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Network traffic monitoring tools Network
For those who like statistics - and I suppose I'm one of them - here are some tips for viewing network traffic, both realtime and afterwards.

netmonitor is a small app that gives nice graphs, it can be adjusted to be displayed only in the menubar (no dock icon) and is a great little tool.

darkstat is a background deamon that gathers stats 24/7. Use it to view bandwidth per minute, hour, day or month and per host/protocol using a web-interface. Simple and effective.

ntop (also here) is a great app like 'top', but for networks. It's the app darkstat is a spin-off from, and it gives you a load of stats you can throw a stick at - also using a nice web-interface. Downside: it uses 75% of CPU resources here; I'm looking into it.

Use tcpflow if you want to see the data that goes in and out of your Mac in plain text. Great to cheat with flash games that submit scores to unknown hosts ;)

[Editor's note: I haven't tested any of these network monitoring apps.]
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Network traffic monitoring tools | 11 comments | Create New Account
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Netmonitor
Authored by: madmizzen on May 21, '02 03:21:40AM

this sounds like just the app i was looking for. unfortunately the provided link is not getting me anywhere. I did a verstiontracker search for this app and nada, and when i resorted to google to find the thing i was handed back the same homepage.mac.com address from the article.

stranger then fiction.



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Netmonitor
Authored by: madmizzen on May 21, '02 03:56:58AM

ok, so i am a moron.

the site has been suspended due to excessive bandwidth consumption. hope that it gets worked out soon.

w.



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Netmonitor
Authored by: Moo0 on May 21, '02 09:39:54AM

I'd love to mirror NetMonitor online somewhere, but I'd have to find a complete package - I'll contact the author later...



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Netmonitor is available again
Authored by: Moo0 on May 21, '02 09:43:19AM

at http://homepage.mac.com/rominar/net.dmg

I downloaded a copy, so I'll put iot only somewhere if this one goes down..



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Netmonitor Mirror
Authored by: batmanppc on May 21, '02 11:03:56PM
I've set up a mirror for the author at http://rominar.applegeeks.net/net.html. I just need the actual package for the mirror to be complete. Could someone point me to a download or send me the file. Thanks

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NetMonitor is cool - what about ntop?
Authored by: jcltech on May 21, '02 10:22:34AM
Great app - not a big resource hog either - I like the menubar display the best.


HOWEVER - when I try to run NTOP, i get the following message:
Unable to locate default interface (no suitable device found)
Can u help?



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NetMonitor is cool - what about ntop?
Authored by: Moo0 on May 21, '02 11:14:19AM

that's very well documented in various mailinglists.

try `sudo ntop -i en0` or -i ppp0

it probably can't find the default device, try looking in the mailinglists with google.



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XMonitor!
Authored by: JJ on May 21, '02 05:04:34PM

Also check out XMonitor, very nice interface, shows network but also cpu, ram & disk. Very elegant options to display lots of info, including historical graphs, or less info using less screen realestate. No web interface.

Quote: "You pay what you think it's worth, from a penny to a fortune"

http://xmonitor.forked.net/



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XMonitor!
Authored by: JJ on May 21, '02 05:08:07PM

Also check out XMonitor, very nice interface, shows network but also cpu, ram & disk. Very elegant options to display lots of info, including historical graphs, or less info using less screen realestate. No web interface.

Quote: "You pay what you think it's worth, from a penny to a fortune"

http://xmonitor.forked.net/



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Just installed/tried Net Monitor and TCPFlow
Authored by: Codemonkey on Aug 28, '02 02:29:02AM

I've been watching the incoming light on my cablemodem flickering pretty constantly for the last couple of hours and concerned that I may have left something open, I installed these two apps. Net Monitor verified that there indeed was traffic incoming. The interface is perfect imho, and sits nicely in my menubar, next to my volume slider. The resources it takes up are negligable (~2% the last time I did a TOP) and it closely resembles any number of equally well done widgets for Linux desktop managers.

Not satisified with just the bandwidth graph, I ran TCPFlow - incredible!!! Very basic to operate if you just want to quickly grab packets... but can be _so_ much more powerful! View the man page for all the juicy details.

For anyone who cares: it turns out it's virus traffic wandering around looking for compromised Windows boxes. :-)



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Network traffic filtering
Authored by: Hugo on Apr 29, '04 11:18:56AM

tcpflow works great. What I'm looking for is the possibility to prevent certain data (plain text strings) to leave my mac via TCP or UDP (similar to the feature of NetBarrier). Any ideas or hints how to do this?

Thanks

Hugo



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