Morning Apologies for not responding sooner.

IPTraf and Ntop I should have explained are tools available within servers, but 
OS X being a FreeBSD environment means it can utilise with a little effort.

Your problem will be that not one machine is the gateway except modem, so data 
collected being log-files is not definable as reliable output for said results.

Ntop does provide information in a GUI HTML produced document via local 
address, and IPTraf gets deep within tracking usage, maybe not as pretty but a 
lot more intensive.

But as previously stated, there is not one computer being the Gateway.

Network Analyser and OpenDNS are forces you are opening your system for others 
to take advantage off, treat with due care. 
Net Monitor requires product to be installed on machines logging in and out 
including separate licenses, similar  issues again and no gateway.

I would suggest in your situation to investigate the probability of a Gateway 
server on a dedicated machine, then control of your network is possible without 
opening up doors that do not need to be opened.

I have many solutions, most free. But do take a little planning and effort to 
maintain and initially put in place.
IPcop:- Best choice very simple to install and maintain, great support via 
mailing list. Utilises antiquated PC's a bonus.. Addons like IPTraf and Ntop 
available.
ClearOS: Current choice of the pack for modern offices whom require a SAMBA 
solution. Requires more modern components.
PFsense: Current Firewall I use very strong and definable to situation with 
addons to enhance distro a little horsepower if using addons.


But to answer initial question you have to monitor each individual devices 
log-files then produce an output. Nothing simple comes to mind especially 
across platforms as most whom require this run dedicated servers, which utilise 
above mentioned sniffer style programs and then some.

Cheers!
`RobD...

On 29Dec2010, at 6:56 pm, Tim Law wrote:

> 
> Thanks Rob,
> 
>> How is your home network setup i.e., server software or distribution?
> 
> 
> The best answer I can give was in my original posting:
>>> I have 5 Mac devices, two PC laptops and occasionally an Xbox, that are 
>>> connected via ethernet or wifi to my home network and to the internet 
>>> through Bigpond Cable. 
> 
> The Cable router is a Netgear Wireless Cable Modem Gateway CG814WG
> 
> Following your suggestion, I've looked at Ntop and IPTraf, both of which seem 
> to be more suited to command line geeks, which I am not. 
> http://iptraf.seul.org/  info page was last updated in 2005 and appears to be 
> a Linux app with no reference to OSX
> 
> http://www.ntop.org/overview.html
> I've downloaded this, but I cannot figure out how to instal it. There are 
> Unix command lines that are beyond my level of knowledge. I've given up on 
> this app. 
> 
> I'm quite surprised there isn't an easy to use programme that allows us to 
> view where the internet quota is being used. If these processes can be read 
> by command line Unix tools, then how come someone ingenious soul hasn't put a 
> GUI on top of it and marketed it?
> 
> Tim
> 
> 
> 
> On 29/12/2010, at 8:27 AM, Rob Davies wrote:
> 
>> 
>> How is your home network setup i.e., server software or distribution?
>> 
>> Many options available as all machines record usage Mac for instance has 
>> many logs as do Win$. Activity Monitor, is one way of checking individual 
>> machines if on same network one can log into machine whilst on to view.
>> 
>> Other solutions are Ntop, IPTraf both can be run from OS X, but it depends 
>> on which machine is the server allowing access to internet as this is point 
>> of contact or Router/Modem which also can be used for monitoring... 
>> 
>> Cheers!
>> `RobD....
>> 
>> 
>> On 23Dec2010, at 9:45 am, Tim Law wrote:
>> 
>>> 
>>> Hello,
>>> 
>>> I have 5 Mac devices, two PC laptops and occasionally an Xbox, that are 
>>> connected via ethernet or wifi to my home network and to the internet 
>>> through Bigpond Cable. 
>>> 
>>> I am trying to determine where the main data munchers are, or as least to 
>>> confirm my suspicions that it is the PC laptops with attached 17 and 21yo 
>>> sons playing Starcraft etc. !!
>>> 
>>> I've not been able to find any software that is effective at monitoring 
>>> data traffic to individual machines.
>>> 
>>> WebSpy SOHO looks like it might do the job, but is still in development and 
>>> doesn't work on OSX properly yet. 
>>> 
>>> I would have thought routers would have logged this data, and an app could 
>>> be made to compile this, but apparently it's not that simple
>>> 
>>> Any tips welcome. 
>>> 
>>> Ta
>>> 
>>> Tim
>>> 
>>> 
>>> BTW, my neighbour solved this issue with a password change on the router, 
>>> and gifting his three children wireless sticks with one month of data on 
>>> it. After that, they paid for their own!
>>> 
>>> 
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>> 
>> 
>> 
>> 
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> 
> 
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