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Does anyone know how I might be able to monitor the bandwidth useage over my entire home network without setting up a server? I'm using a Linksys WRT54GL router and there doesn't seem to be any way to monitor real-time useage in its control panel. I'm wondering if there is an app or something out there that might allow this.

Ideas?

[moep]

http://www.polarcloud.com/tomato should do the trick.

here's a demo of the bandwidth monitoring feature:

http://www.polarcloud.com/v/scbwm.htm

[besson3c]

The way ISPs do it is by enabling SNMP, in tracking this data, and using a tool such as MRTG or Cacti to graph the results.

Here is Apple's doc about SNMP, although most of the instructions here are not specific to OS X:

Mac OS X Server: How to Install, Enable, and Configure SNMP