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Network Security Pen-Test
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Re: getting different ttl values for the same IP

Subject: Re: getting different ttl values for the same IP
Date: Wed, 28 Dec 2005 19:14:28 +0100
On Wed, Dec 28, 2005 at 01:07:49PM -0000, aqua.le0@gmail.com wrote:
Hi all

While performing a TCP traceroute using cain&able i got different ttl values 
for the same ip, can anyone explain about this


10.10.10.10;401 ms (TTL=230) - TTL exceeded;411 ms (TTL=230) - TTL 
exceeded;500 ms (TTL=230) - TTL exceeded;(Unknown)

10.10.10.10;400 ms (TTL=106) - Echo Reply;401 ms (TTL=102) - Echo Reply;400 
ms (TTL=102) - Echo Reply;(Unknown);

At a guess, 10.10.10.10 is doing NAT to something that is deeper in the
network? Hard to tell without knowing what you sent, though.

Alternatively, an admin thought it nice to fsck with hackers' minds by
adding some randomness to the firewall.

                Joachim

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