topic Re: Lan enumeration in Operating System - Linux

Lan enumeration

Piotr Kirklewski — Mon, 02 Mar 2009 14:40:47 GMT

Hi Guys

I need to make a list of all the network devices, their mac addresess and IP addresses.

Could you please tell me what programs are you using to enumerate the network ?

regards

PEter

Re: Lan enumeration

smatador — Mon, 02 Mar 2009 15:19:52 GMT

Hi,

ifconfig and ethtool do the job

Re: Lan enumeration

Fredrik.eriksson — Mon, 02 Mar 2009 15:55:07 GMT

I believe something like this would print out everything you were searching for :)

It's untested since I don't have a machine to try it on.

#!/bin/bash
IFS="
"
for i in $(ifconfig -a | egrep "^(HWaddr|inet addr)"); do
case $i in
^[a-z])
devname=$(echo $i | awk {'print $1'})
macaddr=$(echo $i | awk {'print $7'})
;;
*)
ipaddr=$(echo $i | awk {'print $3'})
;;
esac
echo "$devname has MAC $macaddr and IP $ipaddr"
done

Best regards
Fredrik eriksson

Re: Lan enumeration

Fredrik.eriksson — Tue, 03 Mar 2009 14:45:25 GMT

As said earlier, not properly tested :P

#!/bin/bash
x=0
IFS="
"
for i in $(/sbin/ifconfig -a | egrep "(HWaddr|inet addr|^lo)"); do
array[$x]=$i
let x=x+1
done
IFS=""
x=0
while [ $x -lt ${#array[*]} ]; do
devname=$(echo ${array[$x]} | awk {'print $1'})
macaddr=$(echo ${array[$x]} | awk {'print $5'})

let y=x+1
ipaddr=$(echo ${array[$y]} | awk {'print $2'} | cut -d':' -f2)

echo $ipaddr | egrep "^[0-9]" &> /dev/null
[ $? -eq 0 ] || ipaddr="None"
echo $macaddr | egrep "^[0-9]" &> /dev/null
[ $? -eq 0 ] || macaddr="None"

echo "$devname has MAC $macaddr and IP $ipaddr"
let x=x+2
done

This version works atleast for me :)
Guess it would break if you have some dodgy interface output :)

Best regards
Fredrik Eriksson

Re: Lan enumeration

Ciro Iriarte — Mon, 09 Mar 2009 16:36:48 GMT

You can use nmap (nmap -sP 10.1.1.*) or a front end like cheops-ng if you prefer GUIs

Re: Lan enumeration

Wilfred Chau_1 — Mon, 09 Mar 2009 18:51:59 GMT

ip addr show