Network Tools

Hi after reading the Post on ASG twaeking
http://www.astaro.org/astaro-gateway...-tweaking.html
I'm looking for a tool/s so that I can measure the Firewalls Performance.
Like the Stats below:-
Firewall throughput Mbs
Firewall throughput TCP Mbs
Firewall throughput UDP Mbs
VPN throughput Mbs
Concurrent sessions

What is available out there that can be used for testing.

Thanks

Mark