Hi Aleksandar,

According to Kamalio naming, top via is the first via, and bottom via header is the last via.
For each request, UAC puts its via header to the top of the list. And for each response, UAC deletes the top via header.
So the bottom via (last via) always belongs to the UE's UAC (it doesn't matter if it is Request or Response).
Why we use first Via header to identify the UE?

BR,
Erhan Sendag

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