nanog mailing list archives

Re: Large ISPs doing NAT?


From: "Marshall Eubanks" <tme () multicasttech com>
Date: Mon, 29 Apr 2002 11:53:52 -0400


On Mon, 29 Apr 2002 08:43:11 -0700
 Beckmeyer <beck () pacbell net> wrote:

Is anybody here doing NAT for their customers?

I'm looking at a situation where I may have to provide
NAPT for tens of 
thousands of users and am curious as to what hardware is
being used, how 
well it scales, what kind of loads it takes such as:

throughput,
max simultaneous sessions experienced,
session establishment rates,
avg # of sessions per user,
ALGs you've found necessary,
number of sessions supported per public realm IP in
reality.  

I've done a survey of firewall, switch, and router
companies so I have 
their reported numbers and I've done a bit of testing in
my lab and have 
found that reported numbers do not necessarily translate
into what the 
box will experience in something resembling a production
network.  This 
is why I'm asking this group - reality can bite!

A second area of concern I have is how to enforce AUPs
when your users 
"appearance" can be *very* transitive making tracking
back the offender 
nearly impossible.

Any small piece of help, advice, or pointer would be most
appreciated.

Thanks most much.


Is the whole problem just a lack of address space, or
is there something more you are trying to do ?

Regards
Marshall Eubanks

John Beckmeyer
beck () pacbell net



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