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From: Chuck Swiger <cswiger@mac.com>
Date: Tue, 24 Jul 2007 11:28:03 -0700
To: Samit <janasamit@wlink.com.np>
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Cc: freebsd-isp@freebsd.org
Subject: Re: changing ttl size of forwarding packet
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On Jul 24, 2007, at 10:46 AM, Samit wrote:
> iptables can easily do it via mangle table. Is there any way using  
> ipfw2
> to change the ttl size of the forwarding packets?

The size of the TTL field is fixed by the IP protocol to 1 byte;  
perhaps you are looking for the IPFW transparent firewall option,  
which prevents it from decrementing the TTL in order to make a  
"hidden" firewall...?

-- 
-Chuck