traffic monitoring

[ammad shah]

dear all,

how do i find; the workstation on lan uploading/downloading from internet real time using "iptraf" or some other software. All traffic is passing through "linux (squid and iptables masquerade). since there are more than 80 workstations. i have configured mrtg to get graph of linux and switches; but users are also copying file from local file and print server, so it is useless to get graph of switches to identify Internet bandwidht. 

there are some workstations; continously uploading and downloading from Internet (may be spywares) . 

thanks for help in advance. 


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