Re: IP network address assignments/allocations information?

[Steve Hultquist]

Many of the people who have deployed NATs are responding directly to the
address scarcity (and resultant cost). If you consider that many ISPs now
have different pricing models for multiple IP addresses than they do for a
single (regardless of bandwidth used), it isn't surprising. I also think
that it's interesting to consider that security concerns are the other
primary reason for use of NAT.

ssh



                                                                                       
                        
                    Keith Moore                                                        
                        
                    <[EMAIL PROTECTED]        To:     "Fleischman, Eric W" 
<[EMAIL PROTECTED]>         
                    .edu>                cc:     Randy Bush <[EMAIL PROTECTED]>, "'Brian E 
Carpenter'"             
                                         <[EMAIL PROTECTED]>, Bill Manning 
<[EMAIL PROTECTED]>, Pete Loshin 
                    11/29/1999           <[EMAIL PROTECTED]>, [EMAIL PROTECTED]              
                        
                    11:08 AM             Subject:     Re: IP network address 
assignments/allocations           
                                         information?                                  
                        
                                                                                       
                        



> 1) If we effectively ran out of addresses when RFC 1597 was published,
> has running out of addresses hurt us in any way?

absolutely.  partially as a result of (perceived or actual) address
scarcity,
people have deployed NATs everywhere, and this has had an large adverse
effect on the Internet's ability to support certain types of applications -
particularly distributed applications (multi-party conferencing, games,
simulations, distributed computations) and applications where the "user"
end needs to be able to accept incoming traffic which is initiated
from "outside".  NATs also impair the reliability of the network because
they can discard address mappings for connections that are still being
used by applications.

Keith