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MAC OS: Network Scan tool?

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Does anyone have recommendations of their favorite low-cost tool that will run under MAC OSX 10.7 (and 10.6?) that will

  • Scan all IP addresses within a specified range to determine presence.
  • Identify what manufacturer the MAC address likely belongs to
  • Identifies which ports may be responsive.
There are a few I've seen:

  1. IP Scanner Pro (Eric Redlinger) $30
  2. Lan Scan Pro (Thomas Baudelet) $6
  3. Network Radar (Daniel Diener) $20
  4. And a bunch of others... some crap.

Before I want to spend any money (or waste a bunch of time)... What sayest the elite, the knowledgeable of the SmallNetBuilder family?
 
A really good one is nmap.
You can use the UI and do a Ping Scan (one of many):

Ex:

Just specify Target: 192.168.1.1/24


or

Command Line:

nmap -sP 192.168.1.1/24
 
Underneath all the glamor and glitz of the MacOS X user interface, there's an entire FreeBSD networking stack...

MacPorts has additional tools that have been ported over...

http://www.macports.org/index.php

Alternately, you can install a build environment, and most FOSS tools can be built and run...

sfx
 
3.2.1 runs with old Java reinstalled 3.2.3 doesn't run....

Go into the Java control panel and relax the permissions a bit - Sun/Oracle tightened things up on Java 7 update 51 and later...

sfx
 

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