From: Meidinger Chris (chris.meidinger@badenIT.de)
Date: Thu Mar 30 2006 - 01:25:44 EST
Hi Chris,
Look into a technique called firewalking. There you use ttl to find out how far behind a firewall or other packet filter a host has been placed.
There is a nice tutorial about writing a firewalk script in just a few lines with scapy - google firewalk + scapy to find it. That should get you started well enough that you can modify the tool for your own purposes.
Cheers,
Chris
----- Ursprüngliche Nachricht -----
Von: "Chris Hammer" <CHammer@fcbnm.com>
An: "pen-test@securityfocus.com" <pen-test@securityfocus.com>
Gesendet: 30.03.06 06:40
Betreff: Using TTL to Locate Hosts
Hello everyone, I had an interesting question posed to me earlier. The
question was "Could you use only the TTL of a packet to locate hosts and
verify they are up?" I know playing around with Tracert this could be
possible, or a crafted packet using HPING. Any other ideas or thoughts?
Thanks!
Chris
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