Looking for a network status tool Mac Based
 

I have been having problems this past week with my DSL connection. It drops for about a half hour or so every day. Once int eh afternoon, and once in the evening (but only on weekdays!)

I am looking for a free or cheap network analysis tool, one that will monitor the internet connection and tell me exactly when it goes down and when it comes back up. That I figure might help me narrow down the culprit.

Any suggestions?