Re: "download" caps

["Alex Lambert" <alambert () webmaster com>]

> Telcos in .au are starting to introduce plans (optus@home cable, iinet
> adsl etc) whereby you get a monthly cap that's soft; at the time the cap
> is reached, the rate is limited (either severely or lightly, depending
> on the quality of the plan) and no excess data charges are inflicted
> upon the user.

The University of Illinois at Urbana-Champaign is doing something very
similar.

http://www.housing.uiuc.edu/technology/urhnetsecurity/rate_limit.htm

"Unrestricted Class (10Mb/s): By default, connections are in this class. The
connection is not artificially throttled or limited.
Restricted Class A (128kb/s per flow): When the Internet traffic of an IP
address reaches 80% of the limit (600MB), the IP address (computer) will be
rate-limited (throttled) to 128kb/s per flow.
Restricted Class B (32kb/s per flow): When the Internet traffic of an IP
address reaches 100% of the limit (750MB), the IP address (computer) will be
rate-limited (throttled) to 32kb/s per flow.
Restricted Class C (512kb/s aggregate): When the Internet traffic of an IP
address reaches 150% of the limit (1125MB), the IP address (computer) will
be rate-limited (throttled) to approximately the speed of a 33.6 modem
(about .32% of the bandwidth in the unrestricted class)."

"Q: Will I ever get shut down for traffic?
A: The current "rate-limiting" system does not turn off ports it just slows
down your connection. However, rooms and computers may still be turned off
for many other reasons (viruses, copyright, abuse of the network, and for
very large amounts of traffic as determined by the CIO's office)."



apl

----- Original Message -----
From: "Andrew Meaden" <ameaden () optusnet com au>
To: <vuln-dev () securityfocus com>
Sent: Sunday, December 01, 2002 7:07 AM
Subject: Re: "download" caps