From owner-freebsd-security@FreeBSD.ORG  Tue Apr 18 00:45:29 2006
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Date: Mon, 17 Apr 2006 17:45:28 -0700 (PDT)
From: "R. B. Riddick" <arne_woerner@yahoo.com>
To: Noah Silverman <noah@allresearch.com>, freebsd-security@freebsd.org
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Subject: Re: IPFW Problems?
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--- Noah Silverman <noah@allresearch.com> wrote:
> Take the following rules:
> ipfw add 00280 allow tcp from any to any 22 out via bge0 setup keep- 
> state
> ipfw add 00299 deny log all from any to any out via bge0
> ipfw add 0430 allow log tcp from any to me 22 in via bge0 setup limit  
> src-addr 2
> ipfw add 00499 deny log all from any to any in via bge0
> 
I think rule 430 needs a keep-state, because u do not have a rule, that allows
out-going ssh packets for established tcp connections.

In addition to the before-mentioned "check-state" in the beginning u would need
a "keep-state" in rule 430...

> When I install this firewall configuration, I'm locked out of the  
> box.  An inspection of the logs shows that rule 499 is being  
> triggered by an attempted incoming connection.
> 
Hmm... That's strange... What about rule 299? There should be something about
rule 299 in the logs... Maybe I am wrong...


-Arne


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