Re: scaning the local network with arping/sh script

From: Alex Soares de Moura (alex_at_rnp.br)
Date: 04/25/05

  • Next message: Murat Balaban: "Re: scaning the local network with arping/sh script" 
    Date: Mon, 25 Apr 2005 02:15:55 -0300
To: Abu Khaled <khaled.abu@gmail.com>

    Abu Khaled wrote:

    >On 4/24/05, Alex Soares de Moura <alex@rnp.br> wrote:
    >
    >>Abu Khaled wrote:
    >>
    >>
    >>>Greetings...
    >>>
    >>>I don't know much about scripting but i tried to write one to scan my
    >>>local network using the net/arping port.
    >>>here is the script:
    >>><sciprt start>
    >>>#!/bin/sh
    >>>IP=1
    >>>while [ $IP -le 20 ]
    >>>do
    >>>echo -e ".\c"
    >>> if ( arping -c 1 -q -i rl1 10.0.0.$IP ) then
    >>> echo -e "\n10.0.0.$IP Online"
    >>> fi
    >>>IP=$(( $IP +1 ))
    >>>done
    >>>echo -e "\n"
    >>><script end>
    >>>
    >>>The script runs and reports OK but it is very slow and takes a lot of
    >>>time to scan a large network. Does anyone have an idea on how to
    >>>improve it or provide an alternate way to do it?
    >>>
    >>>PS: I used the arpscan port in the past but it is reported as broken:
    >>>Unfetchable.
    >>> I'm running FreeBSD 5.4 Stable.
    >>>
    >>>
    >>>
    >>Have you tried the ettercap tool? It's in the ports:
    >>/usr/ports/net-mgmt/ettercap
    >>
    >>Best regards,
    >>
    >>Alex
    >>
    >>
    >>
    >
    >Thanks Alex. Ettercap is a nice tool but I don't run X on my Gateway/Servers.
    >
    >
    Neither do I. :-) Now I know ettercap has a GUI...
    I've just checked the http://ettercap.sf.net/ website and - gladly - the
    GUI
    isn't the only interface option. From the website: "Running Ettercap:
    You need
    to select a user interface (no default) using -T for Text only, -C for
    the Ncurses based GUI, or -G for the nice GTK2 interface."

    Building it the way you want:
    -----------------------------------------------
    # cd /usr/ports/net-mgmt/ettercap
    # make

    You may use the following build option(s):

    WITHOUT_GTK=yes builds without GTK2+ GUI
    WITHOUT_ICONV=yes builds without support for UTF-8
    WITHOUT_PCRE=yes builds without support for perl regexps in filters
    WITHOUT_PLUGINS=yes builds without ettercap plugins
    WITHOUT_SSL=yes builds without support for SSH1 and SSL decryption
    -----------------------------------------------

    Good packet hunting,

    Alex
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