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Date:      Tue, 24 Jul 2007 11:28:03 -0700
From:      Chuck Swiger <cswiger@mac.com>
To:        Samit <janasamit@wlink.com.np>
Cc:        freebsd-isp@freebsd.org
Subject:   Re: changing ttl size of forwarding packet
Message-ID:  <B3283DBE-EB4C-4281-8658-8F81E5C94775@mac.com>
In-Reply-To: <46A63AF2.40405@wlink.com.np>
References:  <46A63AF2.40405@wlink.com.np>

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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




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