On Tue, Mar 14, 2006 at 10:16:18AM -0500, Peter Landry wrote: > >> Third, if you live in a house with a single address, you cannot > >> publicly start announcing different addresses without the postal > >> service knowing about it. If packets should arrive at your home, then > >> you better make sure you write your street and number on the > >> announcement, other things just won't work. > >> > > > >No but I use the following format: address+office1 ... address+officeN! > >That's what I try to achieve with the IPs as well but without having to > use >port numbers! > > While this analogy is probably starting to get a little stretched, > address + officeN is analogous to ip:port. IP address is like a postal > service address, it tells where a packet should physically go to. once > it gets to that address, its up to the receiving computer to figure out > which program is listening to the port the packet arrived on. When you > send a letter to address + officeN, the post office doesn't care about > the officeN part, it just looks at the address to get the packet there. > > >> Last but not least: _if_ your ADSL provider will assign and route > >> multiple addresses to your router (for example a complete C network), > >> then you can - of course - translate the different numbers into > >> different numbers in your internal network. But then: why you are not > >> using these IPs for your internal network directly? > >> > > > >well, that's not case. But even then, how can a ISP assign a complete C > >network just like this? What's behind that? > > the ISP is assigning IPs based on a block of IPs they already own, they > don't just "create" them. They'll block off part of their own class A or > B network and allow you to use them. All IPs get assigned by a naming > authority, such as ARIN.
OK. I would also like to thank all the participants for their replies.
