Public IP-Addresses / DynDNS

In most frequent cases EIBPORT will be situated in a local (private) network and it will be connected with internet by a router. In such public network like internet, it is necessary, that every user holds his own address und this address must be unique. This address will be assigned to router by internet service provider (ISP)

Static IP-Address

To get one static internet address, you must sign a contract with the provider. Corresponding router and thereby the network behind it, will always be reachable by that same address.

Dynamic IP-Address

This kind of address is mostly current in private surroundings (DSL flat rate etc.) Opposite to statical IP-address, router will get from ISP one random address out of his address space. This address indeed will be unique, but it will be often altered relatively. Every time, if router will connect to internet again, it will get another address. This happens at last after 24 h. If you take the same way for connecting EIBPORT, so it will not be reachable after 24 h at last, because address will not be correct further.

In internet you will find services for free (for example http://dyndns.org ), which will connect dynamic IP-addresses with a so-called domain name. That have the advantage that user doesn´t has to memorize no unhandy combinations of numbers, but to notice only one name like “athome.dyndns.org”  By the help of this unique address, EIBPORT is always be reachable, although real address behind will change constantly. For this service a router will be necessary, which supports dynamic DNS addresses.