[Click] Packet Filtering

[Kaushik Kumar Ram]

Hello,

Is there a click module/element to perform packet filtering? To be  
more precise, I am looking for some existing
module which provides basic IP tables/netfilter functionality.  
Ideally, I need to perform packet filtering at an Ethernet
switch. I looked at the list of all Click elements and did not find  
anything related to packet filtering.

Any feedback will be great!

Thanks.
-Kaushik