![]() ![]() ![]() More important is where to locate the probe in order to gather the appropriate frames containing voice related protocols. Analysis could be done either in real time when Wireshark is running on the probe itself, or it is also possible to capture the frames, store these in a file, and perform the analysis afterwards. Prior to analyzing the network frames traversing the network, it is required to capture them. This article focuses on SIP and RTP protocols which represent most of today's Voice over IP implementations. Even if you will find on some commercial products very powerful features, Wireshark has some good plug-ins targeting the VoIP space (as well as many others). It is simple, efficient, and runs either on Microsoft Windows or Linux. Wireshark (formerly Ethereal) is THE tool to have in your toolbox whenever working with applications that use the network. This article presents some interesting Wireshark features related to Voice over IP protocols. When working in the IP telephony world it is crucial to know how to use a network analyzer, in order to understand how the traffic is propagating over the network. The original site is no longer available. ![]() Beware that these techniques dealing with RTP streams do not apply if those streams are encrypted. Some tips to use Wireshark to find problems in SIP signaling and RTP media streams. ![]()
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