Monitoring Top Talkers PF OpenBSD

Hi,

Though I have some Linux background I'm new to BSD. Currently I'm administering an OpenBSD 5.3 firewall which based on PF.

I want to view my top talkers to the internet. If it is a graphical one that's better but I like to know whether it is possible through a command like pfctl a help is greatly appreciated.

Thanks:o

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