Hi Ziv,
1) The IP address or dynamic DNS address is in the RRC's SIP contact field and not on the hardware that is attached
to the RRC. In other words, it is irrelevant to the RRC which hardware is used (e.g. K3/100, K3/0 or K3/0 mini).
2) The IP address used by the RRC in its SIP contact field needs to point to the network where the radio RRC is
located. This doesn't make any difference whether it is a dynamic DNS address or the "real" external IP address.
This also means that if you have more than one device connected to the outside, e.g. RRC, Webswitch, serial
server,etc., then you only need to activate one, single dynamic DNS address and can leave all other devices
not enabled. The various devices are reached by using the "real" external IP number or the dynamic DNS address
alias and uses port numbers (via router port forwarding) to reach the intended device within the network.
73,
Mitch DJ0QN / K7DX