in the P Series, I am able to specify a Linkus SIP port like 6023 for external usage. I would then use the NAT redirect feature of the router to redirect 6023 to the internal port 5060. That stops fake phone calls, or aggressive registrations.
But in the S series I do not see the option to use an external port different then 5060 for linkus. Do I oversaw the option or is it really not present? Also, since this is rather a thing the client has to know about then the server, maybe it is possible to specify the sip port to use manually in the Linkus Client if if cannot be done by the automatic provisioning?