monitor network traffic

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6 Jul 2007
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can someone recommend me some network monitoring software? Prefereably free if possible. Network has 3 24-port switches.

cheers for any help
 
Wireshark is great. I use it for part of my CCNA course as it gives so much information.

One thing you should know though, it wont monitor ALL network traffic, it can only monitor unicast, multicast or broadcast traffic that reaches your machine. If PC A send a file to PC B, PC C (your pc) wont detect the transfer on wireshark.

The only way to get wireshark to detect everything thats sent is to have a PC act as a switch/router, where by all traffic has to go through it. Or use hubs instead of switches, but i dont recomend that.
 
If the switches are managed, it might be possible to get them to send everything to a particular port. It also depends what "monitoring" you want to do...
 
If the switches are managed, it might be possible to get them to send everything to a particular port. It also depends what "monitoring" you want to do...

Nearly all managed switches will be able to do port mirroring, just mirror all ports to the one with your machine connected to.

Will be spammed endlessly with all the packets though!
 
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