RTP runs on top of UDP, but is doesn't use a fixed or well known port, so it is difficult for Wireshark to always determine whether particular UDP packets are UDP. If you right-click on a UDP packet that you think is RTP and use "Decode As..." to select RTP, you should get the result you are after. 

Regards, Martin

MartinVisser99@xxxxxxxxx


On Tue, Apr 6, 2010 at 6:41 AM, capricorn 80 <cool_capricorn80@xxxxxxxxxxx> wrote:
 
 Hi!
 
  I am running a test using wireshark running on two laptops located on different location of the world.
 
  The wireshark running on my laptop can capture the RTP traffic but wireshark running on my friends laptop cannot capture the RTP traffic and only UDP.
 
  This is quite strange. Why wireshark dont capture the RTP packets on my friends laptop?
 
 
 My laptop (sweden)--------------- Asterisk Server (sweden) -------------------- My friend laptop (United Kingdom)
 
 
Regards,
 
 

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