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From: Michael Powell <nightrecon@verizon.net>
Date: Sat, 30 Aug 2008 04:27:46 -0400
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Subject: Re: IPFW: Is keep/check-state inherent?
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Steve Bertrand wrote:

> Hi everyone,
> 
> I can't recall for certain, but not so long ago, I either read or heard
> about IPFW having implicit keep-state and check-state.
> 
> Is it true that I can now omit these keywords in my rulesets?
> 

Haven't used IPFW in years so I do not know about IPFW. 

However, this is the case for the lastest pf upgrade/import from OpenBSD.
For pf now I think you need no state if you want to disable, as keep state
is "on" by default now. 

-Mike