Re: What exactly is an internet (service) provider?

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On Sun, Jun 20, 2004 at 02:23:51PM -0700, Ole Jacobsen wrote:
> 
> We can certainly have an argument about what is a reasonable price, but if
> I can do *exactly* the same things (read/send e-mail, browse the web,
> transfer files, make connections to remote hosts via SSH, listen to BBC
> Radio 4, etc.) as I can from inside the corporate network, then what


- How would you do a Voice-over-IP phone call with someone 
  else if both of you are in such a NAT-hotel-room?

- How do you join a multicast session (actually this is not 
  a matter of NAT, but of different levels of Internet services).

- I and some friends use a UDP based protocol to exchange 
  status messages with a central server. The next version 
  will allow to send notifications if mail has arrived 
  to avoid polling continuously. How would you do that?

  (I'm sometimes using IP over GRPS with my cellphone, where
  I receive a RFC1918 address, which is NATed. When I am awaiting
  an important e-mail, I have to poll every few minutes. Polling
  over GPRS is expensive. The provider which seems to be the cheaper
  could turn out to be more expensive.)

- How would you do IP-address based authorization 
  (e.g. RMX/SPF/CallerID) if other people can have the 
  same IP address at the same time?

- IPSec through NAT (if not UDP-encapsulated)?

- What about UDP or TCP protocols which run into the 
  NAT timeout?

- What about forensics? How do you track back an attack from 
  behind a hotel's NAT router?


I don't say that all hotels have to support full internet. 
But I'd like to know what I pay for in advance and decide 
whether it is sufficient for my needs before purchasing. 

I've never seen hotel staff people who could explain what's
going on there. But if you give things a name, then they 
can simple tell you what they offer without the need to 
understand anything. They just need to learn 
"We offer XXX service for x$ and YYY for y$".

And with home internet providers you can compare whether
the one for US$n-2 is really cheaper than the one with US$n.



regards
Hadmut

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