[CentOS] What is the diffrence between port filtering and packet filtering ?

Hi all,

I want to set up a firewall on CentOS 4.4.

I wnat to know the diiffrence between port filtering and packet filtering ?

Can iptables do both?

Is there another pkg better than this? if so, pls let me know.

The purpose of this is to setup a firewall for production use.

-- 
Thank you
Indunil Jayasooriya
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