[MLB-WIRELESS] Tracking usage when sharing broadband?

[Dave Keller]

Hi All,

Instead of measuring in a forwarding rule... Perhaps just an input rule on
the interface connected to the adsl/cable connection. As then you are not
counting the traffic between the other tenants. Coz if u play games etc or
have other comon resources that u share, it will all count & u r not sure
who has actually used the common cable bandwidth.

Ciao,
Dave

-------Original Message-------

From: davida at pobox.com
Date: Sunday, 14 April 2002 4:25:49 PM
To: melbourne wireless
Subject: Re: [MLB-WIRELESS] Tracking usage when sharing broadband?

-->"Bruce" == Bruce Paterson <paterson at tassie.net.au> writes:

Bruce> I'm thinking of using a wireless router (probably airport
Bruce> basestation connected to my mac) to share a broadband
Bruce> connection with friends in the adjacent apartments.

cool.

Bruce> Is there a way to track usage so if we know who's responsible
Bruce> for blowing the download cap :-)

depending on how things are set up, this could be easy (or not).

Bruce> And which router is recommended for this purpose (ie. which
Bruce> has the greatest range in the apartment block context)?

i use a linux box, with iptables. you can define accounting rules
pretty simply -- my setup has:

/sbin/iptables -A FORWARD -i eth2 -d 10.0.0.129
/sbin/iptables -A FORWARD -i eth2 -d 10.0.0.130
/sbin/iptables -A FORWARD -o eth2 -s 10.0.0.0/8

(ie. one chain for machine of interest, plus a common upstream chain)

and i can report the current totals like

iptables -L FORWARD -v

which gives 

Chain FORWARD (policy ACCEPT 1114K packets, 553M bytes)
pkts bytes target prot opt in out source destination
23444 16M all -- eth2 * 0.0.0.0/0 10.0.0.129
154K 115M all -- eth2 * 0.0.0.0/0 10.0.0.130
558K 57M all -- * eth2 10.0.0.0/8 0.0.0.0/0

right now.

Bruce> And is it so that the greatest possible one-way data speed
Bruce> between the wireless router and the client will be 5.5Mbps?

i think the raw bit rate, in one direction, is 11Mbps. but you won't
see that in ftp due to various protocol overheads. through the
reinforced concrete of your average apartment block, you might ahve
some trouble with getting 11Mbps working too (ie. it might fall back
to 5.5 or 2 or even 1).




d

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