[clug] Wireshark VOIP and Caller IP address

[rodney peters]

Keith,

I anticipate that most VoIP will use the SIP protocol.  I've never 
attempted to study the latter.

en.wikipedia.org often has a good outline of a topic, with references to 
more detail in the bibliography

Rod

On 2020-10-28 16:00, Keith Goggin via linux wrote:
> Due to increased occurrence of Unsolicited VOIP calls I've been 
> motivated to try to track the callers IP address and block them.
>
> I have a Gigaset VOIP Phone connected to a Mikrotik router connected 
> to a 4G modem/router.
>
>  Using the Mikrotik Packet Sniffer tool I can collect call data and 
> pass it to Wireshark for examination.
>
> I was expecting calls to be set up (dialed) via my VOIP provider, but 
> once established (answered) on going traffic would be directly between 
> the caller ip and the receiver ip addresses.
>
> This doesn't seem to be the case as I collected call data from a 
> friend and the UDP packets source address was that of my providers 
> server not the callers address.
>
> In principle this should be straight forward even for dummies like, me 
> alas not so.
>
> Can anyone offer a good reference text for beginners.
>
> Thanks
>
>
>