Intrace

Description

InTrace is traceroute-like application that enables users to enumerate IP hops using existing TCP connections, both initiated from local network (local system) or from remote hosts. It could be useful for network reconnaissance and firewall bypassing.

  • This program is free software; you can redistribute it and/or modify

  • it under the terms of the GNU General Public License as published by

  • the Free Software Foundation; either version 2 of the License, or

  • (at your option) any later version.

  • This program is distributed in the hope that it will be useful,

  • but WITHOUT ANY WARRANTY; without even the implied warranty of

  • MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

  • GNU General Public License for more details. *

  • You should have received a copy of the GNU General Public License

  • along with this program; if not, write to the Free Software

  • Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

  • source: https://github.com/robertswiecki/intrace

Example

2. Locally initiated TCP connections

Start intrace:

    cyborg@cyborg:~$ sudo intrace -i eth0 -h www.freescale.com
    InTrace 1.2 (C)2007 Robert Swiecki <[email protected]>
    R: 192.88.156.10/ANY (0)  L: 0.0.0.0/0
    Last rcvd SEQ: 0, ACK: 0
    Waiting to acquire enough packets

Establish a TCP connection:

cyborg@cyborg:~$ nc www.freescale.com 80 GET / HTTP/1.0 

Press ENTER in the inteace console window:

    InTrace 1.2 (C)2007 Robert Swiecki <[email protected]>
    R: 192.88.156.10/ANY (80)  L: 192.168.0.5/40005
    Last rcvd SEQ: 1400545495, ACK: 3344758762
    Press ENTER to start sending packets

Now, enjoy the output

     1.    192.158.0.1       [ICMP TTL-EXCEEDED]
     2.    212.76.62.233     [ICMP TTL-EXCEEDED]
     3.         ---             [NO RESPONSE]
     4.    212.76.35.70      [ICMP TTL-EXCEEDED]
     5.    212.76.35.173     [ICMP TTL-EXCEEDED]
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