No for UDP protocol("udp") and same IP:port should be used, why ?
Most NATs are "port restricted cone" NAT, so they won't allow traffic in
from the end point to where you haven't send data.
라스토기 wrote:
>> Considering the behavior of UAS-2, my question is: whether any SIP
>> standard suggests guidelines on whether it is advisable to send out
>> responses from a UDP port which is different from the one on which the
>> request was received? RFC 3261 - 18.2.2 Sending Responses only talks about
>> the destination the response needs to be sent to, however nothing about the
>> source.
>>
>>
>
> Response are sent with help of Via. So whatever Port is mentioned in Via,
> response will be sent to that from UAS-2. Looks like in your example Via
> contains 2000. In case of TCP/TLS, response are sent to same connection (if
> still there) from where REQUEST was received. Pls confirm..
>
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