Originally Posted by priyadarshan
I want to measure the throughput of firewall.... I meant that weather it is 4Gbps or say 40 Mbps....... than how can I do so?
Install monitoring software and configure it. Look at mrtg.
Since you ask a very vague question, it's hard to give a specific answer. What kind of firewall? Running what OS? Do you want a separate monitoring solution, do you want to monitor the network ports on the router behind it, or do you want to see a port-by-port scan?