Start it with the help parameter to see the options.
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Viewed 10k times. I got as far as netstat -i -I en0 -b which gives you inbound bytes along with other stats for en0 replace your interface here. I'm suprised someone out there hasn't already created a script of this type as it sounds like a useful thing to have! Well, a packet sniffer is a great tool for this, and OS X has a copy of tcpdump , the open-source packet sniffer program, pre-installed.
Please note three things about tcpdump : - It's a command line tool so you'll have to use the Terminal. See the manual man tcpdump pages for options. Please make the right choice.
As a networking teacher, it's a great way to show students how insecure their network traffic really is especially stuff like telnet and ftp. Monitor your network traffic 2 comments Create New Account.
macos - Is there a good tool for monitoring network activity on Mac OS X? - Super User
The following comments are owned by whoever posted them. This site is not responsible for what they say. You want insecure? I'll show you insecure! Authored by: Cadre on Apr 08, '01 PM. Search Advanced. From our Sponsor Latest Mountain Lion Hints By connecting the Iperf server directly to the router via gigabit Ethernet, you ensure that the signal from your server to the router arrives at the best possible speed, producing test results that measure the performance of just that wireless hop from the router to the client.
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Note, however, that this only works because real-world If future wireless technologies take real-world performance beyond the gigabit barrier, then the wired connection would act as the bottleneck, requiring another form of direct connection, such as 10 Gigabit Ethernet or Thunderbolt. To illustrate the effect of a wired connection for your Iperf server, we ran the same test again, with gigabit Ethernet connecting our server Mac to the router. With all components in the same locations, the performance jumps significantly in the second test.
This gives us a true evaluation of the speed of our wireless network as it pertains to our specific router and the location of our Iperf client Mac.
If desired, you can run further tests in the opposite direction by running the server command on your client Mac and the client command on your server. While the default test is sufficient for basic testing of your home network, Iperf offers a number of advanced options, such as changing the testing time or running multiple streams at once.
How to Monitor Network Traffic On an OS X Mac
In addition to testing the performance of your home network, Iperf can also help reveal wireless dead spots in your home and guide you in finding the optimal location in which to place your router. Just run Iperf client on a MacBook and wander around your home, testing various speeds at different locations. Note, however, that this version is currently running Iperf 2, while the method described above uses Iperf 3.