Anjan, The reason behind this is to keep 5060 available for incoming traffic and assign a dynamic/ephemeral port for outgoing traffic.
George On Tue, Jan 22, 2019 at 4:58 PM Anjan Naik <anjankumarn...@gmail.com> wrote: > Thanks George. > > But my concern is what is the benifit if server use Ephemeral port instead > of 5060 for outgoing port ? > Could you please explain bit more on this ? > > Thanks, > Anjan > > On Tue, Jan 22, 2019 at 8:19 PM George Vagenas <gvage...@gmail.com> wrote: > >> Anjan, >> >> The use of the ephimeral port is not SIP specific but because of the >> TCP/IP stack. >> And even though the outgoing messages will be sent over an ephemeral >> port, the message is prepared using the standard ports the SIP stack is >> listening so subsequent requests and responses are able to reach back. >> >> Regards >> George >> >> On Tue, Jan 22, 2019 at 4:25 PM Anjan Naik <anjankumarn...@gmail.com> >> wrote: >> >>> HI, >>> >>> By default SIP uses port 5060 for incoming and outgoing messages. But In >>> some cases, I have seen, the incoming port used by server is 5060 but >>> when >>> it sends outgoing packet, it uses Ephimeral port. >>> >>> Could someone please explain me , why this Ephimeral ports being used ? >>> and >>> what is it benifits.? >>> >>> Thanks, >>> Anjan >>> _______________________________________________ >>> Sip-implementors mailing list >>> Sip-implementors@lists.cs.columbia.edu >>> https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors >>> >> >> >> -- >> George Vagenas >> > -- George Vagenas _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
