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militiaware

10-25-2011 04:42 AM

Monitoring Packets Over an Open Port

I want to create a shell script that shows the size of transmitted data (sent and received) over a specific port! How is that possible?

eSelix

10-25-2011 07:19 AM

You can use iptables for this, something like:

Code:

iptables -N tcp_s80

iptables -A OUTPUT -p tcp --sport 80 -j tcp_s80

#and to read data (how many bytes/packets went by your port 80)

iptables -L -v

but every port need own rule, so it can slow down your network if you want to trace many ports. Other method is using "ntop" daemon.

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